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#1 2012-09-11 06:07:52

sveitser
Member
Registered: 2011-07-06
Posts: 9

Thinkpad X220, Intel Advanced-N 6205, iwlist can't find most networks

I just moved into my office and am having trouble connecting to the campus wifi from within the office. It works just fine in other locations on campus with both the 5GHz and 2.4GHz bands. I'm using wpa_auto from the AUR. Whenever I fail to connect "iwlist" only reports a fraction of the actually available networks. I've tried using regdom to make sure all channels are available and iwlist confirms that they are indeed activated. Yesterday after an hour of tinkering suddely the networks showed up in "iwlist" and I could connect with the wpa_auto daemon, but I have no idea why. Today morning I can't find them anymore and wpa_auto (or wpa_supplicant) fails to connect again. The signal is even good enough for my Android device, which I'm tethering off right now.

My wireless chipset is:

[root@edge lulu]# lspci | grep Adv
03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6205 (rev 34)

I'm using the iwlwifi drivers:

[root@edge lulu]# lsmod | grep iw
iwlwifi               304490  0 
mac80211              416391  1 iwlwifi
cfg80211              173210  2 iwlwifi,mac80211

Scanning with "iwlist" shows:

[root@edge lulu]# iwlist wlan0 scan
wlan0     Scan completed :
          Cell 01 - Address: 00:07:0E:B4:3B:BF
                    Channel:9
                    Frequency:2.452 GHz (Channel 9)
                    Quality=52/70  Signal level=-58 dBm  
                    Encryption key:on
                    ESSID:"phys4501"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s
                    Mode:Master
                    Extra:tsf=000008e3561043fe
                    Extra: Last beacon: 2680ms ago
                    IE: Unknown: 00087068797334353031
                    IE: Unknown: 010482848B96
                    IE: Unknown: 030109
                    IE: Unknown: 851E000086001F00FF0319007733353435303100000000000000000000000006
                    IE: Unknown: 9606004096000700
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (1) : TKIP
                        Authentication Suites (1) : PSK
                    IE: Unknown: DD06004096010100
                    IE: Unknown: DD050040960304
                    IE: Unknown: DD1600409604000107A5000023A500004254000062430000
                    IE: Unknown: DD050040960B01
                    IE: Unknown: DD180050F2020101810003A5000027A500004254BC0062436600
          Cell 02 - Address: 00:23:EB:0A:C0:BE
                    Channel:44
                    Frequency:5.22 GHz (Channel 44)
                    Quality=31/70  Signal level=-79 dBm  
                    Encryption key:on
                    ESSID:"Universities WiFi"

But when using "iw" it discovers many other networks (notably the one I'm trying to connect to: "sMobileNet").

