** Changed in: xorg (Ubuntu)
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1580296

Title:
  Screen is blank and won't recover

Status in xorg package in Ubuntu:
  Confirmed

Bug description:
  I am running Xubuntu 16.04, I have reproduced this problem on both the
  Gigabyte Brix system and the NUC5i7RYH system. Both use integrated
  Intel graphics.

  The symptom is that after a long period of time (like overnight) the
  screen is blanked and moving the mouse or pressing keys on the
  keyboard will not switch the screen back on. Using Ctl-Alt-Fx will let
  me bring up an alternate VT however, so I can log in and look around.
  Switching back to VT7 (where Xubuntu is) the screen goes black again
  and won't wake up.

  The only error message I can find is in lightdm.log which is as
  follows:

  [160363.826] (II) intel(0): Modeline "1920x1080"x0.0  148.50  1920 2448 2492 
2640  1080 1084 1089 1125 +hsync +vsync (56.2 kHz e)
  [161295.000] (II) AIGLX: Suspending AIGLX clients for VT switch
  [161328.781] (II) AIGLX: Resuming AIGLX clients after VT switch
  [161328.781] (EE) intel(0): sna_mode_shutdown_crtc: invalid state found on 
pipe 0, disabling CRTC:21

  If I send a SIGHUP to the session manager it restarts and the screen
  wakes up with the Login screen again, that of course loses all my open
  windows from the previous session so it isn't really optimal.

  The lightdm log seems to suggest that it tried to "wake up" but that
  something happened that wasn't supposed to. When it isn't in this
  state (say for example I am up and running and I use Ctl-Alt-F2 to
  switch to Vt2 and then switch back to lightdm it works as expected and
  there is no error.

  I've set every parameter of every screen saver locker blanker etc to
  never suspend block or shutdown. And the screen still blanks. That
  makes me wonder what agency is turning off the screen.

  Let me know where to look and I'll add data to this bug. The situation
  is quite reproducible.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: xorg 1:7.7+13ubuntu3
  ProcVersionSignature: Ubuntu 4.4.0-22.39-generic 4.4.8
  Uname: Linux 4.4.0-22-generic x86_64
  .tmp.unity_support_test.0:
   
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: None
  CurrentDesktop: XFCE
  Date: Tue May 10 11:30:30 2016
  DistUpgraded: 2016-04-29 22:17:07,822 DEBUG Running PostInstallScript: 
'./xorg_fix_proprietary.py'
  DistroCodename: xenial
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] 
(rev 09) (prog-if 00 [VGA controller])
     Subsystem: Gigabyte Technology Co., Ltd Haswell-ULT Integrated Graphics 
Controller [1458:d000]
  InstallationDate: Installed on 2016-03-18 (53 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
  MachineType: GIGABYTE MMLP5AP-00
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-22-generic 
root=UUID=7a790f8d-8940-4397-a820-c35ca84f7696 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: Upgraded to xenial on 2016-04-30 (10 days ago)
  dmi.bios.date: 08/29/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: F2
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: MMLP5AP-00
  dmi.board.vendor: GIGABYTE
  dmi.board.version: 1.x
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 10
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrF2:bd08/29/2013:svnGIGABYTE:pnMMLP5AP-00:pvr1.x:rvnGIGABYTE:rnMMLP5AP-00:rvr1.x:cvnToBeFilledByO.E.M.:ct10:cvrToBeFilledByO.E.M.:
  dmi.product.name: MMLP5AP-00
  dmi.product.version: 1.x
  dmi.sys.vendor: GIGABYTE
  version.compiz: compiz 1:0.9.12.2+16.04.20160415-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.67-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2
  version.xserver-xorg-core: xserver-xorg-core 2:1.18.3-1ubuntu2
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20160325-1ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:1.0.12-1build2
  xserver.bootTime: Tue May 10 11:00:37 2016
  xserver.configfile: default
  xserver.devices:
   input        Power Button         KEYBOARD, id 6
   input        Video Bus            KEYBOARD, id 7
   input        Power Button         KEYBOARD, id 8
   input        Logitech K400        KEYBOARD, id 9
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                               10147 
   vendor                                     ACI
  xserver.version: 2:1.18.3-1ubuntu2

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