Juha Luoma, thank you for reporting this and helping make Ubuntu better.

1) Is this something that started to happen after an update? If so,
which specifically?

2) To see if this is already resolved in your release, could you please
update your HWE stack as per
https://wiki.ubuntu.com/Kernel/LTSEnablementStack and advise to the
results?

** Tags added: bios-outdated-1.23

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

** Changed in: xorg (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1717704

Title:
  [drm] GPU HANG: ecode 8:0:0xbe722ffe, in compiz [2256], reason: Ring
  hung, action: reset

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  Right after resuming from sleep login process was interrupted and
  screen briefly want black. Restored automatically.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: xorg 1:7.7+13ubuntu3
  ProcVersionSignature: Ubuntu 4.4.0-93.116-generic 4.4.79
  Uname: Linux 4.4.0-93-generic x86_64
  .tmp.unity_support_test.0:
   
  ApportVersion: 2.20.1-0ubuntu2.10
  Architecture: amd64
  BootLog:
   
  CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  Date: Sat Sep 16 20:22:35 2017
  DistUpgraded: Fresh install
  DistroCodename: xenial
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, if not too technical
  GraphicsCard:
   Intel Corporation Broadwell-U Integrated Graphics [8086:1616] (rev 09) 
(prog-if 00 [VGA controller])
     Subsystem: Hewlett-Packard Company ZBook 15u G2 Mobile Workstation 
[103c:2216]
  InstallationDate: Installed on 2016-04-30 (504 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 
(20160420.1)
  MachineType: Hewlett-Packard HP EliteBook 850 G2
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-93-generic 
root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  SourcePackage: xorg
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/10/2017
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: M71 Ver. 01.19
  dmi.board.name: 2216
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: KBC Version 96.5B
  dmi.chassis.asset.tag: 5CG5296NT6
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: 
dmi:bvnHewlett-Packard:bvrM71Ver.01.19:bd04/10/2017:svnHewlett-Packard:pnHPEliteBook850G2:pvrA3009F510303:rvnHewlett-Packard:rn2216:rvrKBCVersion96.5B:cvnHewlett-Packard:ct10:cvr:
  dmi.product.name: HP EliteBook 850 G2
  dmi.product.version: A3009F510303
  dmi.sys.vendor: Hewlett-Packard
  version.compiz: compiz 1:0.9.12.2+16.04.20160823-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.76-1~ubuntu16.04.1
  version.libgl1-mesa-dri: libgl1-mesa-dri 17.0.7-0ubuntu0.16.04.1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 17.0.7-0ubuntu0.16.04.1
  version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-0ubuntu0.4
  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+git20160325-1ubuntu1.2
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:1.0.12-1build2
  xserver.bootTime: Fri Sep 15 19:49:06 2017
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                               13805 
   vendor                                     AUO
  xserver.version: 2:1.18.4-0ubuntu0.3

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