[root@edge lulu]# iw wlan0 scan
BSS 00:07:0e:b4:3b:bf (on wlan0)
	TSF: 9772576666034 usec (113d, 02:36:16)
	freq: 2452
	beacon interval: 100
	capability: ESS Privacy ShortPreamble APSD (0x0831)
	signal: -57.00 dBm
	last seen: 2700 ms ago
	Information elements from Probe Response frame:
	SSID: phys4501
	Supported rates: 1.0* 2.0* 5.5* 11.0* 
	DS Parameter set: channel 9
	WPA:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: TKIP
		 * Authentication suites: PSK
		 * Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
	WMM:	 * Parameter version 1
		 * u-APSD
		 * BE: CW 31-1023, AIFSN 3
		 * BK: CW 31-1023, AIFSN 7
		 * VI: CW 15-31, AIFSN 2, TXOP 6016 usec
		 * VO: CW 7-15, AIFSN 2, TXOP 3264 usec
BSS 00:23:eb:0a:c0:be (on wlan0)
	TSF: 4707555127332 usec (54d, 11:39:15)
	freq: 5220
	beacon interval: 102
	capability: ESS Privacy (0x0011)
	signal: -78.00 dBm
	last seen: 5653 ms ago
	SSID: Universities WiFi
	Supported rates: 
	TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0
	RSN:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: CCMP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
	WPA:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: TKIP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: (0x0000)
	WMM:	 * Parameter version 1
		 * u-APSD
		 * BE: CW 15-1023, AIFSN 3
		 * BK: CW 15-1023, AIFSN 7
		 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
		 * VO: CW 3-7, AIFSN 2, TXOP 1504 usec
BSS 00:23:eb:0a:c0:bf (on wlan0)
	TSF: 4707558623737 usec (54d, 11:39:18)
	freq: 5240
	beacon interval: 102
	capability: ESS Privacy (0x0011)
	signal: -78.00 dBm
	last seen: 2203 ms ago
	Information elements from Probe Response frame:
	SSID: sMobileNet
	Supported rates: 
	RSN:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: CCMP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
	WPA:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: TKIP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: (0x0000)
	WMM:	 * Parameter version 1
		 * u-APSD
		 * BE: CW 15-1023, AIFSN 3
		 * BK: CW 15-1023, AIFSN 7
		 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
		 * VO: CW 3-7, AIFSN 2, TXOP 1504 usec
BSS 00:23:eb:0a:c0:be (on wlan0)
	TSF: 4707558575104 usec (54d, 11:39:18)
	freq: 5240
	beacon interval: 102
	capability: ESS Privacy (0x0011)
	signal: -77.00 dBm
	last seen: 2203 ms ago
	Information elements from Probe Response frame:
	SSID: Universities WiFi
	Supported rates: 
	RSN:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: CCMP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
	WPA:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: TKIP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: (0x0000)
	WMM:	 * Parameter version 1
		 * u-APSD
		 * BE: CW 15-1023, AIFSN 3
		 * BK: CW 15-1023, AIFSN 7
		 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
		 * VO: CW 3-7, AIFSN 2, TXOP 1504 usec
BSS 00:25:84:ff:4f:ff (on wlan0)
	TSF: 4707987229563 usec (54d, 11:46:27)
	freq: 5805
	beacon interval: 102
	capability: ESS Privacy (0x0011)
	signal: -64.00 dBm
	last seen: 136 ms ago
	Information elements from Probe Response frame:
	SSID: sMobileNet
	Supported rates: 18.0* 24.0 36.0 48.0 54.0 
	Country: HK	Environment: Indoor/Outdoor
		Channels [36 - 48] @ 17 dBm
		Channels [52 - 64] @ 17 dBm
		Channels [149 - 165] @ 30 dBm
	HT capabilities:
		Capabilities: 0x186e
			HT20/HT40
			SM Power Save disabled
			RX HT20 SGI
			RX HT40 SGI
			No RX STBC
			Max AMSDU length: 7935 bytes
			DSSS/CCK HT40
		Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
		Minimum RX AMPDU time spacing: 8 usec (0x06)
		HT RX MCS rate indexes supported: 0-15
		HT TX MCS rate indexes are undefined
	RSN:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: CCMP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
	HT operation:
		 * primary channel: 161
		 * secondary channel offset: below
		 * STA channel width: any
		 * RIFS: 1
		 * HT protection: 20 MHz
		 * non-GF present: 1
		 * OBSS non-GF present: 0
		 * dual beacon: 0
		 * dual CTS protection: 0
		 * STBC beacon: 0
		 * L-SIG TXOP Prot: 0
		 * PCO active: 0
		 * PCO phase: 0
	WPA:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: TKIP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: (0x0000)
	WMM:	 * Parameter version 1
		 * u-APSD
		 * BE: CW 15-1023, AIFSN 3
		 * BK: CW 15-1023, AIFSN 7
		 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
		 * VO: CW 3-7, AIFSN 2, TXOP 1504 usec
BSS 00:25:84:22:fb:be (on wlan0)
	TSF: 4368456395805 usec (50d, 13:27:36)
	freq: 5180
	beacon interval: 102
	capability: ESS Privacy (0x0011)
	signal: -79.00 dBm
	last seen: 2410 ms ago
	Information elements from Probe Response frame:
	SSID: sMobileNet
	Supported rates: 18.0* 24.0 36.0 48.0 54.0 
	Country: HK	Environment: Indoor/Outdoor
		Channels [36 - 48] @ 17 dBm
		Channels [52 - 64] @ 17 dBm
		Channels [149 - 165] @ 30 dBm
	HT capabilities:
		Capabilities: 0x186e
			HT20/HT40
			SM Power Save disabled
			RX HT20 SGI
			RX HT40 SGI
			No RX STBC
			Max AMSDU length: 7935 bytes
			DSSS/CCK HT40
		Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
		Minimum RX AMPDU time spacing: 8 usec (0x06)
		HT RX MCS rate indexes supported: 0-15
		HT TX MCS rate indexes are undefined
	RSN:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: CCMP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
	HT operation:
		 * primary channel: 36
		 * secondary channel offset: above
		 * STA channel width: any
		 * RIFS: 1
		 * HT protection: no
		 * non-GF present: 1
		 * OBSS non-GF present: 0
		 * dual beacon: 0
		 * dual CTS protection: 0
		 * STBC beacon: 0
		 * L-SIG TXOP Prot: 0
		 * PCO active: 0
		 * PCO phase: 0
	WPA:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: TKIP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: (0x0000)
	WMM:	 * Parameter version 1
		 * u-APSD
		 * BE: CW 15-1023, AIFSN 3
		 * BK: CW 15-1023, AIFSN 7
		 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
