kernel-packages team mailing list archive

[Sander Brandenburg <sander.brandenburg@xxxxxxxxx>]

@Oleksij, it appears tougher to locate than I thought.

I'm back to kernel 3.11.0-15-generic. I tried to overheat by stressing
the CPU, GPU and wireless device for 15 minutes by running stress --cpu
4, glxgears fullscreen (vsync on however) and setting txpower to 20 and
pingflooding my gateway (sudo ping -f -s 1476 ). It did not succeed.

Only after 6-9 hours of moderately (ping -Di 0.2 -s 65507 192.168.1.1,
you'll be the judge) pingflooding my gateway I got into this state where
I could not ping my gateway anymore. Stopping the ping flood, waiting a
while and trying a normal ping again did not appear to work. Only after
suspending, waiting a while and resuming I can get the wifi adapter to
function again. Resuming 1-2 seconds after suspending did not work for
me. However, after this suspend-resume trick I can trigger the
nonfunctional state quite easily after 10-15 minutes.

So I am a bit confused about whether this is related to overheating, if
it takes such a long while to trigger. Can I enable some kind of
debugging to show this behaviour?

-- 
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:
  Incomplete

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)

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