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[Bug 1456285] Re: Intel 7260 problems on Thinkpad T440s


OK, I will do this, but it will take me a few days to get to it.

Could I ask, what are the pros and cons of using this working kernel in
the meantime, before there is a "proper" (?) fix for this problem? I
presume I should not install any of the updates I am automatically
prompted about for now, because by installing this kernel I have moved
off the sequence of machine states that is expected by whatever is
sending me those updates? But other than that, if I try to just leave
things as they are for a few weeks perhaps and use this working kernel,
is there any risk of something else going wrong?

Thanks for all the help.

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  Intel 7260 problems on Thinkpad T440s

Status in linux package in Ubuntu:

Bug description:
  Very intermittent and inconsistent wireless connections. Occasionally
  the indicator will show that the connection has been lost, but more
  often it seems that the indicator just shows low signal strength -- as
  it generally does even when the connection is working well.

  I'm pretty sure this is not an access-point problem because we have
  other devices using the same network without any problem.

  Here's some of the additional information that has been requested in
  other discussions of similar problems, although I don't fully
  understand what all these results mean.

  I have these three firmware files in /lib/firmware:
  -rw-r--r--  1 root root  683236 Nov 24 09:42 iwlwifi-7260-7.ucode
  -rw-r--r--  1 root root  679780 Dec  1 09:16 iwlwifi-7260-8.ucode
  -rw-r--r--  1 root root  680508 Dec  1 14:45 iwlwifi-7260-9.ucode

  dmesg | grep iwlwifi | grep firmware
  [   11.974201] iwlwifi 0000:03:00.0: loaded firmware version op_mode iwlmvm

  lspci -nn | grep 0280
  03:00.0 Network controller [0280]: Intel Corporation Wireless 7260 [8086:08b2] (rev 83)

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-52-generic 3.13.0-52.86
  ProcVersionSignature: Ubuntu 3.13.0-52.86-generic 3.13.11-ckt18
  Uname: Linux 3.13.0-52-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.10
  Architecture: amd64
   /dev/snd/controlC1:  timh       2011 F.... pulseaudio
                        timh       2801 F.... pulseaudio
   /dev/snd/controlC0:  timh       2011 F.... pulseaudio
                        timh       2801 F.... pulseaudio
  CurrentDesktop: XFCE
  Date: Mon May 18 12:05:48 2015
  HibernationDevice: RESUME=UUID=799c429f-edb4-438c-bbc7-386342199d23
  InstallationDate: Installed on 2014-03-12 (432 days ago)
  InstallationMedia: Xubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016)
  MachineType: LENOVO 20ARCTO1WW
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-52-generic root=/dev/mapper/xubuntu--vg-root ro quiet splash vt.handoff=7
   linux-restricted-modules-3.13.0-52-generic N/A
   linux-backports-modules-3.13.0-52-generic  N/A
   linux-firmware                             1.127.11
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2015-03-16 (63 days ago)
  dmi.bios.date: 02/10/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: GJET71WW (2.21 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20ARCTO1WW
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0E50512 STD
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrGJET71WW(2.21):bd02/10/2014:svnLENOVO:pn20ARCTO1WW:pvrThinkPadT440s:rvnLENOVO:rn20ARCTO1WW:rvrSDK0E50512STD:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 20ARCTO1WW
  dmi.product.version: ThinkPad T440s
  dmi.sys.vendor: LENOVO

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