		 * VO: CW 3-7, AIFSN 2, TXOP 1504 usec
BSS 00:25:84:22:fb:bf (on wlan0)
	TSF: 4368456340057 usec (50d, 13:27:36)
	freq: 5180
	beacon interval: 102
	capability: ESS Privacy (0x0011)
	signal: -78.00 dBm
	last seen: 2410 ms ago
	Information elements from Probe Response frame:
	SSID: Universities WiFi
	Supported rates: 18.0* 24.0 36.0 48.0 54.0 
	Country: HK	Environment: Indoor/Outdoor
		Channels [36 - 48] @ 17 dBm
		Channels [52 - 64] @ 17 dBm
		Channels [149 - 165] @ 30 dBm
	HT capabilities:
		Capabilities: 0x186e
			HT20/HT40
			SM Power Save disabled
			RX HT20 SGI
			RX HT40 SGI
			No RX STBC
			Max AMSDU length: 7935 bytes
			DSSS/CCK HT40
		Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
		Minimum RX AMPDU time spacing: 8 usec (0x06)
		HT RX MCS rate indexes supported: 0-15
		HT TX MCS rate indexes are undefined
	RSN:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: CCMP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
	HT operation:
		 * primary channel: 36
		 * secondary channel offset: above
		 * STA channel width: any
		 * RIFS: 1
		 * HT protection: no
		 * non-GF present: 1
		 * OBSS non-GF present: 0
		 * dual beacon: 0
		 * dual CTS protection: 0
		 * STBC beacon: 0
		 * L-SIG TXOP Prot: 0
		 * PCO active: 0
		 * PCO phase: 0
	WPA:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: TKIP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: (0x0000)
	WMM:	 * Parameter version 1
		 * u-APSD
		 * BE: CW 15-1023, AIFSN 3
		 * BK: CW 15-1023, AIFSN 7
		 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
		 * VO: CW 3-7, AIFSN 2, TXOP 1504 usec
BSS 00:23:eb:0a:c2:ce (on wlan0)
	TSF: 4707556798493 usec (54d, 11:39:16)
	freq: 5745
	beacon interval: 102
	capability: ESS Privacy (0x0011)
	signal: -80.00 dBm
	last seen: 3873 ms ago
	Information elements from Probe Response frame:
	SSID: Universities WiFi
	Supported rates: 18.0* 24.0 36.0 48.0 54.0 
	Country: HK	Environment: Indoor/Outdoor
		Channels [36 - 48] @ 17 dBm
		Channels [52 - 64] @ 17 dBm
		Channels [149 - 165] @ 30 dBm
	HT capabilities:
		Capabilities: 0x186e
			HT20/HT40
			SM Power Save disabled
			RX HT20 SGI
			RX HT40 SGI
			No RX STBC
			Max AMSDU length: 7935 bytes
			DSSS/CCK HT40
		Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
		Minimum RX AMPDU time spacing: 8 usec (0x06)
		HT RX MCS rate indexes supported: 0-15
		HT TX MCS rate indexes are undefined
	RSN:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: CCMP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
	HT operation:
		 * primary channel: 149
		 * secondary channel offset: above
		 * STA channel width: any
		 * RIFS: 1
		 * HT protection: 20 MHz
		 * non-GF present: 1
		 * OBSS non-GF present: 0
		 * dual beacon: 0
		 * dual CTS protection: 0
		 * STBC beacon: 0
		 * L-SIG TXOP Prot: 0
		 * PCO active: 0
		 * PCO phase: 0
	WPA:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: TKIP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: (0x0000)
	WMM:	 * Parameter version 1
		 * u-APSD
		 * BE: CW 15-1023, AIFSN 3
		 * BK: CW 15-1023, AIFSN 7
		 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
		 * VO: CW 3-7, AIFSN 2, TXOP 1504 usec
BSS 00:23:eb:0a:f6:df (on wlan0)
	TSF: 5311092123676 usec (61d, 11:18:12)
	freq: 5320
	beacon interval: 102
	capability: ESS Privacy (0x0011)
	signal: -84.00 dBm
	last seen: 1810 ms ago
	SSID: sMobileNet
	Supported rates: 18.0* 24.0 36.0 48.0 54.0 
	TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0
	Country: HK	Environment: Indoor/Outdoor
		Channels [36 - 48] @ 17 dBm
		Channels [52 - 64] @ 17 dBm
		Channels [149 - 165] @ 30 dBm
	HT capabilities:
		Capabilities: 0x186e
			HT20/HT40
			SM Power Save disabled
			RX HT20 SGI
			RX HT40 SGI
			No RX STBC
			Max AMSDU length: 7935 bytes
			DSSS/CCK HT40
		Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
		Minimum RX AMPDU time spacing: 8 usec (0x06)
		HT RX MCS rate indexes supported: 0-15
		HT TX MCS rate indexes are undefined
	RSN:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: CCMP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
	HT operation:
		 * primary channel: 64
		 * secondary channel offset: below
		 * STA channel width: any
		 * RIFS: 1
		 * HT protection: no
		 * non-GF present: 1
		 * OBSS non-GF present: 0
		 * dual beacon: 0
		 * dual CTS protection: 0
		 * STBC beacon: 0
		 * L-SIG TXOP Prot: 0
		 * PCO active: 0
		 * PCO phase: 0
	WPA:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: TKIP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: (0x0000)
	WMM:	 * Parameter version 1
		 * u-APSD
		 * BE: CW 15-1023, AIFSN 3
		 * BK: CW 15-1023, AIFSN 7
		 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
		 * VO: CW 3-7, AIFSN 2, TXOP 1504 usec
BSS 00:23:eb:0a:cd:40 (on wlan0)
	TSF: 4707548547624 usec (54d, 11:39:08)
	freq: 2437
	beacon interval: 102
	capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
	signal: -80.00 dBm
	last seen: 6183 ms ago
	SSID: sMobileNet
	Supported rates: 9.0 11.0* 12.0 18.0 24.0 36.0 48.0 54.0 
	DS Parameter set: channel 6
	TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0
	Country: HK	Environment: Indoor/Outdoor
		Channels [1 - 11] @ 30 dBm
	ERP: Use_Protection
	HT capabilities:
		Capabilities: 0x182c
			HT20
			SM Power Save disabled
			RX HT20 SGI
			No RX STBC
			Max AMSDU length: 7935 bytes
			DSSS/CCK HT40
		Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
		Minimum RX AMPDU time spacing: 8 usec (0x06)
		HT RX MCS rate indexes supported: 0-15
		HT TX MCS rate indexes are undefined
	RSN:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: CCMP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
	HT operation:
		 * primary channel: 6
		 * secondary channel offset: no secondary
		 * STA channel width: 20 MHz
		 * RIFS: 0
		 * HT protection: nonmember
		 * non-GF present: 1
		 * OBSS non-GF present: 0
		 * dual beacon: 0
		 * dual CTS protection: 0
		 * STBC beacon: 0
		 * L-SIG TXOP Prot: 0
		 * PCO active: 0
		 * PCO phase: 0
