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[Niklas Vainio <1522944@xxxxxxxxxxxxxxxxxx>]

It seems my system hadn't properly updated the linux-image-extra
package. Everything works now after that update.

This happened after I submitted the bug report:

Start-Date: 2015-12-05  08:15:45
Commandline: /usr/bin/unattended-upgrade
Install: linux-headers-4.2.0-19:amd64 (4.2.0-19.23, automatic), linux-headers-4.
2.0-19-generic:amd64 (4.2.0-19.23, automatic), linux-image-extra-4.2.0-19-generi
c:amd64 (4.2.0-19.23, automatic)
Upgrade: linux-headers-generic:amd64 (4.2.0.18.20, 4.2.0.19.21), keepassx:amd64 
(0.4.3+dfsg-0.1ubuntu1, 0.4.3+dfsg-0.1ubuntu1.15.10.1), thunderbird-locale-en-us
:amd64 (38.3.0+build1-0ubuntu2, 38.4.0+build3-0ubuntu0.15.10.1), thunderbird:amd
64 (38.3.0+build1-0ubuntu2, 38.4.0+build3-0ubuntu0.15.10.1), thunderbird-locale-
en:amd64 (38.3.0+build1-0ubuntu2, 38.4.0+build3-0ubuntu0.15.10.1), thunderbird-locale-fi:amd64 (38.3.0+build1-0ubuntu2, 38.4.0+build3-0ubuntu0.15.10.1), thunderbird-gnome-support:amd64 (38.3.0+build1-0ubuntu2, 38.4.0+build3-0ubuntu0.15.10.1), linux-libc-dev:amd64 (4.2.0-18.22, 4.2.0-19.23), linux-image-generic:amd64 (4.2.0.18.20, 4.2.0.19.21), linux-generic:amd64 (4.2.0.18.20, 4.2.0.19.21)

I had some problems related to the hplip package so I had to do apt-get
-f install:

Start-Date: 2015-12-08  15:08:27
Commandline: apt-get -f install
Upgrade: linux-image-extra-4.2.0-19-generic:amd64 (4.2.0-19.23, 4.2.0-19.23)
Remove: hplip:amd64 (3.15.11-0ubuntu1), printer-driver-postscript-hp:amd64 (3.15.7-0ubuntu4), hplip-gui:amd64 (3.15.7-0ubuntu4)
End-Date: 2015-12-08  15:09:15

I think this finally resolved the problem.

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https://bugs.launchpad.net/bugs/1522944

Title:
  Wifi broken and strange screen resolution after update

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  After update from kernel 4.2.0-18 to 4.2.0-19, my wifi got broken and
  the video driver had some problems too, because my resolution was
  downgraded to 1024x768. Boot startup screen was changed from a
  graphics mode to a low resolution text mode (25x80 maybe).

  I had to boot back to 4.2.0-18 to report this bug. Please let me know
  what extra information is needed.

  From /var/log/apt/history.log:

  Start-Date: 2015-12-02  07:38:24
  Commandline: /usr/bin/unattended-upgrade
  Install: linux-headers-4.2.0-19:amd64 (4.2.0-19.23, automatic), linux-headers-4.2.0-19-generic:amd64 (4.2.0-19.23, automatic), linux-image-extra-4.2.0-19-generic:amd64 (4.2.0-19.23, automatic), linux-image-4.2.0-19-generic:amd64 (4.2.0-19.23, automatic)
  Upgrade: linux-headers-generic:amd64 (4.2.0.18.20, 4.2.0.19.21), thunderbird-locale-en-us:amd64 (38.3.0+build1-0ubuntu2, 38.4.0+build3-0ubuntu0.15.10.1), thunderbird:amd64 (38.3.0+build1-0ubuntu2, 38.4.0+build3-0ubuntu0.15.10.1), thunderbird-locale-en:amd64 (38.3.0+build1-0ubuntu2, 38.4.0+build3-0ubuntu0.15.10.1), thunderbird-locale-fi:amd64 (38.3.0+build1-0ubuntu2, 38.4.0+build3-0ubuntu0.15.10.1), thunderbird-gnome-support:amd64 (38.3.0+build1-0ubuntu2, 38.4.0+build3-0ubuntu0.15.10.1), linux-libc-dev:amd64 (4.2.0-18.22, 4.2.0-19.23), linux-image-generic:amd64 (4.2.0.18.20, 4.2.0.19.21), linux-generic:amd64 (4.2.0.18.20, 4.2.0.19.21)

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.2.0-19-generic:amd64 4.2.0-19.23
  ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3
  Uname: Linux 4.2.0-18-generic x86_64
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  nikke      4087 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Fri Dec  4 21:20:27 2015
  HibernationDevice: RESUME=UUID=46f62d42-a77b-4f1a-be16-b3b015057bd6
  InstallationDate: Installed on 2014-06-25 (527 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: LENOVO 42912WG
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.2.0-18-generic root=/dev/mapper/ubuntu--vg-root ro vesafb.invalid=1 splash quiet nopat
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-18-generic N/A
   linux-backports-modules-4.2.0-18-generic  N/A
   linux-firmware                            1.149.2
  SourcePackage: linux
  UpgradeStatus: Upgraded to wily on 2015-11-19 (15 days ago)
  dmi.bios.date: 07/18/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 8DET69WW (1.39 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 42912WG
  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:bvr8DET69WW(1.39):bd07/18/2013:svnLENOVO:pn42912WG:pvrThinkPadX220:rvnLENOVO:rn42912WG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 42912WG
  dmi.product.version: ThinkPad X220
  dmi.sys.vendor: LENOVO

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