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? 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 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