	WPA:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: TKIP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: (0x0000)
	WMM:	 * Parameter version 1
		 * u-APSD
		 * BE: CW 15-1023, AIFSN 3
		 * BK: CW 15-1023, AIFSN 7
		 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
		 * VO: CW 3-7, AIFSN 2, TXOP 1504 usec
BSS 00:26:66:fc:9b:e0 (on wlan0)
	TSF: 78475366783 usec (0d, 21:47:55)
	freq: 2462
	beacon interval: 100
	capability: ESS Privacy ShortSlotTime (0x0411)
	signal: -87.00 dBm
	last seen: 29690 ms ago
	SSID: KJM
	Supported rates: 1.0* 2.0* 5.5* 11.0* 6.0 9.0 12.0 18.0 
	DS Parameter set: channel 11
	TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0
	ERP: Barker_Preamble_Mode
	Extended supported rates: 24.0 36.0 48.0 54.0 
	HT capabilities:
		Capabilities: 0x106e
			HT20/HT40
			SM Power Save disabled
			RX HT20 SGI
			RX HT40 SGI
			No RX STBC
			Max AMSDU length: 3839 bytes
			DSSS/CCK HT40
		Maximum RX AMPDU length 32767 bytes (exponent: 0x002)
		Minimum RX AMPDU time spacing: 16 usec (0x07)
		HT RX MCS rate indexes supported: 0-15
		HT TX MCS rate indexes are undefined
	HT operation:
		 * primary channel: 11
		 * secondary channel offset: below
		 * STA channel width: any
		 * RIFS: 0
		 * HT protection: no
		 * non-GF present: 0
		 * OBSS non-GF present: 0
		 * dual beacon: 0
		 * dual CTS protection: 0
		 * STBC beacon: 0
		 * L-SIG TXOP Prot: 0
		 * PCO active: 0
		 * PCO phase: 0
	WPA:	 * Version: 1
		 * Group cipher: CCMP
		 * Pairwise ciphers: CCMP
		 * Authentication suites: PSK
	WMM:	 * Parameter version 1
		 * u-APSD
		 * BE: CW 15-1023, AIFSN 3
		 * BK: CW 15-1023, AIFSN 7
		 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
		 * VO: CW 3-7, AIFSN 2, TXOP 1504 usec
	WPS:	 * Version: 1.0
		 * Wi-Fi Protected Setup State: 2 (Configured)
BSS 00:25:84:22:fb:b1 (on wlan0)
	TSF: 4368453206232 usec (50d, 13:27:33)
	freq: 2462
	beacon interval: 102
	capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
	signal: -67.00 dBm
	last seen: 6100 ms ago
	SSID: sMobileNet
	Supported rates: 9.0 11.0* 12.0 18.0 24.0 36.0 48.0 54.0 
	DS Parameter set: channel 11
	TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0
	Country: HK	Environment: Indoor/Outdoor
		Channels [1 - 11] @ 30 dBm
	ERP: <no flags>
	HT capabilities:
		Capabilities: 0x182c
			HT20
			SM Power Save disabled
			RX HT20 SGI
			No RX STBC
			Max AMSDU length: 7935 bytes
			DSSS/CCK HT40
		Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
		Minimum RX AMPDU time spacing: 8 usec (0x06)
		HT RX MCS rate indexes supported: 0-15
		HT TX MCS rate indexes are undefined
	RSN:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: CCMP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
	HT operation:
		 * primary channel: 11
		 * secondary channel offset: no secondary
		 * STA channel width: 20 MHz
		 * RIFS: 1
		 * HT protection: no
		 * non-GF present: 1
		 * OBSS non-GF present: 0
		 * dual beacon: 0
		 * dual CTS protection: 0
		 * STBC beacon: 0
		 * L-SIG TXOP Prot: 0
		 * PCO active: 0
		 * PCO phase: 0
	WPA:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: TKIP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: (0x0000)
	WMM:	 * Parameter version 1
		 * u-APSD
		 * BE: CW 15-1023, AIFSN 3
		 * BK: CW 15-1023, AIFSN 7
		 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
		 * VO: CW 3-7, AIFSN 2, TXOP 1504 usec
BSS 00:23:eb:0a:c2:c0 (on wlan0)
	TSF: 4707555127513 usec (54d, 11:39:15)
	freq: 2462
	beacon interval: 102
	capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
	signal: -64.00 dBm
	last seen: 6090 ms ago
	SSID: sMobileNet
	Supported rates: 9.0 11.0* 12.0 18.0 24.0 36.0 48.0 54.0 
	DS Parameter set: channel 11
	TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0 (+ 3 octets)
	Country: HK	Environment: Indoor/Outdoor
		Channels [1 - 11] @ 30 dBm
	ERP: <no flags>
	HT capabilities:
		Capabilities: 0x182c
			HT20
			SM Power Save disabled
			RX HT20 SGI
			No RX STBC
			Max AMSDU length: 7935 bytes
			DSSS/CCK HT40
		Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
		Minimum RX AMPDU time spacing: 8 usec (0x06)
		HT RX MCS rate indexes supported: 0-15
		HT TX MCS rate indexes are undefined
	RSN:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: CCMP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
	HT operation:
		 * primary channel: 11
		 * secondary channel offset: no secondary
		 * STA channel width: 20 MHz
		 * RIFS: 0
		 * HT protection: non-HT mixed
		 * non-GF present: 1
		 * OBSS non-GF present: 0
		 * dual beacon: 0
		 * dual CTS protection: 0
		 * STBC beacon: 0
		 * L-SIG TXOP Prot: 0
		 * PCO active: 0
		 * PCO phase: 0
	WPA:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: TKIP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: (0x0000)
	WMM:	 * Parameter version 1
		 * u-APSD
		 * BE: CW 15-1023, AIFSN 3
		 * BK: CW 15-1023, AIFSN 7
		 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
		 * VO: CW 3-7, AIFSN 2, TXOP 1504 usec
BSS 00:23:eb:0a:c0:b1 (on wlan0)
	TSF: 4707555127512 usec (54d, 11:39:15)
	freq: 2412
	beacon interval: 102
	capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
	signal: -73.00 dBm
	last seen: 6256 ms ago
	SSID: Universities WiFi
	Supported rates: 9.0 11.0* 12.0 18.0 24.0 36.0 48.0 54.0 
	DS Parameter set: channel 1
	TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0 (+ 3 octets)
	Country: HK	Environment: Indoor/Outdoor
		Channels [1 - 11] @ 30 dBm
	ERP: Use_Protection
	HT capabilities:
		Capabilities: 0x182c
			HT20
			SM Power Save disabled
			RX HT20 SGI
			No RX STBC
			Max AMSDU length: 7935 bytes
			DSSS/CCK HT40
		Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
		Minimum RX AMPDU time spacing: 8 usec (0x06)
		HT RX MCS rate indexes supported: 0-15
		HT TX MCS rate indexes are undefined
	RSN:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: CCMP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
	HT operation:
		 * primary channel: 1
