Debugging WiFi problems in a Dell Precision M4800

kaltorak · 2017-07-01 23:02:20

Hi archers, I have a Dell Precision M4800 running Arch Linux x86_64, almost everything works fine but I have really annoying problems with the wireless interface, and the worst part is that I have no idea of how can I debug wireless connections.

The problem is that sometimes (not always), I just can't connect to any wireless access point, no matter if it is my home router a TP-Link, or my cellphone hotstop, or a the ubiquity in some enterprise. there are moments that it just doesn't work and I understand the cause, but the solution happen to be reboot the system, and that really sucks.

But is not systematic, I mean is not after some time X, or after turning off and on the wireless switch, or after suspend. Sometime I just turn on the computer and the wireless doesn't work and I have to reboot the machine.

But when the connection works, there is no problem if for example I suspend then reactivate the machine, I absolutely can reconnect to any wireless network and everything is fine.

I am using NetworkManager, and whenever this problem appears, NM always ask me for the wireless password, or start a trying to reconnect loop with password-less wifi(es).

If you have some ideas of how can I start to debug this problem I will really appreciate, because right now I just can't found NetworkManager logs or trying to do the wireless connection in a manual way like using the commands ip or ifconfig. Any ideas will be very helpful

For now I have this information

My hardware info selon lspci

    03:00.0 Network controller: Intel Corporation Wireless 7260 (rev 73)
    	Subsystem: Intel Corporation Dual Band Wireless-AC 7260
    	Kernel driver in use: iwlwifi
    	Kernel modules: iwlwifi

The Firmware line in dmesg

     [    3.660674] iwlwifi 0000:03:00.0: loaded firmware version 17.459231.0 op_mode iwlmvm

And some repeated lines in dmesg

[  596.060311] iwlwifi 0000:03:00.0: Failed to find station
[  596.060317] wifi0: failed to remove key (1, ff:ff:ff:ff:ff:ff) from hardware (-22)
[  596.068588] IPv6: ADDRCONF(NETDEV_UP): wifi0: link is not ready
[  596.103175] IPv6: ADDRCONF(NETDEV_UP): wifi0: link is not ready
[  599.486002] wifi0: authenticate with 64:66:b3:4b:bb:9c
[  599.488559] wifi0: send auth to 64:66:b3:4b:bb:9c (try 1/3)
[  599.491588] wifi0: authenticated
[  600.102713] iwlwifi 0000:03:00.0: No association and the time event is over already...
[  600.102735] wifi0: Connection to AP 64:66:b3:4b:bb:9c lost
[  604.494226] wifi0: aborting authentication with 64:66:b3:4b:bb:9c by local choice (Reason: 3=DEAUTH_LEAVING)
[  608.003878] wifi0: authenticate with 64:66:b3:4b:bb:9c
[  608.006615] wifi0: send auth to 64:66:b3:4b:bb:9c (try 1/3)
[  608.009466] wifi0: authenticated
[  608.620856] iwlwifi 0000:03:00.0: No association and the time event is over already...
[  608.620920] wifi0: Connection to AP 64:66:b3:4b:bb:9c lost
[  613.012202] wifi0: aborting authentication with 64:66:b3:4b:bb:9c by local choice (Reason: 3=DEAUTH_LEAVING)
[  616.923878] wifi0: authenticate with 64:66:b3:4b:bb:9c
[  616.926493] wifi0: send auth to 64:66:b3:4b:bb:9c (try 1/3)
[  616.929554] wifi0: authenticated
[  617.541291] iwlwifi 0000:03:00.0: No association and the time event is over already...
[  617.541304] wifi0: Connection to AP 64:66:b3:4b:bb:9c lost
[  621.063137] wifi0: aborting authentication with 64:66:b3:4b:bb:9c by local choice (Reason: 3=DEAUTH_LEAVING)

jasonwryan · 2017-07-01 23:13:43

Journal entry for a failed connection...

Arch Linux

#1 2017-07-01 23:02:20

Debugging WiFi problems in a Dell Precision M4800

#2 2017-07-01 23:13:43

Re: Debugging WiFi problems in a Dell Precision M4800

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