You are not logged in.
- Topics: Active | Unanswered
#1 2019-03-16 17:28:47
- Velaar
- Member
- Registered: 2019-03-16
- Posts: 1
Broadcom BCM43602 ignores 80MHz and always connects on 40MHz.
Hi,
The adapter comes from Apple MacBook Pro 2014. And in Linux (only) it consistently ignores 80MHz width across all channels.
Got a feeling that I don't understand how Linux Kernel chooses channel width as other devices seem to have no problem with those access points.
Here is the device:
lspci -nn | grep Broadcom
02:00.0 Network controller [0280]: Broadcom Inc. and subsidiaries BCM43602 802.11ac Wireless LAN SoC [14e4:43ba] (rev 01)The kernel thinks that phy0 is Short GI (80MHz) capable:
# iw phy0 info
Wiphy phy0
max # scan SSIDs: 10
max scan IEs length: 2048 bytes
max # sched scan SSIDs: 0
max # match sets: 0
max # scan plans: 1
max scan plan interval: -1
max scan plan iterations: 0
Retry short limit: 7
Retry long limit: 4
Coverage class: 0 (up to 0m)
Device supports roaming.
Device supports T-DLS.
Supported Ciphers:
* WEP40 (00-0f-ac:1)
* WEP104 (00-0f-ac:5)
* TKIP (00-0f-ac:2)
* CCMP-128 (00-0f-ac:4)
* CMAC (00-0f-ac:6)
Available Antennas: TX 0 RX 0
Supported interface modes:
* IBSS
* managed
* AP
* P2P-client
* P2P-GO
* P2P-device
Band 1:
Capabilities: 0x1022
HT20/HT40
Static SM Power Save
RX HT20 SGI
No RX STBC
Max AMSDU length: 3839 bytes
DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 16 usec (0x07)
HT TX/RX MCS rate indexes supported: 0-23
Bitrates (non-HT):
* 1.0 Mbps
* 2.0 Mbps (short preamble supported)
* 5.5 Mbps (short preamble supported)
* 11.0 Mbps (short preamble supported)
* 6.0 Mbps
* 9.0 Mbps
* 12.0 Mbps
* 18.0 Mbps
* 24.0 Mbps
* 36.0 Mbps
* 48.0 Mbps
* 54.0 Mbps
Frequencies:
* 2412 MHz [1] (20.0 dBm)
* 2417 MHz [2] (20.0 dBm)
* 2422 MHz [3] (20.0 dBm)
* 2427 MHz [4] (20.0 dBm)
* 2432 MHz [5] (20.0 dBm)
* 2437 MHz [6] (20.0 dBm)
* 2442 MHz [7] (20.0 dBm)
* 2447 MHz [8] (20.0 dBm)
* 2452 MHz [9] (20.0 dBm)
* 2457 MHz [10] (20.0 dBm)
* 2462 MHz [11] (20.0 dBm)
* 2467 MHz [12] (20.0 dBm)
* 2472 MHz [13] (20.0 dBm)
* 2484 MHz [14] (20.0 dBm)
Band 2:
Capabilities: 0x1062
HT20/HT40
Static SM Power Save
RX HT20 SGI
RX HT40 SGI
No RX STBC
Max AMSDU length: 3839 bytes
DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 16 usec (0x07)
HT TX/RX MCS rate indexes supported: 0-23
VHT Capabilities (0x0c025820):
Max MPDU length: 3895
Supported Channel Width: neither 160 nor 80+80
short GI (80 MHz)
SU Beamformer
SU Beamformee
VHT RX MCS set:
1 streams: MCS 0-9
2 streams: MCS 0-9
3 streams: MCS 0-9
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
VHT RX highest supported: 0 Mbps
VHT TX MCS set:
1 streams: MCS 0-9
2 streams: MCS 0-9
3 streams: MCS 0-9
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
VHT TX highest supported: 0 Mbps
Bitrates (non-HT):
* 6.0 Mbps
* 9.0 Mbps
* 12.0 Mbps
* 18.0 Mbps
* 24.0 Mbps
* 36.0 Mbps
* 48.0 Mbps
* 54.0 Mbps
Frequencies:
* 5170 MHz [34] (20.0 dBm)
* 5180 MHz [36] (20.0 dBm)
* 5190 MHz [38] (20.0 dBm)
* 5200 MHz [40] (20.0 dBm)
* 5210 MHz [42] (20.0 dBm)
* 5220 MHz [44] (20.0 dBm)
* 5230 MHz [46] (20.0 dBm)
* 5240 MHz [48] (20.0 dBm)
* 5260 MHz [52] (20.0 dBm)
* 5280 MHz [56] (20.0 dBm)
* 5300 MHz [60] (20.0 dBm)
* 5320 MHz [64] (20.0 dBm)
* 5500 MHz [100] (20.0 dBm)
* 5520 MHz [104] (20.0 dBm)
* 5540 MHz [108] (20.0 dBm)
* 5560 MHz [112] (20.0 dBm)
* 5580 MHz [116] (20.0 dBm)
* 5600 MHz [120] (20.0 dBm)
* 5620 MHz [124] (20.0 dBm)
* 5640 MHz [128] (20.0 dBm)
* 5660 MHz [132] (20.0 dBm)
* 5680 MHz [136] (20.0 dBm)
* 5700 MHz [140] (20.0 dBm)
* 5720 MHz [144] (20.0 dBm)
* 5745 MHz [149] (20.0 dBm)
* 5765 MHz [153] (20.0 dBm)