		 * secondary channel offset: no secondary
		 * STA channel width: 20 MHz
		 * RIFS: 0
		 * HT protection: nonmember
		 * non-GF present: 1
		 * OBSS non-GF present: 0
		 * dual beacon: 0
		 * dual CTS protection: 0
		 * STBC beacon: 0
		 * L-SIG TXOP Prot: 0
		 * PCO active: 0
		 * PCO phase: 0
	WPA:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: TKIP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: (0x0000)
	WMM:	 * Parameter version 1
		 * u-APSD
		 * BE: CW 15-1023, AIFSN 3
		 * BK: CW 15-1023, AIFSN 7
		 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
		 * VO: CW 3-7, AIFSN 2, TXOP 1504 usec
BSS 00:23:eb:0a:b4:f1 (on wlan0)
	TSF: 4707564632281 usec (54d, 11:39:24)
	freq: 2462
	beacon interval: 102
	capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
	signal: -79.00 dBm
	last seen: 6083 ms ago
	SSID: Universities WiFi
	Supported rates: 9.0 11.0* 12.0 18.0 24.0 36.0 48.0 54.0 
	DS Parameter set: channel 11
	TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0 (+ 3 octets)
	Country: HK	Environment: Indoor/Outdoor
		Channels [1 - 11] @ 30 dBm
	ERP: Use_Protection
	HT capabilities:
		Capabilities: 0x182c
			HT20
			SM Power Save disabled
			RX HT20 SGI
			No RX STBC
			Max AMSDU length: 7935 bytes
			DSSS/CCK HT40
		Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
		Minimum RX AMPDU time spacing: 8 usec (0x06)
		HT RX MCS rate indexes supported: 0-15
		HT TX MCS rate indexes are undefined
	RSN:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: CCMP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
	HT operation:
		 * primary channel: 11
		 * secondary channel offset: no secondary
		 * STA channel width: 20 MHz
		 * RIFS: 0
		 * HT protection: nonmember
		 * non-GF present: 1
		 * OBSS non-GF present: 0
		 * dual beacon: 0
		 * dual CTS protection: 0
		 * STBC beacon: 0
		 * L-SIG TXOP Prot: 0
		 * PCO active: 0
		 * PCO phase: 0
	WPA:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: TKIP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: (0x0000)
	WMM:	 * Parameter version 1
		 * u-APSD
		 * BE: CW 15-1023, AIFSN 3
		 * BK: CW 15-1023, AIFSN 7
		 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
		 * VO: CW 3-7, AIFSN 2, TXOP 1504 usec
BSS 00:23:eb:0a:f6:d0 (on wlan0)
	TSF: 5311088259289 usec (61d, 11:18:08)
	freq: 2412
	beacon interval: 102
	capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
	signal: -79.00 dBm
	last seen: 6273 ms ago
	SSID: sMobileNet
	Supported rates: 9.0 11.0* 12.0 18.0 24.0 36.0 48.0 54.0 
	DS Parameter set: channel 1
	TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0
	Country: HK	Environment: Indoor/Outdoor
		Channels [1 - 11] @ 30 dBm
	ERP: <no flags>
	HT capabilities:
		Capabilities: 0x182c
			HT20
			SM Power Save disabled
			RX HT20 SGI
			No RX STBC
			Max AMSDU length: 7935 bytes
			DSSS/CCK HT40
		Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
		Minimum RX AMPDU time spacing: 8 usec (0x06)
		HT RX MCS rate indexes supported: 0-15
		HT TX MCS rate indexes are undefined
	RSN:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: CCMP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
	HT operation:
		 * primary channel: 1
		 * secondary channel offset: no secondary
		 * STA channel width: 20 MHz
		 * RIFS: 1
		 * HT protection: no
		 * non-GF present: 1
		 * OBSS non-GF present: 0
		 * dual beacon: 0
		 * dual CTS protection: 0
		 * STBC beacon: 0
		 * L-SIG TXOP Prot: 0
		 * PCO active: 0
		 * PCO phase: 0
	WPA:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: TKIP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: (0x0000)
	WMM:	 * Parameter version 1
		 * u-APSD
		 * BE: CW 15-1023, AIFSN 3
		 * BK: CW 15-1023, AIFSN 7
		 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
		 * VO: CW 3-7, AIFSN 2, TXOP 1504 usec
BSS 00:25:84:ff:4f:f0 (on wlan0)
	TSF: 4707981797593 usec (54d, 11:46:21)
	freq: 2437
	beacon interval: 102
	capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
	signal: -54.00 dBm
	last seen: 6173 ms ago
	SSID: sMobileNet
	Supported rates: 9.0 11.0* 12.0 18.0 24.0 36.0 48.0 54.0 
	DS Parameter set: channel 6
	TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0 (+ 3 octets)
	Country: HK	Environment: Indoor/Outdoor
		Channels [1 - 11] @ 30 dBm
	ERP: <no flags>
	HT capabilities:
		Capabilities: 0x182c
			HT20
			SM Power Save disabled
			RX HT20 SGI
			No RX STBC
			Max AMSDU length: 7935 bytes
			DSSS/CCK HT40
		Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
		Minimum RX AMPDU time spacing: 8 usec (0x06)
		HT RX MCS rate indexes supported: 0-15
		HT TX MCS rate indexes are undefined
	RSN:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: CCMP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
	HT operation:
		 * primary channel: 6
		 * secondary channel offset: no secondary
		 * STA channel width: 20 MHz
		 * RIFS: 1
		 * HT protection: no
		 * non-GF present: 1
		 * OBSS non-GF present: 0
		 * dual beacon: 0
		 * dual CTS protection: 0
		 * STBC beacon: 0
		 * L-SIG TXOP Prot: 0
		 * PCO active: 0
		 * PCO phase: 0
	WPA:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: TKIP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: (0x0000)
	WMM:	 * Parameter version 1
		 * u-APSD
		 * BE: CW 15-1023, AIFSN 3
		 * BK: CW 15-1023, AIFSN 7
		 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
		 * VO: CW 3-7, AIFSN 2, TXOP 1504 usec
BSS 00:25:84:23:1b:f0 (on wlan0)
	TSF: 4707554396377 usec (54d, 11:39:14)
	freq: 2462
	beacon interval: 102
	capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
	signal: -86.00 dBm
	last seen: 29773 ms ago
	SSID: sMobileNet
	Supported rates: 9.0 11.0* 12.0 18.0 24.0 36.0 48.0 54.0 
	DS Parameter set: channel 11
	TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0
	Country: HK	Environment: Indoor/Outdoor
		Channels [1 - 11] @ 30 dBm
	ERP: <no flags>
	HT capabilities:
		Capabilities: 0x182c
			HT20
			SM Power Save disabled
			RX HT20 SGI
			No RX STBC
			Max AMSDU length: 7935 bytes
