[rt2x00-users] Linksys WUSB600N v1 disconnecting from AP

Aleksandar Milivojevic alex at milivojevic.org
Wed Jan 5 06:32:16 EST 2011


On Tue, Jan 4, 2011 at 11:01 AM, Luis Correia <buga at loide.net> wrote:

> Hi all,
>
> On Tue, Jan 4, 2011 at 18:46, Helmut Schaa <helmut.schaa at googlemail.com>
> wrote:
> > Hi Aleksandar,
> >
> > looks like a somewhat strange regulatory handling. However, I'm not
> really
> > familiar with the regulatory stuff. Maybe Luis can give us some
> info/ideas
> > regarding this ...
> >
> > Luis, mind to have a look at the regulatory messages below?
> >
>
> Yes, there is something fishy with it.
>
> this is what is allowed for Ireland
>
> country IE:
>        (2402 - 2482 @ 40), (N/A, 20)
>        (5170 - 5250 @ 40), (N/A, 20)
>        (5250 - 5330 @ 40), (N/A, 20), DFS
>        (5490 - 5710 @ 40), (N/A, 27), DFS
>
>
> Apparently IE Ireland does allow 5Ghz channels, and something is
> really strange is going on.
>
> Maybe if the Airport Extreme was changed to a new channel, it would
> improve.
>
> But I'm not totally sure.
>
> We might also be looking at an old regulatory daemon or database.
>

The way I read the debug log file was that IE was an empty string (I would
expect to see "Received country IE: XX", not "Received country IE:".  Also,
my regulatory domain is US, not Ireland.  I double-checked settings in my
Airport Extreme router, and it is correctly set to US there.  Looking into
the messages log file, it correctly shows country as US as well ("cfg80211:
Regulatory domain: US").

Luis Correia
> > Am Dienstag, 4. Januar 2011 schrieb Aleksandar Milivojevic:
> >> I've searched around a bit and haven't found much information that looks
> >> like the problem I'm experiencing with rt2x00 drivers.
> >>
> >> The hardware I have is Linksys WUSB600N USB stick, v1 hardware revision,
> >> which should have RT2870 chipset.  The kernel used is from a generic
> Ubuntu
> >> 10.10 distribution (uname shows "Linux toporko 2.6.35-24-generic
> #42-Ubuntu
> >> SMP Thu Dec 2 01:41:57 UTC 2010 i686 GNU/Linux").  The output of lsusb
> >> identifies device as:
> >>
> >> Bus 001 Device 003: ID 1737:0071 Linksys WUSB600N Dual-Band Wireless-N
> USB
> >> Network Adapter
> >>
> >> The problem I'm experiencing is that I'm able to connect to my AP (an
> Apple
> >> Airport Extreme operating at 5GHZ) shortly after boot.  However, shortly
> >> after connection is made (usually within few minutes), the connection is
> >> dropped, and all subsequent attempts to re-connect to AP fail.
>  Reloading
> >> the driver helps to reconnect, but connection is again dropped after few
> >> minutes.  I also have another AP (an old Linksys WRT54G) operating on
> >> 2.4GHz, and it seems same issue is present if I attempt to connect to it
> >> (haven't experimented with this other setup much, as I'm much more
> >> interested in connecting to my WiFi-N network).
> >>
> >> The list of relevant loaded drivers on the system shows (looking for
> >> anything starting with 'rt' in the name):
> >> rt2800usb               8367  0
> >> rt2800lib              28897  1 rt2800usb
> >> rt2x00usb               9779  2 rt2800usb,rt2800lib
> >> rt2x00lib              27275  2 rt2800lib,rt2x00usb
> >> led_class               2633  1 rt2x00lib
> >> mac80211              231541  2 rt2x00usb,rt2x00lib
> >> cfg80211              144470  2 rt2x00lib,mac80211
> >>
> >> I have rt2870sta driver blacklisted to prevent it from conflicting with
> >> rt2x00 drivers.
> >>
> >> Looking at the log files, it seems /var/log/messages and /var/log/debug
> >> contain most interesting logs.