* 5785 MHz [157] (20.0 dBm)
* 5805 MHz [161] (20.0 dBm)
* 5825 MHz [165] (20.0 dBm)
Supported commands:
* new_interface
* set_interface
* new_key
* start_ap
* join_ibss
* set_pmksa
* del_pmksa
* flush_pmksa
* remain_on_channel
* frame
* set_wiphy_netns
* set_channel
* tdls_oper
* start_p2p_device
* connect
* disconnect
* crit_protocol_start
* crit_protocol_stop
* update_connect_params
Supported TX frame types:
* managed: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* AP: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* P2P-client: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* P2P-GO: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* P2P-device: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
Supported RX frame types:
* managed: 0x40 0xd0
* AP: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
* P2P-client: 0x40 0xd0
* P2P-GO: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
* P2P-device: 0x40 0xd0
WoWLAN support:
* wake up on disconnect
* wake up on magic packet
* wake up on pattern match, up to 8 patterns of 1-128 bytes,
maximum packet offset 1500 bytes
software interface modes (can always be added):
valid interface combinations:
* #{ managed } <= 1, #{ P2P-device } <= 1, #{ P2P-client, P2P-GO } <= 1,
total <= 3, #channels <= 2
* #{ managed } <= 1, #{ AP } <= 1, #{ P2P-client } <= 1, #{ P2P-device } <= 1,
total <= 4, #channels <= 1
Device supports scan flush.
Supported extended features:
* [ 4WAY_HANDSHAKE_STA_PSK ]: 4-way handshake with PSK in station mode
* [ 4WAY_HANDSHAKE_STA_1X ]: 4-way handshake with 802.1X in station modeThe SSID is 80MHz capable and advertising:
iw dev wlan0 scan ssid Velaar-R
BSS e0:cb:bc:30:11:b4(on wlan0) -- associated
last seen: 2186.261s [boottime]
TSF: 0 usec (0d, 00:00:00)
freq: 5180
beacon interval: 100 TUs
capability: ESS Privacy (0x0011)
signal: -54.00 dBm
last seen: 0 ms ago
SSID: Velaar-R
Supported rates: 6.0* 9.0 12.0* 18.0 24.0* 36.0 48.0 54.0
DS Parameter set: channel 36
Country: CA Environment: Indoor/Outdoor
Channels [36 - 48] @ 23 dBm
Channels [52 - 64] @ 24 dBm
Channels [100 - 116] @ 24 dBm
Channels [132 - 144] @ 24 dBm
Channels [149 - 165] @ 30 dBm
RSN: * Version: 1
* Group cipher: CCMP
* Pairwise ciphers: CCMP
* Authentication suites: PSK
* Capabilities: 16-PTKSA-RC 1-GTKSA-RC (0x000c)
BSS Load:
* station count: 4
* channel utilisation: 2/255
* available admission capacity: 0 [*32us]
HT capabilities:
Capabilities: 0x9ef
RX LDPC
HT20/HT40
SM Power Save disabled
RX HT20 SGI
RX HT40 SGI
TX STBC
RX STBC 1-stream
Max AMSDU length: 7935 bytes
No DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 8 usec (0x06)
HT TX/RX MCS rate indexes supported: 0-15
HT operation:
* primary channel: 36
* secondary channel offset: above
* STA channel width: any
* RIFS: 0
* 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
Extended capabilities:
* Extended Channel Switching
* Operating Mode Notification
* Max Number Of MSDUs In A-MSDU is unlimited
VHT capabilities:
VHT Capabilities (0x338819b2):
Max MPDU length: 11454
Supported Channel Width: neither 160 nor 80+80
RX LDPC
short GI (80 MHz)
TX STBC
SU Beamformer
SU Beamformee
MU Beamformer
RX antenna pattern consistency
TX antenna pattern consistency
VHT RX MCS set:
1 streams: MCS 0-9
2 streams: MCS 0-9
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
VHT RX highest supported: 0 Mbps
VHT TX MCS set:
1 streams: MCS 0-9
2 streams: MCS 0-9
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
VHT TX highest supported: 0 Mbps
VHT operation:
* channel width: 1 (80 MHz)
* center freq segment 1: 42
* center freq segment 2: 0