			DSSS/CCK HT40
		Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
		Minimum RX AMPDU time spacing: 8 usec (0x06)
		HT RX MCS rate indexes supported: 0-15
		HT TX MCS rate indexes are undefined
	RSN:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: CCMP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
	HT operation:
		 * primary channel: 11
		 * secondary channel offset: no secondary
		 * STA channel width: 20 MHz
		 * RIFS: 0
		 * HT protection: non-HT mixed
		 * non-GF present: 1
		 * OBSS non-GF present: 0
		 * dual beacon: 0
		 * dual CTS protection: 0
		 * STBC beacon: 0
		 * L-SIG TXOP Prot: 0
		 * PCO active: 0
		 * PCO phase: 0
	WPA:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: TKIP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: (0x0000)
	WMM:	 * Parameter version 1
		 * u-APSD
		 * BE: CW 15-1023, AIFSN 3
		 * BK: CW 15-1023, AIFSN 7
		 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
		 * VO: CW 3-7, AIFSN 2, TXOP 1504 usec
BSS 00:23:eb:0a:c0:bf (on wlan0)
	TSF: 4707558574116 usec (54d, 11:39:18)
	freq: 5220
	beacon interval: 102
	capability: ESS Privacy (0x0011)
	signal: -75.00 dBm
	last seen: 2253 ms ago
	SSID: sMobileNet
	Supported rates: 
	TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0
	RSN:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: CCMP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
	WPA:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: TKIP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: (0x0000)
	WMM:	 * Parameter version 1
		 * u-APSD
		 * BE: CW 15-1023, AIFSN 3
		 * BK: CW 15-1023, AIFSN 7
		 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
		 * VO: CW 3-7, AIFSN 2, TXOP 1504 usec
BSS 00:23:eb:0a:c2:cf (on wlan0)
	TSF: 4707541131293 usec (54d, 11:39:01)
	freq: 5745
	beacon interval: 102
	capability: ESS Privacy (0x0011)
	signal: -80.00 dBm
	last seen: 19590 ms ago
	Information elements from Probe Response frame:
	SSID: sMobileNet
	Supported rates: 18.0* 24.0 36.0 48.0 54.0 
	Country: HK	Environment: Indoor/Outdoor
		Channels [36 - 48] @ 17 dBm
		Channels [52 - 64] @ 17 dBm
		Channels [149 - 165] @ 30 dBm
	HT capabilities:
		Capabilities: 0x186e
			HT20/HT40
			SM Power Save disabled
			RX HT20 SGI
			RX HT40 SGI
			No RX STBC
			Max AMSDU length: 7935 bytes
			DSSS/CCK HT40
		Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
		Minimum RX AMPDU time spacing: 8 usec (0x06)
		HT RX MCS rate indexes supported: 0-15
		HT TX MCS rate indexes are undefined
	RSN:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: CCMP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
	HT operation:
		 * primary channel: 149
		 * secondary channel offset: above
		 * STA channel width: any
		 * RIFS: 1
		 * HT protection: 20 MHz
		 * non-GF present: 1
		 * OBSS non-GF present: 0
		 * dual beacon: 0
		 * dual CTS protection: 0
		 * STBC beacon: 0
		 * L-SIG TXOP Prot: 0
		 * PCO active: 0
		 * PCO phase: 0
	WPA:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: TKIP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: (0x0000)
	WMM:	 * Parameter version 1
		 * u-APSD
		 * BE: CW 15-1023, AIFSN 3
		 * BK: CW 15-1023, AIFSN 7
		 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
		 * VO: CW 3-7, AIFSN 2, TXOP 1504 usec
BSS 00:27:19:d6:f9:14 (on wlan0)
	TSF: 5356189696428 usec (61d, 23:49:49)
	freq: 2437
	beacon interval: 100
	capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
	signal: -90.00 dBm
	last seen: 14026 ms ago
	SSID: Dante
	Supported rates: 1.0* 2.0* 5.5* 11.0* 6.0 12.0 24.0 36.0 
	DS Parameter set: channel 6
	TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0
	ERP: Use_Protection
	Extended supported rates: 9.0 18.0 48.0 54.0 
BSS 00:17:df:aa:c1:20 (on wlan0)
	TSF: 25708204252 usec (0d, 07:08:28)
	freq: 2427
	beacon interval: 102
	capability: ESS ShortPreamble ShortSlotTime (0x0421)
	signal: -86.00 dBm
	last seen: 2843 ms ago
	SSID: \x00
	Supported rates: 11.0* 12.0 18.0 24.0 36.0 48.0 54.0 
	DS Parameter set: channel 4
	TIM: DTIM Count 0 DTIM Period 2 Bitmap Control 0x0 Bitmap[0] 0xc (+ 3 octets)
	Country: HK	Environment: Indoor only
		Channels [1 - 11] @ 26 dBm
	ERP: <no flags>
	WMM:	 * Parameter version 1
		 * u-APSD
		 * BE: CW 31-1023, AIFSN 3
		 * BK: CW 31-1023, AIFSN 7
		 * VI: CW 15-31, AIFSN 2, TXOP 6016 usec
		 * VO: CW 7-15, AIFSN 2, TXOP 3264 usec
BSS 00:25:84:22:fb:b0 (on wlan0)
	TSF: 4368456653067 usec (50d, 13:27:36)
	freq: 2462
	beacon interval: 102
	capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
	signal: -63.00 dBm
	last seen: 2703 ms ago
	SSID: Universities WiFi
	Supported rates: 9.0 11.0* 12.0 18.0 24.0 36.0 48.0 54.0 
	DS Parameter set: channel 11
	TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0
	Country: HK	Environment: Indoor/Outdoor
		Channels [1 - 11] @ 30 dBm
	ERP: <no flags>
	HT capabilities:
		Capabilities: 0x182c
			HT20
			SM Power Save disabled
			RX HT20 SGI
			No RX STBC
			Max AMSDU length: 7935 bytes
			DSSS/CCK HT40
		Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
		Minimum RX AMPDU time spacing: 8 usec (0x06)
		HT RX MCS rate indexes supported: 0-15
		HT TX MCS rate indexes are undefined
	RSN:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: CCMP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: 4-PTKSA-RC 4-GTKSA-RC (0x0028)
	HT operation:
		 * primary channel: 11
		 * secondary channel offset: no secondary
		 * STA channel width: 20 MHz
		 * RIFS: 1
		 * HT protection: no
		 * non-GF present: 1
		 * OBSS non-GF present: 0
		 * dual beacon: 0
		 * dual CTS protection: 0
		 * STBC beacon: 0
		 * L-SIG TXOP Prot: 0
		 * PCO active: 0
		 * PCO phase: 0
	WPA:	 * Version: 1
		 * Group cipher: TKIP
		 * Pairwise ciphers: TKIP
		 * Authentication suites: IEEE 802.1X
		 * Capabilities: (0x0000)
	WMM:	 * Parameter version 1
		 * u-APSD
		 * BE: CW 15-1023, AIFSN 3
		 * BK: CW 15-1023, AIFSN 7
		 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
		 * VO: CW 3-7, AIFSN 2, TXOP 1504 usec

