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[Bug 1437913] Re: Wifi unstable on vivid with Intel 7265 (Thinkpad X250)


Ryan Finnie, the issue you are reporting is an upstream one. Could you
please report this problem to the appropriate mailing list (linux-
wireless) by following the instructions verbatim at
https://wiki.ubuntu.com/Bugs/Upstream/kernel ?

Please provide a direct URL to your e-mail to the mailing list once you
have made it so that it may be tracked via http://vger.kernel.org/vger-
lists.html . It can take a day for the new e-mail to show up in the
respective archive.

Thank you for your understanding.

** Changed in: linux (Ubuntu)
       Status: Confirmed => Triaged

** Tags added: latest-router-firmware

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  Wifi unstable on vivid with Intel 7265 (Thinkpad X250)

Status in linux package in Ubuntu:

Bug description:
  After upgrading from utopic to vivid beta, wifi on the Intel 7265 on
  my Thinkpad X250 has become unstable (linux-image 3.19.0-10.10, linux-
  firmware 1.143).  I'm seeing two primary problems:

   * On 5GHz 802.11ac, I'll get DEAUTH_LEAVING almost exactly every minute, followed by an immediate reconnect.
   * On both 2.4GHz and 5GHz, all network activity will cease after 10-20 minutes.  A manual reconnect will temporarily fix network activity.

  This is complicated by the fact that the newer firmware requires
  kernel 3.19 and kernel 3.19 requires the iwlwifi-7265D*.ucode firmware
  instead of the old iwlwifi-7265*.ucode firmware, so it's not possible
  to mix/match older/newer kernel/firmware combinations, nor do a kernel

  FAOD, the latest utopic kernel/firmware combination (linux-image
  3.16.0-33.44, linux-firmware 1.138.1) works fine, which I can use in
  vivid if I manually install them.

  I have tested ~kernel-ppa/mainline 3.19.3-031903.201503261036 and
  4.0.0-040000rc5.201503230035, which exhibit the same problems.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-10-generic 3.19.0-10.10
  ProcVersionSignature: Ubuntu 3.19.0-10.10-generic 3.19.2
  Uname: Linux 3.19.0-10-generic x86_64
  ApportVersion: 2.16.2-0ubuntu5
  Architecture: amd64
   /dev/snd/controlC0:  ryan       1862 F.... pulseaudio
   /dev/snd/controlC1:  ryan       1862 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sun Mar 29 11:42:13 2015
  HibernationDevice: RESUME=UUID=c21a0227-27e2-4c4f-8bd9-30793932acbc
  InstallationDate: Installed on 2015-03-07 (22 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  MachineType: LENOVO 20CMCTO1WW
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-10-generic root=/dev/mapper/ubuntu--vg-root ro acpi_osi=Linux acpi_backlight=vendor psmouse.proto=imps quiet splash vt.handoff=7
   linux-restricted-modules-3.19.0-10-generic N/A
   linux-backports-modules-3.19.0-10-generic  N/A
   linux-firmware                             1.143
  SourcePackage: linux
  UpgradeStatus: Upgraded to vivid on 2015-03-29 (0 days ago)
  dmi.bios.date: 01/23/2015
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N10ET28W (1.05 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20CMCTO1WW
  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: None
  dmi.modalias: dmi:bvnLENOVO:bvrN10ET28W(1.05):bd01/23/2015:svnLENOVO:pn20CMCTO1WW:pvrThinkPadX250:rvnLENOVO:rn20CMCTO1WW:rvrSDK0E50512STD:cvnLENOVO:ct10:cvrNone:
  dmi.product.name: 20CMCTO1WW
  dmi.product.version: ThinkPad X250
  dmi.sys.vendor: LENOVO

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