Status changed to 'Confirmed' because the bug affects multiple users.

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

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https://bugs.launchpad.net/bugs/1774652

Title:
  xorg stopped responding to keyboard. Killing xorg "fixed" it

Status in xorg package in Ubuntu:
  Confirmed

Bug description:
  I booted Ubuntu, and when I started using it, nothing would respond to the 
keyboard. Everything was responding normally to the mouse.
  It looked like the keystrokes were being "buffered" extremely slowly, I'll 
explain:

  For example, I opened Chrome and I started typing "facebook" in the
  address bar, but no character showed up, as if the keyboard wasn't
  even connected (however, I had used the same keyboard to type my
  password to log in and that had worked).

  So I opened a terminal, and then the characters "fa" showed up on the
  command line: that is two of the several characters that I had typed
  almost a minute before into another application.

  Then I started hitting keys randomly on my keyboard, like "lksjdbljb",
  and opening several applications (e.g. open Thunderbird, click "new
  message" - remember, the mouse was responding - and type random
  characters into the "to" address). With several seconds of delay, some
  other random characters that I had typed minutes before in another app
  would show up.

  That is, keyboard totally unusable, as if the keystroke buffer was
  slow. And this would happen with both the laptop's builtin keyboard
  and the external one connected via USB.

  
  I hit Ctrl+Alt+F1 (which responded immediately) to open a virtual terminal. I 
logged in on the virtual terminal, where the keyboard(s) would respond 
perfectly.
  I ran "top", and there was no process consuming an abnormal amount of CPU.

  I tried killing the "at-spi2-registr" process which was second in the
  list with like 2% CPU consumption and had caused me problems before
  (see #1772109), but that didn't help (I switched back to my xorg
  session via ctrl+alt+f7 and the keyboard was still berserk there).

  So finally I killed xorg, which obviously logged me out, and after I
  logged back in everything was working normally.

  
  About half of the fucking times I boot or reboot, the system is unusable due 
to some bug like this. Now this is a new one. Fucking pathetic.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: xorg 1:7.7+13ubuntu3
  ProcVersionSignature: Ubuntu 4.4.0-124.148-generic 4.4.117
  Uname: Linux 4.4.0-124-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: 2.20.1-0ubuntu2.17
  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: Fri Jun  1 15:59:54 2018
  DistUpgraded: Fresh install
  DistroCodename: xenial
  DistroVariant: ubuntu
  DpkgLog:
   
  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 (1693 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  MachineType: Acer Aspire V3-571G
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-124-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: Fri Jun  1 15:59:16 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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