ath9k_usb: TL-WN821N v3 (AR7010+9287) Connection drops
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
Linux |
Confirmed
|
High
|
|||
linux (Fedora) |
Expired
|
Undecided
|
|||
linux (Ubuntu) |
Incomplete
|
Medium
|
Unassigned |
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://
100 /var/lib/
3.2.0.29.31 0
500 http://
3.2.0.23.25 0
500 http://
*******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/
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: 9B885B82530A1FF
alias: usb:v0CF3p20FFd
alias: usb:v0411p017Fd
alias: usb:v083ApA704d
alias: usb:v0846p9018d
alias: usb:v0CF3p7010d
alias: usb:v1668p1200d
alias: usb:v0CF3p7015d
alias: usb:v057Cp8403d
alias: usb:v0CF3pB003d
alias: usb:v040Dp3801d
alias: usb:v04CAp4605d
alias: usb:v13D3p3350d
alias: usb:v13D3p3349d
alias: usb:v13D3p3348d
alias: usb:v13D3p3346d
alias: usb:v13D3p3328d
alias: usb:v13D3p3327d
alias: usb:v07D1p3A10d
alias: usb:v0846p9030d
alias: usb:v0CF3p1006d
alias: usb:v0CF3p9271d
depends: ath9k_hw,
intree: Y
vermagic: 3.2.0-30-generic SMP mod_unload modversions
parm: debug:Debugging mask (uint)
parm: nohwcrypt:Disable hardware encryption (int)
affects: | linux-meta (Ubuntu) → linux (Ubuntu) |
Changed in linux (Ubuntu): | |
importance: | Undecided → Medium |
tags: | added: kernel-bug-exists-upstream kernel-da-key precise |
Changed in linux (Ubuntu): | |
status: | New → Triaged |
Changed in linux: | |
importance: | Unknown → High |
status: | Unknown → Confirmed |
tags: | added: ath9k-htc |
Changed in linux (Fedora): | |
importance: | Unknown → Undecided |
status: | Unknown → Expired |
Looks like this is the same as https:/ /bugzilla. kernel. org/show_ bug.cgi? id=42661. I'll add an upstream bug watch.