[rt2x00-users] Linksys WUSB600N v1 disconnecting from AP

Luis R. Rodriguez lrodriguez at atheros.com
Fri Jan 7 13:44:32 EST 2011


On Thu, Jan 06, 2011 at 08:31:22AM -0800, Aleksandar Milivojevic wrote:
> Playing with it a bit more this morning.  Looks like the connection
> from wireless adapter to my AP drops periodically.  Sometimes it
> recovers (sometimes after several attempts), sometimes it does not.
> Seems to be very random:
> 
> # egrep 'authent|associat' /var/log/debug
> Jan  6 08:00:54 toporko kernel: [   47.570810] wlan0: authenticate
> with 00:1e:52:79:e9:ff (try 1)
> Jan  6 08:00:54 toporko kernel: [   47.571321] wlan0: authenticated
> Jan  6 08:00:56 toporko kernel: [   49.174175] wlan0: associate with
> 00:1e:52:79:e9:ff (try 1)
> Jan  6 08:00:56 toporko kernel: [   49.175536] wlan0: associated
> Jan  6 08:06:01 toporko kernel: [  354.230874] wlan0: authenticate
> with 00:1e:52:79:e9:ff (try 1)
> Jan  6 08:06:01 toporko kernel: [  354.231364] wlan0: authenticated
> Jan  6 08:06:01 toporko kernel: [  354.236066] wlan0: associate with
> 00:1e:52:79:e9:ff (try 1)
> Jan  6 08:06:01 toporko kernel: [  354.236865] wlan0: associated
> Jan  6 08:09:36 toporko kernel: [  569.868923] wlan0: authenticate
> with 00:1e:52:79:e9:ff (try 1)
> Jan  6 08:09:36 toporko kernel: [  569.869416] wlan0: authenticated
> Jan  6 08:09:36 toporko kernel: [  569.873736] wlan0: associate with
> 00:1e:52:79:e9:ff (try 1)
> Jan  6 08:09:36 toporko kernel: [  569.874507] wlan0: associated
> Jan  6 08:09:46 toporko kernel: [  579.233563] wlan0: authenticate
> with 00:1e:52:79:e9:ff (try 1)
> Jan  6 08:09:46 toporko kernel: [  579.235574] wlan0: authenticated
> Jan  6 08:09:46 toporko kernel: [  579.240737] wlan0: associate with
> 00:1e:52:79:e9:ff (try 1)
> Jan  6 08:09:46 toporko kernel: [  579.241518] wlan0: associated
> Jan  6 08:09:57 toporko kernel: [  590.830933] wlan0: authenticate
> with 00:1e:52:79:e9:ff (try 1)
> Jan  6 08:09:57 toporko kernel: [  590.831435] wlan0: authenticated
> Jan  6 08:09:57 toporko kernel: [  590.839102] wlan0: associate with
> 00:1e:52:79:e9:ff (try 1)
> Jan  6 08:09:57 toporko kernel: [  590.839881] wlan0: associated
> Jan  6 08:21:29 toporko kernel: [ 1282.823289] wlan0: authenticate
> with 00:1e:52:79:e9:ff (try 1)
> Jan  6 08:21:29 toporko kernel: [ 1282.823783] wlan0: authenticated
> Jan  6 08:21:29 toporko kernel: [ 1282.828990] wlan0: associate with
> 00:1e:52:79:e9:ff (try 1)
> Jan  6 08:21:29 toporko kernel: [ 1282.830132] wlan0: associated
> Jan  6 08:25:30 toporko kernel: [ 1523.433931] wlan0: authenticate
> with 00:1e:52:79:e9:ff (try 1)
> Jan  6 08:25:30 toporko kernel: [ 1523.434930] wlan0: authenticated
> Jan  6 08:25:30 toporko kernel: [ 1523.439868] wlan0: associate with
> 00:1e:52:79:e9:ff (try 1)
> Jan  6 08:25:30 toporko kernel: [ 1523.440652] wlan0: associated
> 
> So far, it managed to re-connect every time.  Though, I'm rather sure
> if I leave it long enough, the last night's case of connection dropped
> completely would repeat sooner or later (even last night, there were
> some connect/disconnect events before connection was dropped
> permanently).
> 
> The AP reports signal from wireless card between -70 and -75dB, noise
> at -96dB, and speed at 120mbps (with occasional drop to 45mbps).
> These numbers sound about OK for the location (on the other side of my
> apartment, few walls in between).  For comparison, if I position my
> MacBook at same location (right next to my Linux box), AP reports
> signal from its AirPort card at about -60dB and speed in about 100mbps
> range and no drops.

The Linux regulatory code only relies on the Country IE from the AP you
decide to associate to, that's it. Then, as for all the regulatory stuff
popping out once you are associated, its happening because as I see it
you are being disconnected from the AP. The Linux regulatory code will
reset the regulatory settings after you disconnect from an AP.

The disconnect issues should not be regularory related from what I see.
Seems like a general disconnect issue with your driver.

  Luis



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