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[Bug 1584533] Re: Lenovo X220 unable to wlan after resume from sleep


Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.6 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:

Once testing of the upstream kernel is complete, please mark this bug as

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.6-yakkety

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

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

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  Lenovo X220 unable to wlan after resume from sleep

Status in linux package in Ubuntu:

Bug description:
  I just upgraded to Ubuntu 16.04, and now whenever I wake up my laptop
  from sleep (hibernate doesn't work due to encrypted home directory), I
  am unable to connect to any wlan network. After a hot reboot or cold
  start everything is back to normal.

  Network manager would allow me to select already known wlan networks
  through "connect to hidden network", however, it would not allow me to
  establish the actual connection (connect button never becomes active).

  I will attach four files to this bug report:

  1. dmesg-pastreboot: dmesg after a hot reboot
  2. dmesg-pastsleep: dmesg after wakeup from sleep
  3. syslog-pastreboot: syslog snippet from timeframe after reboot
  4. syslog-pastsleep: syslog snippet from timeframe after wakeup from sleep

  Please let me know, if you need any further data or info.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-22-generic 4.4.0-22.40
  ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
  Uname: Linux 4.4.0-22-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
   /dev/snd/controlC0:  rudolf     2944 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sun May 22 22:31:10 2016
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2011-05-24 (1825 days ago)
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
  MachineType: LENOVO 429135G
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-22-generic root=UUID=080f751d-bbec-44b2-bd86-f4db52f4dddf ro quiet splash i915.semaphores=1 vt.handoff=7
   linux-restricted-modules-4.4.0-22-generic N/A
   linux-backports-modules-4.4.0-22-generic  N/A
   linux-firmware                            1.157
  SourcePackage: linux
  UpgradeStatus: Upgraded to xenial on 2016-05-18 (4 days ago)
  dmi.bios.date: 04/01/2011
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 8DET42WW (1.12 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 429135G
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr8DET42WW(1.12):bd04/01/2011:svnLENOVO:pn429135G:pvrThinkPadX220:rvnLENOVO:rn429135G:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 429135G
  dmi.product.version: ThinkPad X220
  dmi.sys.vendor: LENOVO

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