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[Sander Brandenburg <sander.brandenburg@xxxxxxxxx>]

Very much so (although the settings page could be lying to me):

Copy from the settings page of my AP:
Wireless > Channel and SSID

Wireless Channel: 11	
Extension Channel: 7
SSID: ...
Wireless Mode: 802.11g
Bandwidth: 20/40Mhz (not changeable)
Broadcast SSID: enabled
Protected Mode: OFF
802.11e/WMM QoS: ON

Wireless > Security
Security Mode: WPA/WPA2-Personal(PSK)
Authentication: WPA2-PSK
Encryption Technique: AES
PSK: ....

I've set it to G because I have a PS3 and another PC with a G adapter in
the network as well. (I thought setting it to just G would be the most
reliable setting).

About my test run in trusty:
I started with using nohwcrypt=0. I sent a 12Mbit/s UDP stream over wlan0 (noone listening on the other end, so it's only transmitting). The connection died and stayed dead after 3-4 hours.

Afterwards, with nohwcrypt=1 I could run iperf for 12+ hours until I
gave up. It only lost its connection once and it reauthenticated under
water immediately after a few hours (which is not bothersome behaviour
for me).

Then again I did a test with nohwcrypt=0. I got the connection to drop
with reason 6 and 15 again after a few hours. I could not get it to
authenticate again. I switched by rmmod ath9k_htc and modprobing
ath9k_htc with the right options. Eventually this caused a cold
reset(!), with all USB devices' power being disabled at boot up. When I
replugged my USB keyboard in a different port, it got power and I could
choose the USB boot menu to boot trusty.... Instead it reset again,
turning off power to *all* USB ports, leaving me no choice but to power
down by PSU. Afterwards everything is hunky dory again. Not sure whether
this behaviour is significant, as the wifi adapter is also hosted on the
USB bus and I'm not sure whether rmmod is supposed to be that dangerous.

So I guess using nohwcrypt=1 solely is a winner for me. Txpower does not
amount to anything. I haven't had connection problems with my PS3 or
with the other PC.

I am willing to try out other things if this helps locating this bug. I
can see the Ralink RT3052 listed in the openwrt hardware table. Would it
be interesting to try out openwrt with this wifi adapter in nohwcrypt=0?

-- 
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/1273392

Title:
  0cf3:9271 [MSI FM2-A75IA-E53] ath9k_htc: AR9271 wireless device stops
  functioning

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  A long time after a cold boot, my wireless connection starts dropping,
  will try to reconnect but will not come back again. When I'm in that
  state only a suspend, waiting a while and resuming gets my wireless
  connection back again.  However, after that state it does not take
  long before it starts to drop again.

  WORKAROUND: I could not reproduce this problem again after setting
  nohwcrypt=1 on the ath9k_htc module.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-15-generic 3.11.0-15.23
  ProcVersionSignature: Ubuntu 3.11.0-15.23-generic 3.11.10
  Uname: Linux 3.11.0-15-generic x86_64
  ApportVersion: 2.12.5-0ubuntu2.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  sander     1881 F.... pulseaudio
   /dev/snd/controlC0:  sander     1881 F.... pulseaudio
  Date: Mon Jan 27 20:27:01 2014
  HibernationDevice: RESUME=UUID=3f3e0b39-93b8-4c28-a8cd-91f2cf4a6890
  InstallationDate: Installed on 2013-09-13 (136 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130912)
  MachineType: MSI MS-7792
  MarkForUpload: True
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.11.0-15-generic root=UUID=add6edeb-2e13-438b-814e-d4995835e178 ro persistent quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-15-generic N/A
   linux-backports-modules-3.11.0-15-generic  N/A
   linux-firmware                             1.116
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  WifiSyslog:

  dmi.bios.date: 04/24/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: V2.0
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: FM2-A75IA-E53 (MS-7792)
  dmi.board.vendor: MSI
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: MSI
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV2.0:bd04/24/2013:svnMSI:pnMS-7792:pvr1.0:rvnMSI:rnFM2-A75IA-E53(MS-7792):rvr1.0:cvnMSI:ct3:cvr1.0:
  dmi.product.name: MS-7792
  dmi.product.version: 1.0
  dmi.sys.vendor: MSI

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