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[Sylvain Falardeau <1313155@xxxxxxxxxxxxxxxxxx>]

On Ubuntu 14.10, compiz 1:0.9.12+14.10.20140918-0ubuntu1, I just tested
a couple of times to let the screen saver turn off the screen and I can
show the lock screen again.

The bug seems resolved in this version.

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https://bugs.launchpad.net/bugs/1313155

Title:
  Screen stays blank after screen saver triggered

Status in “xorg” package in Ubuntu:
  New

Bug description:
  To reproduce:

  - Set the screen saver in System Settings / Brightness&Lock to 1 minute to speed up testing. Disable screen lock.
  - Wait one minute
  - The screen fade to black
  - The monitor indicate entering in power save mode, wait a couple of seconds.
  - Press a key to show the screen again.
  - The monitor turn on again but the screen is dark (but not as dark as when the monitor is off).

  I tried switching with CTRL-ALT-F1 to console but I don't see it. With
  another machine I can still login by ssh so the machine is not dead. I
  can also use the console to login and sudo reboot (without seeing
  anything).

  It happen once that I saw the Ubuntu desktop instead of a blank screen
  but the left border was shifted 80% to the right. The desktop and
  mouse was responsive but it is too weird to work with.

  Rebooting fix the problem. I tried different xrandr commands with ssh
  with another machine (--off, --mode to switch resolutions) but without
  success.

  As a temporary measure, I disabled the screen saver and the automatic
  lock. When I want to stop working on my computer, I do CTLR-ALT-L to
  lock and CTRL-ALT-F1 to switch to console. Then I manually close my
  monitor. When I come back, I open the monitor again and I switch to
  CTRL-ALT-F7. The lock screen is visible and I can unlock and work.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xorg 1:7.7+1ubuntu8
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: Unity
  Date: Sat Apr 26 13:26:04 2014
  DistUpgraded: 2014-04-19 19:21:14,189 DEBUG enabling apt cron job
  DistroCodename: trusty
  DistroVariant: ubuntu
  DkmsStatus:
   virtualbox, 4.3.10, 3.11.0-19-generic, x86_64: installed
   virtualbox, 4.3.10, 3.13.0-24-generic, x86_64: installed
  EcryptfsInUse: Yes
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Advanced Micro Devices, Inc. [AMD/ATI] Turks PRO [Radeon HD 6570/7570/8550] [1002:6759] (prog-if 00 [VGA controller])
     Subsystem: ASUSTeK Computer Inc. Device [1043:0477]
  InstallationDate: Installed on 2013-12-18 (129 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: ASUS All Series
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=c2e5aa1a-ee79-434d-a13c-6969ef5102c0 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  UpgradeStatus: Upgraded to trusty on 2014-04-19 (6 days ago)
  dmi.bios.date: 04/18/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 0311
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: Z87M-PLUS
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev X.0x
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0311:bd04/18/2013:svnASUS:pnAllSeries:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnZ87M-PLUS:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: All Series
  dmi.product.version: System Version
  dmi.sys.vendor: ASUS
  version.compiz: compiz 1:0.9.11+14.04.20140409-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.52-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.0-4ubuntu5
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.0-4ubuntu5
  version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
  xserver.bootTime: Fri Apr 25 22:30:29 2014
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.15.1-0ubuntu2
  xserver.video_driver: radeon

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