* VHT basic MCS set: 0xfffc
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 usecand yet
master ~ # iw wlan0 info
master ~ # iw wlan0 info
Interface wlan0
ifindex 3
wdev 0x1
addr a0:99:9b:03:c2:49
ssid Velaar-R
type managed
wiphy 0
channel 36 (5180 MHz), width: 40 MHz, center1: 5190 MHz
txpower 31.00 dBmAlso tried connecting to a different SSID on the other end of the spectrum:
Interface wlan0
ifindex 3
wdev 0x1
addr a0:99:9b:03:c2:49
ssid Velaar-AC3200_5G2
type managed
wiphy 0
channel 157 (5785 MHz), width: 40 MHz, center1: 5795 MHz
txpower 31.00 dBmStill 40MHz where SSID is 80MHz capable:
BSS 08:62:66:e5:17:88(on wlan0) -- associated
last seen: 2510.107s [boottime]
TSF: 0 usec (0d, 00:00:00)
freq: 5785
beacon interval: 100 TUs
capability: ESS Privacy RadioMeasure (0x1011)
signal: -57.00 dBm
last seen: 103980 ms ago
SSID: Velaar-AC3200_5G2
Supported rates: 6.0* 9.0 12.0* 18.0 24.0* 36.0 48.0 54.0
TIM: DTIM Count 0 DTIM Period 3 Bitmap Control 0x1 Bitmap[0] 0x0
RSN: * Version: 1
* Group cipher: CCMP
* Pairwise ciphers: CCMP
* Authentication suites: PSK
* Capabilities: 16-PTKSA-RC 1-GTKSA-RC (0x000c)
BSS Load:
* station count: 1
* channel utilisation: 5/255
* available admission capacity: 0 [*32us]
HT capabilities:
Capabilities: 0x1ef
RX LDPC
HT20/HT40
SM Power Save disabled
RX HT20 SGI
RX HT40 SGI
TX STBC
RX STBC 1-stream
Max AMSDU length: 3839 bytes
No DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 4 usec (0x05)
HT RX MCS rate indexes supported: 0-23
HT TX MCS rate indexes are undefined
HT operation:
* primary channel: 157
* 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
Extended capabilities:
* Extended Channel Switching
* Operating Mode Notification
* Max Number Of MSDUs In A-MSDU is unlimited
VHT capabilities:
VHT Capabilities (0x0f8259b2):
Max MPDU length: 11454
Supported Channel Width: neither 160 nor 80+80
RX LDPC
short GI (80 MHz)
TX STBC
SU Beamformer
SU Beamformee
VHT RX MCS set:
1 streams: MCS 0-9
2 streams: MCS 0-9
3 streams: MCS 0-9
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
VHT RX highest supported: 0 Mbps
VHT TX MCS set:
1 streams: MCS 0-9
2 streams: MCS 0-9
3 streams: MCS 0-9
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
VHT TX highest supported: 0 Mbps
VHT operation:
* channel width: 1 (80 MHz)
* center freq segment 1: 155
* center freq segment 2: 0
* VHT basic MCS set: 0x0000
WPS: * Version: 1.0
* Wi-Fi Protected Setup State: 2 (Configured)
* UUID: 5d521628-914a-b8b4-ebc6-739cbff54745
* RF Bands: 0x3
* Unknown TLV (0x1049, 6 bytes): 00 37 2a 00 01 20
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 Load:
* station count: 1
* channel utilisation: 7/255
* available admission capacity: 0 [*32us]
WPS: * Version: 1.0
* Wi-Fi Protected Setup State: 2 (Configured)
* Response Type: 3 (AP)
* UUID: 5d521628-914a-b8b4-ebc6-739cbff54745
* Manufacturer: ASUSTeK Computer Inc.
* Model: Wi-Fi Protected Setup Router
* Model Number: RT-AC3200
* Serial Number: 08:62:66:e5:17:80
* Primary Device Type: 6-0050f204-1
* Device name: RT-AC3200
* Config methods: Display
* RF Bands: 0x3
* Unknown TLV (0x1049, 6 bytes): 00 37 2a 00 01 20At a certain point, I thought that it might be an issue with antennas, but even connecting original MacBook Pro antennas result in the same behaviour.
Again, in Windows and MacOS I'm able to get the 80MHz working without hardware modifications.
It might be a firmware issue:
# pacman -Qi linux-firmware
Name : linux-firmware
Version : 20190313.efd2c1c-1But I wasn't able to find a way of using Windows or MacOS X firmware. (Have no idea where do they store the binary blobs for it.)
Any help is welcome 
Offline