It looks like using Nvidia on this laptop is optional. I wonder; can you
please uninstall the Nvidia driver and then tell us if the problem still
occurs?

If so, then please run:

  dpkg -l > allpackages.txt

and attach the resulting file 'allpackages.txt'.


** Package changed: xorg (Ubuntu) => xorg-server (Ubuntu)

** Summary changed:

- Xorg suddenly starts to consume 100% CPU, apparently triggered by Chrome
+ [nvidia] Xorg suddenly starts to consume 100% CPU, apparently triggered by 
Chrome

** Tags added: nvidia

** Also affects: nvidia-graphics-drivers-340 (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: nvidia-graphics-drivers-340 (Ubuntu)
       Status: New => Incomplete

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

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xorg-server in Ubuntu.
https://bugs.launchpad.net/bugs/1759714

Title:
  [nvidia] Xorg suddenly starts to consume 100% CPU, apparently
  triggered by Chrome

Status in nvidia-graphics-drivers-340 package in Ubuntu:
  Incomplete
Status in xorg-server package in Ubuntu:
  Incomplete

Bug description:
  I navigated to a website in Chrome (linledIn.com) and both Chrome and
  Xorg started consuming around 100% CPU each (one was actually
  significantly above 100% but I can't remember which one).

  Then I closed Chrome entirely (and I check there was no Chrome process
  left), but Xorg kept consuming around 100% CPU. No other process was.

  I closed all applications I had opened, but nothing stopped Xorg from
  consuming around 100% CPU while nobody was doing nothing. I had to
  kill Xorg.

  It might have been a complete coincidence that Xorg's crazy CPU usage
  started when I opened that website in Chrome, or it might actually
  have been caused by it, even by a bug in Chrome. But even if that is
  the case, if an application can cause Xorg to consume 100% CPU and
  then not stop even after the application has been closed, that is a
  bug in Xorg.

  
  Also, something quite similar happens to me very often:
  sometimes I open Google Maps in Chrome and (not every time, far from it), the 
same as described above happens, that is, both Chrome and Xorg start consuming 
a lot of CPU. However, in those cases, usually when I close Chrome, Xorg's CPU 
consumptions goes back to normal (and then I'm able to reopen Chrome and 
everything works normally).
  This was the first time that Xorg's abnormal CPU consumption persisted after 
closing Chrome which seemed to have triggered it.

  
  I'm not sure whether the two cases are actually caused by the same issue or 
not.

  I know I'm providing little information but this is all I have.

  Note that the issue is critical.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: xorg 1:7.7+13ubuntu3
  ProcVersionSignature: Ubuntu 4.4.0-116.140-generic 4.4.98
  Uname: Linux 4.4.0-116-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia
  .proc.driver.nvidia.gpus.0000.01.00.0: Error: [Errno 21] Is a directory: 
'/proc/driver/nvidia/gpus/0000:01:00.0'
  .proc.driver.nvidia.registry: Binary: ""
  .proc.driver.nvidia.version:
   NVRM version: NVIDIA UNIX x86_64 Kernel Module  340.104  Thu Sep 14 17:13:13 
PDT 2017
   GCC version:  gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.9)
  .tmp.unity_support_test.0:
   
  ApportVersion: 2.20.1-0ubuntu2.15
  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: Thu Mar 29 00:50:20 2018
  DistUpgraded: Fresh install
  DistroCodename: xenial
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, if not too technical
  GraphicsCard:
   Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] 
(rev 09) (prog-if 00 [VGA controller])
     Subsystem: Acer Incorporated [ALI] 3rd Gen Core processor Graphics 
Controller [1025:0647]
   NVIDIA Corporation GF117M [GeForce 610M/710M/810M/820M / GT 
620M/625M/630M/720M] [10de:1140] (rev a1) (prog-if 00 [VGA controller])
     Subsystem: Acer Incorporated [ALI] GeForce 710M [1025:0691]
  InstallationDate: Installed on 2013-10-11 (1629 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  MachineType: Acer Aspire V3-571G
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-116-generic.efi.signed 
root=UUID=5830b30e-69e8-4bb4-8a2b-bc2b43c7414a ro quiet splash vt.handoff=7
  SourcePackage: xorg
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/15/2012
  dmi.bios.vendor: Acer
  dmi.bios.version: V2.07
  dmi.board.asset.tag: Type2 - Board Asset Tag
  dmi.board.name: VA50_HC_CR
  dmi.board.vendor: Acer
  dmi.board.version: Type2 - Board Version
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: V2.07
  dmi.modalias: 
dmi:bvnAcer:bvrV2.07:bd10/15/2012:svnAcer:pnAspireV3-571G:pvrV2.07:rvnAcer:rnVA50_HC_CR:rvrType2-BoardVersion:cvnAcer:ct10:cvrV2.07:
  dmi.product.name: Aspire V3-571G
  dmi.product.version: V2.07
  dmi.sys.vendor: Acer
  version.compiz: compiz 1:0.9.12.3+16.04.20180221-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.83-1~16.04.1
  version.libgl1-mesa-dri: libgl1-mesa-dri 17.2.8-0ubuntu0~16.04.1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 17.2.8-0ubuntu0~16.04.1
  version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-0ubuntu0.7
  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: Thu Mar 29 00:45:01 2018
  xserver.configfile: /etc/X11/xorg.conf
  xserver.errors:
   NVIDIA(0): Failed to initiate mode change.
   NVIDIA(0): Failed to complete mode change
  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.18.4-0ubuntu0.7

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