Hello: I am running 12.10 LTS and have the same/similar problem.
Connects at boot, remaining strong and stable but after a while, the connection will drop and the system will try to connect again. This does not happen and after a while, although configured to connect automatically, the pop-up asking to connect (fields are not blank) comes up but connection does not happen and the pop-up comes up once again after a while. Unplugging and replugging the USB dongle has the effect of freezing the system which requires a hard reset as ctrl-alt-del will not do. Another symptom when system freezes is that kb leds flash on and off repeatedly. *** -- lsusb (snip) Bus 001 Device 002: ID 0cf3:7015 Atheros Communications, Inc. TP-Link TL-WN821N v3 802.11n [Atheros AR7010+AR9287] *** Curiously enough, the hardware data on the label is 'TL-WN822N V2', which apparently has a different chipset. I have seen this reported elsewhere. -- modinfo ath9k_usb ERROR: modinfo: could not find module ath9k_usb modinfo ath9k_ath ERROR: modinfo: could not find module ath9k_ath modinfo ath9k filename: /lib/modules/3.2.0-53-generic/kernel/drivers/net/wireless/ath/ath9k/ath9k.ko license: Dual BSD/GPL description: Support for Atheros 802.11n wireless LAN cards. author: Atheros Communications srcversion: 426E3BAA91A2633D95E6FD2 alias: platform:ar934x_wmac alias: platform:ar933x_wmac alias: platform:ath9k alias: pci:v0000168Cd00000037sv*sd*bc*sc*i* alias: pci:v0000168Cd00000034sv*sd*bc*sc*i* alias: pci:v0000168Cd00000033sv*sd*bc*sc*i* alias: pci:v0000168Cd00000032sv*sd*bc*sc*i* alias: pci:v0000168Cd00000030sv*sd*bc*sc*i* alias: pci:v0000168Cd0000002Esv*sd*bc*sc*i* alias: pci:v0000168Cd0000002Dsv*sd*bc*sc*i* alias: pci:v0000168Cd0000002Csv*sd*bc*sc*i* alias: pci:v0000168Cd0000002Bsv*sd*bc*sc*i* alias: pci:v0000168Cd0000002Asv*sd*bc*sc*i* alias: pci:v0000168Cd00000029sv*sd*bc*sc*i* alias: pci:v0000168Cd00000027sv*sd*bc*sc*i* alias: pci:v0000168Cd00000024sv*sd*bc*sc*i* alias: pci:v0000168Cd00000023sv*sd*bc*sc*i* depends: ath9k_hw,ath9k_common,mac80211,cfg80211,ath intree: Y vermagic: 3.2.0-53-generic SMP mod_unload modversions 686 parm: debug:Debugging mask (uint) parm: nohwcrypt:Disable hardware encryption (int) parm: blink:Enable LED blink on activity (int) parm: btcoex_enable:Enable wifi-BT coexistence (int) *** iwconfig lo no wireless extensions. wlan1 IEEE 802.11bgn ESSID:"XXXXXX" Mode:Managed Frequency:2.412 GHz Access Point: 1C:AF:F7:17:2A:4C Bit Rate=65 Mb/s Tx-Power=20 dBm Retry long limit:7 RTS thr:off Fragment thr:off Power Management:off Link Quality=49/70 Signal level=-61 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 - Tx excessive retries:0 Invalid misc:1 Missed beacon:0 eth0 no wireless extensions.20 days) *** I see this bug was confirmed as being of high imprtance almost year ago (in ~20 days). Are there any news as to what progress has been made, if any? After all, it does seem to be a kernel issue. Thanks in advance, CIV -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1049383 Title: ath9k_usb: TL-WN821N v3 (AR7010+9287) Connection drops Status in The Linux Kernel: Confirmed Status in “linux” package in Ubuntu: Triaged Bug description: Hi. The connection with this device is fast and stable, but seems to drop after a certain amount of data has been transmitted. The easiest way to reproduce it is to download something large. I can always reproduce it by downloading a torrent. After about 300-400MB, it seems like the wireless dongle hangs and the connection doesn't work anymore. At this point, network commands such as iwconfig freeze, and it's also impossible to reboot or turn off the computer. However, if the wireless dongle is unplugged and plugged again, everything's back to normal. The module is set with nohwcrypt=1. If this option is not set, the connection drops much faster. Also, I've noticed that the latency is lower with nohwcrypt=1 (using speedtest.net, the latency without hardware encryption is consistently 3 times less). Description: Ubuntu 12.04.1 LTS Release: 12.04 linux-generic: Installed: 3.2.0.30.32 Candidate: 3.2.0.30.32 Version table: *** 3.2.0.30.32 0 500 http://es.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages 100 /var/lib/dpkg/status 3.2.0.29.31 0 500 http://security.ubuntu.com/ubuntu/ precise-security/main amd64 Packages 3.2.0.23.25 0 500 http://es.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages *******Results of lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 005 Device 002: ID 046d:c00e Logitech, Inc. M-BJ58/M-BJ69 Optical Wheel Mouse Bus 002 Device 004: ID 0cf3:7015 Atheros Communications, Inc. TP-Link TL-WN821N v3 802.11n [Atheros AR7010+AR9287] ******* Results for modinfo ath9k_usb: filename: /lib/modules/3.2.0-30-generic/kernel/drivers/net/wireless/ath/ath9k/ath9k_htc.ko firmware: htc_9271.fw firmware: htc_7010.fw description: Atheros driver 802.11n HTC based wireless devices license: Dual BSD/GPL author: Atheros Communications srcversion: 9B885B82530A1FF8F15C062 alias: usb:v0CF3p20FFd*dc*dsc*dp*ic*isc*ip* alias: usb:v0411p017Fd*dc*dsc*dp*ic*isc*ip* alias: usb:v083ApA704d*dc*dsc*dp*ic*isc*ip* alias: usb:v0846p9018d*dc*dsc*dp*ic*isc*ip* alias: usb:v0CF3p7010d*dc*dsc*dp*ic*isc*ip* alias: usb:v1668p1200d*dc*dsc*dp*ic*isc*ip* alias: usb:v0CF3p7015d*dc*dsc*dp*ic*isc*ip* alias: usb:v057Cp8403d*dc*dsc*dp*ic*isc*ip* alias: usb:v0CF3pB003d*dc*dsc*dp*ic*isc*ip* alias: usb:v040Dp3801d*dc*dsc*dp*ic*isc*ip* alias: usb:v04CAp4605d*dc*dsc*dp*ic*isc*ip* alias: usb:v13D3p3350d*dc*dsc*dp*ic*isc*ip* alias: usb:v13D3p3349d*dc*dsc*dp*ic*isc*ip* alias: usb:v13D3p3348d*dc*dsc*dp*ic*isc*ip* alias: usb:v13D3p3346d*dc*dsc*dp*ic*isc*ip* alias: usb:v13D3p3328d*dc*dsc*dp*ic*isc*ip* alias: usb:v13D3p3327d*dc*dsc*dp*ic*isc*ip* alias: usb:v07D1p3A10d*dc*dsc*dp*ic*isc*ip* alias: usb:v0846p9030d*dc*dsc*dp*ic*isc*ip* alias: usb:v0CF3p1006d*dc*dsc*dp*ic*isc*ip* alias: usb:v0CF3p9271d*dc*dsc*dp*ic*isc*ip* depends: ath9k_hw,ath9k_common,mac80211,ath,cfg80211 intree: Y vermagic: 3.2.0-30-generic SMP mod_unload modversions parm: debug:Debugging mask (uint) parm: nohwcrypt:Disable hardware encryption (int) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1049383/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp