I'm using TP-LINK TL-WN821N and encountering very annoying behaviour - adapter 'hangs' at random period of time - sometimes it is 1 hour, sometimes 2. After it hangs Network manager does not see any wireless networks and the only way to make it work is to reboot system (also tried unplugging/plugging adapter and removing/adding module but it did not work) Heres lsusb -v: Bus 004 Device 004: ID 0cf3:1002 Atheros Communications, Inc. TP-Link TL-WN821N v2 / TL-WN822N v1 802.11n [Atheros AR9170] And here what i have in syslog right before the hang: Feb 28 01:23:45 evren kernel: [ 3590.458890] ------------[ cut here ]------------ Feb 28 01:23:45 evren kernel: [ 3590.458919] WARNING: CPU: 0 PID: 3749 at /build/linux-PoTihC/linux-4.2.0/drivers/net/wireless/ath/carl9170/main.c:1012 carl9170_op_configure_filter+0x191/0x1a0 [carl9170]() Feb 28 01:23:45 evren kernel: [ 3590.458925] Modules linked in: drbg ansi_cprng ctr ccm binfmt_misc fglrx(POE) arc4 snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi carl9170 snd_hda_intel snd_hda_codec snd_hda_core ath mac80211 snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event cfg80211 kvm_amd kvm snd_rawmidi snd_seq input_leds joydev snd_seq_device snd_timer edac_core serio_raw edac_mce_amd snd soundcore k10temp asus_atk0110 amd_iommu_v2 8250_fintek i2c_piix4 shpchp mac_hid cuse parport_pc ppdev lp parport autofs4 pata_acpi hid_generic usbhid hid r8169 psmouse pata_jmicron firewire_ohci mii firewire_core pata_atiixp crc_itu_t ahci libahci wmi Feb 28 01:23:45 evren kernel: [ 3590.459018] CPU: 0 PID: 3749 Comm: kworker/u16:0 Tainted: P W OE 4.2.0-30-generic #36-Ubuntu Feb 28 01:23:45 evren kernel: [ 3590.459024] Hardware name: System manufacturer System Product Name/M4A89GTD-PRO/USB3, BIOS 3029 07/05/2012 Feb 28 01:23:45 evren kernel: [ 3590.459063] Workqueue: phy1 ieee80211_reconfig_filter [mac80211] Feb 28 01:23:45 evren kernel: [ 3590.459068] 0000000000000000 00000000d9cf9215 ffff8800b240fce8 ffffffff817ebf13 Feb 28 01:23:45 evren kernel: [ 3590.459075] 0000000000000000 0000000000000000 ffff8800b240fd28 ffffffff8107b9d6 Feb 28 01:23:45 evren kernel: [ 3590.459082] 8000000000000001 ffff8800c88b5440 ffff8800b240fdac 8000000000000001 Feb 28 01:23:45 evren kernel: [ 3590.459089] Call Trace: Feb 28 01:23:45 evren kernel: [ 3590.459102] [<ffffffff817ebf13>] dump_stack+0x45/0x57 Feb 28 01:23:45 evren kernel: [ 3590.459112] [<ffffffff8107b9d6>] warn_slowpath_common+0x86/0xc0 Feb 28 01:23:45 evren kernel: [ 3590.459120] [<ffffffff8107bb0a>] warn_slowpath_null+0x1a/0x20 Feb 28 01:23:45 evren kernel: [ 3590.459130] [<ffffffffc0426c71>] carl9170_op_configure_filter+0x191/0x1a0 [carl9170] Feb 28 01:23:45 evren kernel: [ 3590.459163] [<ffffffffc0373939>] ieee80211_configure_filter+0x149/0x2a0 [mac80211] Feb 28 01:23:45 evren kernel: [ 3590.459196] [<ffffffffc0373aa5>] ieee80211_reconfig_filter+0x15/0x20 [mac80211] Feb 28 01:23:45 evren kernel: [ 3590.459205] [<ffffffff810947aa>] process_one_work+0x1aa/0x440 Feb 28 01:23:45 evren kernel: [ 3590.459213] [<ffffffff81094a8b>] worker_thread+0x4b/0x4c0 Feb 28 01:23:45 evren kernel: [ 3590.459221] [<ffffffff81094a40>] ? process_one_work+0x440/0x440 Feb 28 01:23:45 evren kernel: [ 3590.459228] [<ffffffff8109ae28>] kthread+0xd8/0xf0 Feb 28 01:23:45 evren kernel: [ 3590.459236] [<ffffffff8109ad50>] ? kthread_create_on_node+0x1f0/0x1f0 Feb 28 01:23:45 evren kernel: [ 3590.459243] [<ffffffff817f319f>] ret_from_fork+0x3f/0x70 Feb 28 01:23:45 evren kernel: [ 3590.459249] [<ffffffff8109ad50>] ? kthread_create_on_node+0x1f0/0x1f0 Feb 28 01:23:45 evren kernel: [ 3590.459255] ---[ end trace fe0c60ee5cb8db9a ]--- Feb 28 01:23:46 evren kernel: [ 3591.459129] ------------[ cut here ]------------ Following messages are also relevant to adapter failure but i guess it will be to long to post it here. Also after unplugging/pluggin i see following: Feb 28 01:46:44 evren kernel: [ 4970.256337] usb 4-1.4: USB disconnect, device number 13 Feb 28 01:46:52 evren kernel: [ 4977.878803] usb 4-1.4: new high-speed USB device number 14 using ehci-pci Feb 28 01:46:52 evren kernel: [ 4978.023152] usb 4-1.4: New USB device found, idVendor=0cf3, idProduct=1002 