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[Bug 1160188] Re: ATH9K wireless signal weak


On one of my Packard Bell EasyNote LV, the wireless network stop working
some minutes after boot.   Only a reboot get it working again.  I tried
to use the 3.11 rc2 kernel, but it reintroduced the black screen of
death and thus was not a very good alternative.  The machine need
acpi_backlight=vendor in raring to not turn off the screen completely,
and this setting no longer work with v3.11.

One of the other ones have not had this problem, but it might be caused
by it running an earlier raring kernel.  I'm testing it again with the
latest kernel version now.

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  ATH9K wireless signal weak

Status in The Linux Kernel:
  Fix Released
Status in “linux” package in Ubuntu:
Status in “linux” package in Gentoo Linux:

Bug description:
  AR9485 Wireless Network Adapter has a low signal when in close range
  of station.

  I disabled hardware encryption with putting:
    options ath9k nohwcrypt=1

  That doesn't seemed to help.

  The signal has 2 bars while it has full strength in windows. (I am 2
  meters away from the wifi station)

  s400ca:~$ rfkill list all
  2: asus-wlan: Wireless LAN
   Soft blocked: no
   Hard blocked: no
  3: asus-bluetooth: Bluetooth
   Soft blocked: no
   Hard blocked: no
  4: hci0: Bluetooth
   Soft blocked: no
   Hard blocked: no
  5: phy0: Wireless LAN
   Soft blocked: no
   Hard blocked: no

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: linux-image-3.5.0-26-generic 3.5.0-26.42
  ProcVersionSignature: Ubuntu 3.5.0-26.42-generic
  Uname: Linux 3.5.0-26-generic x86_64
  ApportVersion: 2.6.1-0ubuntu10
  Architecture: amd64
   /dev/snd/controlC0:  jintux     1988 F.... pulseaudio
  Date: Tue Mar 26 06:33:06 2013
  InstallationDate: Installed on 2013-03-25 (0 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  MarkForUpload: True
   PATH=(custom, no user)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-26-generic root=UUID=52689dee-4881-48b6-8cca-602e15292652 ro quiet splash vt.handoff=7
   linux-restricted-modules-3.5.0-26-generic N/A
   linux-backports-modules-3.5.0-26-generic  N/A
   linux-firmware                            1.95
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/28/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: S400CA.203
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: S400CA
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrS400CA.203:bd09/28/2012:svnASUSTeKCOMPUTERINC.:pnS400CA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnS400CA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: S400CA
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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