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[Tomas Van Verrewegen <tomasvanverrewegen@xxxxxxxxxx>]

One more very weird thing: when I use the keyboard to increase or
decrease screen brightness, the laptop goes to sleep. This didn't happen
before.

I checked "systemsettings/shortcuts and gestures" but this seems ok:
"decrease sceen brightness -> monitor brightness down"

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https://bugs.launchpad.net/bugs/1373969

Title:
  Ubuntu 14.04 blank screen after wakeup from sleep on Toshiba Satellite
  (M50D-A-100)

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Since my last update (+-5 days ago), every time my laptop goes to
  sleep, I get a black screen without backlight when I open the lid, or
  press the power key to wake it up.

  Description:    Ubuntu 14.04.1 LTS
  Release:        14.04

  See:
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1283938/comments/110

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-35-generic 3.13.0-35.62
  ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
  Uname: Linux 3.13.0-35-generic x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.14.1-0ubuntu3.4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  tomas      2563 F.... pulseaudio
                        tomas      2870 F.... pulseaudio
   /dev/snd/controlC0:  tomas      2563 F.... pulseaudio
                        tomas      2870 F.... pulseaudio
  CurrentDesktop: KDE
  Date: Thu Sep 25 16:20:20 2014
  HibernationDevice: RESUME=UUID=d2fd1cf4-e11c-480e-8d66-bbcca1016bdf
  InstallationDate: Installed on 2014-01-17 (250 days ago)
  InstallationMedia: Kubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: TOSHIBA SATELLITE M50D-A
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-35-generic root=UUID=4517aa0b-909b-4d2a-a134-4ab34edf82de ro nomodeset quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-35-generic N/A
   linux-backports-modules-3.13.0-35-generic  N/A
   linux-firmware                             1.127.6
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2014-04-20 (158 days ago)
  dmi.bios.date: 08/05/2013
  dmi.bios.vendor: TOSHIBA
  dmi.bios.version: 1.10
  dmi.board.asset.tag: *
  dmi.board.name: ZEMAE
  dmi.board.vendor: TOSHIBA
  dmi.board.version: 1.00
  dmi.chassis.asset.tag: *
  dmi.chassis.type: 10
  dmi.chassis.vendor: TOSHIBA
  dmi.chassis.version: *
  dmi.modalias: dmi:bvnTOSHIBA:bvr1.10:bd08/05/2013:svnTOSHIBA:pnSATELLITEM50D-A:pvrPSKPSE-00600GBT:rvnTOSHIBA:rnZEMAE:rvr1.00:cvnTOSHIBA:ct10:cvr*:
  dmi.product.name: SATELLITE M50D-A
  dmi.product.version: PSKPSE-00600GBT
  dmi.sys.vendor: TOSHIBA

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