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2Pug

Member

Registered: 2011-04-21

Posts: 17

[SOLVED] Wifi dead after update on my samsung laptop

My wifi started acting up a few weeks ago after one of my weekly updates. After some research I found that the issue was with the new version of wpa_supplicant(2.1-3) and downgrading it to 2.0 fixed it. This worked for a couple of weeks and then the wifi stopped working again; now my wifi won't work at all no matter what version I use. The wifi device is seen and loaded. I can bring up the device.

 wlp1s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN mode DORMANT group default qlen 1000
    link/ether b4:b6:76:36:b5:78 brd ff:ff:ff:ff:ff:ff

I can start wpa_supplicant:

[root@laptop /]# wpa_supplicant -B -i wlp1s0 -c /etc/wpa_supplicant.conf 
Successfully initialized wpa_supplicant

And the /var/run/wpa_supplicant/wlp1s0 file is there.

But dhcp doesn't seem to want to start:

[root@laptop /]# dhcpcd wlp1s0
dhcpcd[3544]: sending commands to master dhcpcd process

iw will give me this:

[root@laptop work]# iw dev
phy#0
        Interface wlp1s0
                ifindex 3
                wdev 0x1
                addr b4:b6:76:36:b5:78
                type managed

If I scan the device (not sure way it took a couple of tries, and I removed all the other ssid's to just show the one that I'm trying to connect to):

[root@laptop work]# iw dev wlp1s0 scan
command failed: Device or resource busy (-16)
[root@laptop work]# iw dev wlp1s0 scan
command failed: Device or resource busy (-16)
[root@laptop work]# iw dev wlp1s0 scan
BSS d0:57:85:ac:9e:67(on wlp1s0)
        TSF: 7581472930 usec (0d, 02:06:21)
        freq: 2437
        beacon interval: 100 TUs
        capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
        signal: -27.00 dBm
        last seen: 0 ms ago
        Information elements from Probe Response frame:
        SSID: Verizon-291LVW-9E67
        Supported rates: 1.0* 2.0* 5.5* 6.0 9.0 11.0* 12.0 18.0 
        DS Parameter set: channel 6
        Country: US     Environment: bogus
                Channels [1 - 11] @ 27 dBm
        ERP: <no flags>
        Extended supported rates: 24.0 36.0 48.0 54.0 
        HT capabilities:
                Capabilities: 0x2c
                        HT20
                        SM Power Save disabled
                        RX HT20 SGI
                        No RX STBC
                        Max AMSDU length: 3839 bytes
                        No DSSS/CCK HT40
                Maximum RX AMPDU length 8191 bytes (exponent: 0x000)
                Minimum RX AMPDU time spacing: No restriction (0x00)
                HT RX MCS rate indexes supported: 0-7
                HT TX MCS rate indexes are undefined
        HT operation:
                 * primary channel: 6
                 * secondary channel offset: no secondary
                 * STA channel width: 20 MHz
                 * RIFS: 0
                 * HT protection: nonmember
                 * 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: TKIP
                 * Pairwise ciphers: CCMP TKIP
                 * Authentication suites: PSK
        RSN:     * Version: 1
                 * Group cipher: TKIP
                 * Pairwise ciphers: CCMP TKIP
                 * Authentication suites: PSK
                 * Capabilities: 16-PTKSA-RC 1-GTKSA-RC (0x000c)
        WMM:     * Parameter version 1
                 * 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)
                 * Response Type: 3 (AP)
                 * UUID: a3df0299-4e5c-59f1-9678-b91acdec9656
                 * Manufacturer:  
                 * Model:  
                 * Model Number:  
                 * Serial Number:  
                 * Primary Device Type: 0-00000000-0
                 * Device name:  
                 * Config methods: Label, Display, PBC, Keypad
                 * Unknown TLV (0x1049, 6 bytes): 00 37 2a 00 01 20

Kind of stuck now and not really sure what else I can do. Wifi-menu won't connect either but that seems to be because it brings the wifi connection down ??? Since wpa_supplicant seems to be working now, I kept the update and all packages are updated. I always run 'pacman -Syu' during an update so all the packages should be correct.

Edit: Solution
Ok, I was messing around with this some more and found that if I replaced /etc/wpa_supplicant/wpa_supplicant.conf with the one that I already had in /etc/wpa_supplicant.conf it started to work. I'm not sure when it stopped looking at /etc/wpa_supplicant.conf and started looking at /etc/wpa_supplicant/wpa_supplicant.conf but that seemed to be the issue.... even though, before this, I couldn't even connect to an open network. Anyway, that 'seemed' to be to issue in this case.

Last edited by 2Pug (2014-04-11 01:32:30)

rhenvar

Member

Registered: 2014-03-12

Posts: 9

Re: [SOLVED] Wifi dead after update on my samsung laptop

Try connecting to an unsecured network to make sure that there's nothing wrong with the device itself or the driver

iwconfig device essid "my essid"

2Pug

Member

Registered: 2011-04-21

Posts: 17

Re: [SOLVED] Wifi dead after update on my samsung laptop

I have two wifi hotspots that worked before the update and now both fail to connect after the update. There are no open spots around me and I don't want to open one here because it's alloted only a tiny amount of data and people would be swallowing it up the minute I opened it. I'll try it once I get home though but I would think, if it was a wpa issue, wpa_supplicant would have failed and it didn't.