Half a minute of monitoring with airodump-ng shows this

 BSSID              PWR  Beacons    #Data, #/s  CH  MB   ENC  CIPHER AUTH ESSID                                                                                                                  
                                                                                                                                                                                                 
 00:1F:CA:5D:60:00   -1        0        0    0  11  -1                    <length:  0>                                                                                                           
 7E:51:E5:8B:D7:A0   -1        3        0    0   6  11   OPN              hpsetup                                                                                                                
 00:07:0E:B4:3B:BF  -54       75        0    0   9  11e. WPA  TKIP   PSK  phys4501                                                                                                               
 00:00:00:00:00:00  -60        0        0    0 158  -1                    <length:  0>                                                                                                           
 00:25:84:FF:4F:F0  -63       16       83    0   6  54e. WPA2 CCMP   MGT  sMobileNet                                                                                                             
 00:23:EB:0A:C2:C1  -66       15        0    0  11  54e. WPA2 CCMP   MGT  Universities WiFi                                                                                                      
 00:25:84:22:FB:B0  -67       16        0    0  11  54e. WPA2 CCMP   MGT  Universities WiFi                                                                                                      
 00:25:84:22:FB:B1  -67       17      342    0  11  54e. WPA2 CCMP   MGT  sMobileNet                                                                                                             
 00:23:EB:0A:C0:B0  -72       20        1    0   1  54e. WPA2 CCMP   MGT  sMobileNet                                                                                                             
 00:23:EB:0A:C0:B1  -71       20        0    0   1  54e. WPA2 CCMP   MGT  Universities WiFi                                                                                                      
 00:23:EB:0A:B4:F0  -81       12        1    0  11  54e. WPA2 CCMP   MGT  sMobileNet                                                                                                             
 00:23:EB:0A:CD:41  -81       13        1    0   6  54e. WPA2 CCMP   MGT  Universities WiFi                                                                                                      
 00:25:84:23:1B:F0  -81        9        0    0  11  54e. WPA2 CCMP   MGT  sMobileNet                                                                                                             
 00:25:84:23:1B:F1  -81        7        0    0  11  54e. WPA2 CCMP   MGT  Universities WiFi                                                                                                      
 00:23:EB:0A:CD:40  -81       13        0    0   6  54e. WPA2 CCMP   MGT  sMobileNet                                                                                                             
 00:23:EB:0A:B4:F1  -82       13        0    0  11  54e. WPA2 CCMP   MGT  Universities WiFi                                                                                                      
 00:17:DF:AA:C1:20  -83        3        0    0   4  54e. OPN              <length:  1>                                                                                                           
 00:17:DF:AA:C1:21  -83        3        0    0   4  54e. WPA2 CCMP   MGT  eduroam                                                                                                                
 00:26:66:FC:9B:E0  -84       15        0    0  11  54e  WPA  CCMP   PSK  KJM                                                                                                                    
 00:25:84:23:1A:20  -84        7        0    0   6  54e. WPA2 CCMP   MGT  sMobileNet                                                                                                             
 00:17:DF:AA:C1:22  -84        4        1    0   4  54e. WPA2 CCMP   MGT  sMobileNet                                                                                                             
 00:25:84:22:FB:40  -85        2        0    0   6  54e. WPA2 CCMP   MGT  sMobileNet                                                                                                             
 00:23:EB:0B:4F:60  -86        1        1    0   6  54e. WPA2 CCMP   MGT  sMobileNet                                                                                                             
 00:23:EB:3A:83:50  -87        0        8    0 158  -1   OPN              <length:  0>                                                                                                           
 00:25:84:23:1A:80  -87        1        4    0   1  54e. WPA2 CCMP   MGT  sMobileNet                                                                                                             
 00:23:EB:3A:2E:20  -87        0        2    0 158  -1   WPA              <length:  0>                                                                                                           
 00:27:19:D6:F9:14  -90        3        0    0   6  54 . WEP  WEP         Dante                                                                                                                  
 00:23:EB:0A:C2:C0  -91       16        5    1  11  54e. WPA2 CCMP   MGT  sMobileNet                                                                                                             
 00:23:EB:0A:F6:D0  -86       21      211    0   1  54e. WPA2 CCMP   MGT  sMobileNet                 