> >>
> >> I found following snippet in /var/log/messages:
> >>
> >> Jan  3 10:39:38 toporko kernel: [   70.143600] ADDRCONF(NETDEV_CHANGE):
> >> wlan0: link becomes ready
> >> Jan  3 10:39:38 toporko kernel: [   70.143712] cfg80211: Calling CRDA
> for
> >> country: US
> >> Jan  3 10:39:38 toporko kernel: [   70.219910] cfg80211: Regulatory
> domain:
> >> US
> >> Jan  3 10:39:38 toporko kernel: [   70.219914]     (start_freq -
> end_freq @
> >> bandwidth), (max_antenna_gain, max_eirp)
> >> Jan  3 10:39:38 toporko kernel: [   70.219918]     (5170000 KHz -
> 5250000
> >> KHz @ 40000 KHz), (10000 mBi, 3000 mBm)
> >> Jan  3 10:39:38 toporko kernel: [   70.219923]     (5735000 KHz -
> 5835000
> >> KHz @ 40000 KHz), (10000 mBi, 3000 mBm)
> >> Jan  3 10:39:38 toporko kernel: [   70.219928] cfg80211: Regulatory
> domain:
> >> US
> >> Jan  3 10:39:38 toporko kernel: [   70.219930]     (start_freq -
> end_freq @
> >> bandwidth), (max_antenna_gain, max_eirp)
> >> Jan  3 10:39:38 toporko kernel: [   70.219935]     (2402000 KHz -
> 2472000
> >> KHz @ 40000 KHz), (300 mBi, 2700 mBm)
> >> Jan  3 10:39:38 toporko kernel: [   70.219939]     (5170000 KHz -
> 5250000
> >> KHz @ 40000 KHz), (300 mBi, 1700 mBm)
> >> Jan  3 10:39:38 toporko kernel: [   70.219943]     (5250000 KHz -
> 5330000
> >> KHz @ 40000 KHz), (300 mBi, 2000 mBm)
> >> Jan  3 10:39:38 toporko kernel: [   70.219947]     (5490000 KHz -
> 5600000
> >> KHz @ 40000 KHz), (300 mBi, 2000 mBm)
> >> Jan  3 10:39:38 toporko kernel: [   70.219951]     (5650000 KHz -
> 5710000
> >> KHz @ 40000 KHz), (300 mBi, 2000 mBm)
> >> Jan  3 10:39:38 toporko kernel: [   70.219955]     (5735000 KHz -
> 5835000
> >> KHz @ 40000 KHz), (300 mBi, 3000 mBm)
> >> Jan  3 10:39:38 toporko kernel: [   70.219960] cfg80211: Regulatory
> domain:
> >> 98
> >> Jan  3 10:39:38 toporko kernel: [   70.219962]     (start_freq -
> end_freq @
> >> bandwidth), (max_antenna_gain, max_eirp)
> >> Jan  3 10:39:38 toporko kernel: [   70.219966]     (5170000 KHz -
> 5250000
> >> KHz @ 40000 KHz), (300 mBi, 1700 mBm)
> >> Jan  3 10:39:38 toporko kernel: [   70.219971]     (5735000 KHz -
> 5835000
> >> KHz @ 40000 KHz), (300 mBi, 3000 mBm)
> >> Jan  3 10:39:38 toporko kernel: [   70.220189] cfg80211: Current
> regulatory
> >> domain updated by AP to: US
> >> Jan  3 10:39:38 toporko kernel: [   70.220192]     (start_freq -
> end_freq @
> >> bandwidth), (max_antenna_gain, max_eirp)
> >> Jan  3 10:39:38 toporko kernel: [   70.220196]     (5170000 KHz -
> 5250000
> >> KHz @ 40000 KHz), (300 mBi, 1700 mBm)
> >> Jan  3 10:39:38 toporko kernel: [   70.220200]     (5735000 KHz -
> 5835000
> >> KHz @ 40000 KHz), (300 mBi, 3000 mBm)
> >> Jan  3 10:39:38 toporko kernel: [   70.409801] padlock: VIA PadLock not
> >> detected.