Feb 28 01:46:52 evren kernel: [ 4978.023166] usb 4-1.4: New USB device strings: Mfr=16, Product=32, SerialNumber=48 Feb 28 01:46:52 evren kernel: [ 4978.023173] usb 4-1.4: Product: USB2.0 WLAN Feb 28 01:46:52 evren kernel: [ 4978.023179] usb 4-1.4: Manufacturer: ATHER Feb 28 01:46:52 evren kernel: [ 4978.023185] usb 4-1.4: SerialNumber: 12345 Feb 28 01:46:52 evren kernel: [ 4978.098854] usb 4-1.4: reset high-speed USB device number 14 using ehci-pci Feb 28 01:46:52 evren kernel: [ 4978.232174] usb 4-1.4: driver API: 1.9.7 2012-12-15 [1-1] Feb 28 01:46:52 evren kernel: [ 4978.232187] usb 4-1.4: firmware API: 1.9.6 2012-07-07 Feb 28 01:46:52 evren kernel: [ 4978.569953] ath: EEPROM regdomain: 0x809c Feb 28 01:46:52 evren kernel: [ 4978.569962] ath: EEPROM indicates we should expect a country code Feb 28 01:46:52 evren kernel: [ 4978.569967] ath: doing EEPROM country->regdmn map search Feb 28 01:46:52 evren kernel: [ 4978.569971] ath: country maps to regdmn code: 0x52 Feb 28 01:46:52 evren kernel: [ 4978.569975] ath: Country alpha2 being used: CN Feb 28 01:46:52 evren kernel: [ 4978.569980] ath: Regpair used: 0x52 Feb 28 01:46:52 evren kernel: [ 4978.570407] ieee80211 phy1: Selected rate control algorithm 'minstrel_ht' Feb 28 01:46:25 evren wpa_supplicant[835]: message repeated 3 times: [ wlan0: CTRL-EVENT-SCAN-FAILED ret=-19 retry=1] Feb 28 01:46:52 evren NetworkManager[691]: <info> (wlan0): using nl80211 for WiFi device control Feb 28 01:46:52 evren NetworkManager[691]: <info> (wlan0): driver supports Access Point (AP) mode Feb 28 01:46:52 evren kernel: [ 4978.576459] input: phy1 WPS Button as /devices/pci0000:00/0000:00:13.2/usb4/4-1/4-1.4/4-1.4:1.0/ieee80211/phy1/input31 Feb 28 01:46:52 evren NetworkManager[691]: <info> rfkill8: found WiFi radio killswitch (at /sys/devices/pci0000:00/0000:00:13.2/usb4/4-1/4-1.4/4-1.4:1.0/ieee80211/phy1/rfkill8) (driver carl9170) Feb 28 01:46:52 evren systemd[1]: Starting Load/Save RF Kill Switch Status of rfkill8... Feb 28 01:46:52 evren systemd[1]: Started Load/Save RF Kill Switch Status of rfkill8. Feb 28 01:46:53 evren kernel: [ 4978.752536] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready Feb 28 01:46:53 evren kernel: [ 4978.753087] usb 4-1.4: no command feedback received (-90). Feb 28 01:46:53 evren kernel: [ 4978.753098] usb 4-1.4: restart device (6) Feb 28 01:46:53 evren NetworkManager[691]: <info> devices added (path: /sys/devices/pci0000:00/0000:00:13.2/usb4/4-1/4-1.4/4-1.4:1.0/net/wlan0, iface: wlan0) Feb 28 01:46:53 evren NetworkManager[691]: <info> device added (path: /sys/devices/pci0000:00/0000:00:13.2/usb4/4-1/4-1.4/4-1.4:1.0/net/wlan0, iface: wlan0): no ifupdown configuration found. Feb 28 01:46:53 evren wpa_supplicant[835]: wlan0: CTRL-EVENT-REGDOM-CHANGE init=DRIVER type=COUNTRY alpha2=CN Feb 28 01:46:53 evren NetworkManager[691]: <info> (wlan0): supplicant interface state: disabled -> inactive Feb 28 01:46:54 evren kernel: [ 4979.891093] usb 4-1.4: device restarted successfully. Feb 28 01:46:54 evren kernel: [ 4979.899273] ieee80211 phy1: Hardware restart was requested Feb 28 01:46:54 evren avahi-daemon[681]: Withdrawing workstation service for wlan0. Feb 28 01:46:54 evren ModemManager[642]: <info> (net/wlan0): released by modem /sys/devices/pci0000:00/0000:00:13.2/usb4/4-1/4-1.4 Feb 28 01:46:54 evren NetworkManager[691]: <info> devices removed (path: /sys/devices/pci0000:00/0000:00:13.2/usb4/4-1/4-1.4/4-1.4:1.0/net/wlan0, iface: wlan0) Feb 28 01:46:54 evren NetworkManager[691]: <info> radio killswitch /sys/devices/pci0000:00/0000:00:13.2/usb4/4-1/4-1.4/4-1.4:1.0/ieee80211/phy1/rfkill8 disappeared Feb 28 01:46:54 evren systemd[1]: Stopping Load/Save RF Kill Switch Status of rfkill8... Feb 28 01:46:54 evren NetworkManager[691]: <info> (wlan0): supplicant interface state: inactive -> disabled Feb 28 01:46:54 evren systemd[1]: Stopped Load/Save RF Kill Switch Status of rfkill8. Feb 28 01:46:55 evren ModemManager[642]: <info> Couldn't find support for device at '/sys/devices/pci0000:00/0000:00:13.2/usb4/4-1/4-1.4': not supported by any plugin Cab smb help me to solve this issue? -- 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