Any help or suggestions on what to try would be greatly appreciated.

Offline

#2 2012-09-13 04:40:53

earsplit
Member
Registered: 2012-03-31
Posts: 187
Website

Re: Thinkpad X220, Intel Advanced-N 6205, iwlist can't find most networks

I'm having similar connection issues on my X230 with the Intel Ultimate-N 6300 at my university.  Could I ask you for your kernel version (output of uname -r)?  I couldn't get it working on Arch or even Ubuntu. I think it's a bug in the iwlwifi driver.  Bugzilla time?

Last edited by earsplit (2012-09-13 04:41:14)


((( configs :: website )))

Offline

#3 2012-09-13 06:18:55

sveitser
Member
Registered: 2011-07-06
Posts: 9

Re: Thinkpad X220, Intel Advanced-N 6205, iwlist can't find most networks

Kernel version is: 3.5.3-1

On another note, today iwlist still finds only a fraction of the APs in the area but this time the one with the strongest signal is among them and I can connect without any issues.

edit:
I have no idea whether or not this is a bug or if "iwlist scan" is omitting some networks for some good reason. If it was a driver issue shouldn't "iw scan" also fail to find the networks in my case?

Last edited by sveitser (2012-09-13 06:22:54)

Offline

#4 2012-09-13 22:58:33

rdjack21
Member
Registered: 2011-05-04
Posts: 11

Re: Thinkpad X220, Intel Advanced-N 6205, iwlist can't find most networks

I'm having similar issues on my X220 with a 6300 card. I'm not having the same issue on my T410 with a 6200 card. In my case though not only does it not find the networks all the time when it does find them it has a real flaky connection that comes and goes.

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#5 2012-09-13 23:58:45

earsplit
Member
Registered: 2012-03-31
Posts: 187
Website

Re: Thinkpad X220, Intel Advanced-N 6205, iwlist can't find most networks

Relevant post from the same iwlwifi driver issue in Ubuntu. Check here in case it gets solved.

http://ubuntuforums.org/showthread.php?t=2056108


((( configs :: website )))

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#6 2012-09-25 02:38:07

sveitser
Member
Registered: 2011-07-06
Posts: 9

Re: Thinkpad X220, Intel Advanced-N 6205, iwlist can't find most networks

The following seems to help whenever the scanning fails to find what it's supposed to find. I reload the iwlwifi module and turn the interface off and on again. Then I'm almost immediately connected. In summary, here's what I do:

rmmod iwlwifi
modprobe iwlwifi
ifconfig wlan0 down
ifconfig wlan0 up

Restarting wpa_auto instead of doing ifconfig down/up seems to make the problem reappear in my case o_O.

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#7 2012-09-25 06:16:19

earsplit
Member
Registered: 2012-03-31
Posts: 187
Website

Re: Thinkpad X220, Intel Advanced-N 6205, iwlist can't find most networks

I've recently switched to netcfg on arch and this issue has been solved for me.  Assuming your wireless is PEAP/MACHV2, try the following netcfg profile:

CONNECTION='wireless'
INTERFACE=wlan0 # you may need to change this
SECURITY='wpa-configsection'
IP='dhcp'
CONFIGSECTION='
    ssid="NETWORKNAME"
    key_mgmt=WPA-EAP
    eap=PEAP MSCHAPV2
    group=CCMP
    pairwise=CCMP
    identity="YOURUSERNAME"
    password="YOURPASSWORD"
    priority=1
    phase1="peapver=0"
    phase2="MSCHAPV2"'

This allows me to connect immediately at 10MB/s on my campus wifi. Happy happy me!


((( configs :: website )))

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#8 2012-09-25 11:55:36

David Batson
Member
Registered: 2011-10-13
Posts: 640

Re: Thinkpad X220, Intel Advanced-N 6205, iwlist can't find most networks

I have also been using netcfg on Arch with my X220 and the Intel 6205.  Haven't noticed any connection problems in Arch (or Fedora or Mageia).  Most of my connection problems are in Windows 7!

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