> >> Jan  3 10:40:20 toporko kernel: [  112.656632] lo: Disabled Privacy
> >> Extensions
> >> Jan  3 10:41:31 toporko kernel: [  183.593983] cfg80211: Calling CRDA to
> >> update world regulatory domain
> >> Jan  3 10:41:31 toporko kernel: [  183.625264] cfg80211: World
> regulatory
> >> domain updated:
> >> Jan  3 10:41:31 toporko kernel: [  183.625272]     (start_freq -
> end_freq @
> >> bandwidth), (max_antenna_gain, max_eirp)
> >> Jan  3 10:41:31 toporko kernel: [  183.625277]     (2402000 KHz -
> 2472000
> >> KHz @ 40000 KHz), (300 mBi, 2000 mBm)
> >> Jan  3 10:41:31 toporko kernel: [  183.625282]     (2457000 KHz -
> 2482000
> >> KHz @ 20000 KHz), (300 mBi, 2000 mBm)
> >> Jan  3 10:41:31 toporko kernel: [  183.625286]     (2474000 KHz -
> 2494000
> >> KHz @ 20000 KHz), (300 mBi, 2000 mBm)
> >> Jan  3 10:41:31 toporko kernel: [  183.625290]     (5170000 KHz -
> 5250000
> >> KHz @ 40000 KHz), (300 mBi, 2000 mBm)
> >> Jan  3 10:41:31 toporko kernel: [  183.625294]     (5735000 KHz -
> 5835000
> >> KHz @ 40000 KHz), (300 mBi, 2000 mBm)
> >>
> >>
> >> I also found similar snippet in /var/log/debug.  Interestingly, unlike
> the
> >> one above that lists IE as US (which is correct for my location, and
> >> corresponds to the settings in my AP), in debug log file IE is strangely
> >> blank with bunch of lines about disabled frequencies:
> >>
> >> Jan  3 10:39:38 toporko kernel: [   70.114337] wlan0: authenticate with
> >> 00:1e:52:79:e9:ff (try 1)
> >> Jan  3 10:39:38 toporko kernel: [   70.114955] wlan0: authenticated
> >> Jan  3 10:39:38 toporko kernel: [   70.118103] wlan0: associate with
> >> 00:1e:52:79:e9:ff (try 1)
> >> Jan  3 10:39:38 toporko kernel: [   70.119214] wlan0: RX AssocResp from
> >> 00:1e:52:79:e9:ff (capab=0x511 status=0 aid=1)
> >> Jan  3 10:39:38 toporko kernel: [   70.119220] wlan0: associated
> >> Jan  3 10:39:38 toporko kernel: [   70.219901] cfg80211: Received
> country
> >> IE:
> >> Jan  3 10:39:38 toporko kernel: [   70.219925] cfg80211: CRDA thinks
> this
> >> should applied:
> >> Jan  3 10:39:38 toporko kernel: [   70.219957] cfg80211: We intersect
> both
> >> of these and get:
> >> Jan  3 10:39:38 toporko kernel: [   70.219977] cfg80211: Leaving channel
> >> 2412 MHz intact on phy0 - no rule found in band on Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.219981] cfg80211: Leaving channel
> >> 2417 MHz intact on phy0 - no rule found in band on Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.219985] cfg80211: Leaving channel
> >> 2422 MHz intact on phy0 - no rule found in band on Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.219988] cfg80211: Leaving channel
> >> 2427 MHz intact on phy0 - no rule found in band on Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.219992] cfg80211: Leaving channel
> >> 2432 MHz intact on phy0 - no rule found in band on Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220044] cfg80211: Leaving channel
> >> 2437 MHz intact on phy0 - no rule found in band on Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220048] cfg80211: Leaving channel
> >> 2442 MHz intact on phy0 - no rule found in band on Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220052] cfg80211: Leaving channel
> >> 2447 MHz intact on phy0 - no rule found in band on Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220056] cfg80211: Leaving channel
> >> 2452 MHz intact on phy0 - no rule found in band on Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220059] cfg80211: Leaving channel
> >> 2457 MHz intact on phy0 - no rule found in band on Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220063] cfg80211: Leaving channel
> >> 2462 MHz intact on phy0 - no rule found in band on Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220066] cfg80211: Leaving channel
> >> 2467 MHz intact on phy0 - no rule found in band on Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220070] cfg80211: Leaving channel
> >> 2472 MHz intact on phy0 - no rule found in band on Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220073] cfg80211: Leaving channel
> >> 2484 MHz intact on phy0 - no rule found in band on Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220078] cfg80211: Disabling
> channel
> >> 5260 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220081] cfg80211: Disabling
> channel
> >> 5270 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220084] cfg80211: Disabling
> channel
> >> 5280 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220087] cfg80211: Disabling
> channel
> >> 5300 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220091] cfg80211: Disabling
> channel
> >> 5310 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220094] cfg80211: Disabling
> channel
> >> 5320 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220097] cfg80211: Disabling
> channel
> >> 5500 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220100] cfg80211: Disabling
> channel
> >> 5510 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220103] cfg80211: Disabling
> channel
> >> 5520 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220106] cfg80211: Disabling
> channel
> >> 5540 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220109] cfg80211: Disabling
> channel
> >> 5550 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220113] cfg80211: Disabling
> channel
> >> 5560 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220116] cfg80211: Disabling
> channel
> >> 5580 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220119] cfg80211: Disabling
> channel
> >> 5590 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220122] cfg80211: Disabling
> channel
> >> 5600 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220125] cfg80211: Disabling
> channel
> >> 5620 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220128] cfg80211: Disabling
> channel
> >> 5630 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220131] cfg80211: Disabling
> channel
> >> 5640 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220135] cfg80211: Disabling
> channel
> >> 5660 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220138] cfg80211: Disabling
> channel
> >> 5670 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220141] cfg80211: Disabling
> channel
> >> 5680 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220144] cfg80211: Disabling
> channel
> >> 5700 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220148] cfg80211: Disabling
> channel
> >> 5835 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220151] cfg80211: Disabling
> channel
> >> 5845 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220154] cfg80211: Disabling
> channel
> >> 5855 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220157] cfg80211: Disabling
> channel
> >> 5865 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220160] cfg80211: Disabling
> channel
> >> 5920 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220163] cfg80211: Disabling
> channel
> >> 5940 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220167] cfg80211: Disabling
> channel
> >> 5960 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220170] cfg80211: Disabling
> channel
> >> 5980 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220173] cfg80211: Disabling
> channel
> >> 6040 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220176] cfg80211: Disabling
> channel
> >> 6060 MHz on phy0 due to Country IE
> >> Jan  3 10:39:38 toporko kernel: [   70.220179] cfg80211: Disabling
> channel
> >> 6080 MHz on phy0 due to Country IE
> >> Jan  3 10:41:31 toporko kernel: [  183.564046] No probe response from AP
> >> 00:1e:52:79:e9:ff after 500ms, disconnecting.
> >> Jan  3 10:41:31 toporko kernel: [  183.593968] cfg80211: All devices are
> >> disconnected, going to restore regulatory settings
> >> Jan  3 10:41:31 toporko kernel: [  183.593977] cfg80211: Restoring
> >> regulatory settings
> >> Jan  3 10:41:34 toporko kernel: [  186.856369] wlan0: authenticate with
> >> 00:1e:52:79:e9:ff (try 1)
> >> Jan  3 10:41:34 toporko kernel: [  187.056156] wlan0: authenticate with
> >> 00:1e:52:79:e9:ff (try 2)
> >> Jan  3 10:41:35 toporko kernel: [  187.256419] wlan0: authenticate with
> >> 00:1e:52:79:e9:ff (try 3)
> >> Jan  3 10:41:35 toporko kernel: [  187.456054] wlan0: authentication
> with
> >> 00:1e:52:79:e9:ff timed out
> >> Jan  3 10:41:47 toporko kernel: [  200.054031] wlan0: direct probe to
> >> 00:1e:52:79:e9:ff (try 1)
> >> Jan  3 10:41:48 toporko kernel: [  200.252050] wlan0: direct probe to
> >> 00:1e:52:79:e9:ff (try 2)
> >> Jan  3 10:41:48 toporko kernel: [  200.452085] wlan0: direct probe to
> >> 00:1e:52:79:e9:ff (try 3)
> >
> > We received an empty country IE and as a result disabled serveral 11a
> channels.
> > Maybe even the one we are currently associated to?
> >
> > Thanks,
> > Helmut
> >
> > _______________________________________________
> > users mailing list
> > users at rt2x00.serialmonkey.com
> >
> http://rt2x00.serialmonkey.com/mailman/listinfo/users_rt2x00.serialmonkey.com
> >
>
> _______________________________________________
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>
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