After another instance of this hang, I have confirmed that networking
also stops when the freeze happens. I was hoping to be able to probe it
remotely, but no such luck.

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https://bugs.launchpad.net/bugs/1874846

Title:
  Xorg or more likely kernel/driver freeze

Status in linux package in Ubuntu:
  New

Bug description:
  The symptoms are that I am working normally, often with a remmina
  remote session open and suddenly everything stops. The keyboard will
  no longer response (caps-lock and Alt/SysRQ/reisub both have no
  effect. This started with kernel vmlinuz-5.3.0-46-generic and my
  current workaround is tu drop back to the previous -45 kernel which
  has been solid for about 4 weeks of fairly intense remote working.

  I think it is possibly another instance of existing bug 1872292 and
  I'm keen to help get you any diagnostic information I reasonably can.

  Description:  Ubuntu 18.04.4 LTS
  Release:      18.04

  Chris Ritson

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: xorg 1:7.7+19ubuntu7.1
  ProcVersionSignature: Ubuntu 5.3.0-45.37~18.04.1-generic 5.3.18
  Uname: Linux 5.3.0-45-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.14
  Architecture: amd64
  CompositorRunning: None
  Date: Fri Apr 24 16:43:08 2020
  DistUpgraded: Fresh install
  DistroCodename: bionic
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes
  GpuHangFrequency: Several times a week
  GpuHangReproducibility: Seems to happen randomly
  GpuHangStarted: Since a couple weeks or more
  GraphicsCard:
   Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx 
Integrated Graphics Controller [8086:22b1] (rev 21) (prog-if 00 [VGA 
controller])
     Subsystem: Intel Corporation Atom/Celeron/Pentium Processor 
x5-E8000/J3xxx/N3xxx Integrated Graphics Controller [8086:7270]
  InstallationDate: Installed on 2020-03-23 (32 days ago)
  InstallationMedia: Ubuntu-MATE 18.04.4 LTS "Bionic Beaver" - Release amd64 
(20200203.1)
  ProcEnviron:
   LANGUAGE=en_GB:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.3.0-45-generic 
root=/dev/mapper/ubuntu--mate--vg-root ro
  SourcePackage: xorg
  Symptom: display
  Title: Xorg freeze
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 06/01/2015
  dmi.bios.vendor: Intel Corp.
  dmi.bios.version: PYBSWCEL.86A.0031.2015.0601.1712
  dmi.board.name: NUC5PPYB
  dmi.board.vendor: Intel Corporation
  dmi.board.version: H76558-102
  dmi.chassis.type: 3
  dmi.modalias: 
dmi:bvnIntelCorp.:bvrPYBSWCEL.86A.0031.2015.0601.1712:bd06/01/2015:svn:pn:pvr:rvnIntelCorporation:rnNUC5PPYB:rvrH76558-102:cvn:ct3:cvr:
  version.compiz: compiz 1:0.9.13.1+18.04.20180302-0ubuntu1
  version.libdrm2: libdrm2 2.4.99-1ubuntu1~18.04.2
  version.libgl1-mesa-dri: libgl1-mesa-dri 19.2.8-0ubuntu0~18.04.3
  version.libgl1-mesa-glx: libgl1-mesa-glx 19.2.8-0ubuntu0~18.04.3
  version.xserver-xorg-core: xserver-xorg-core N/A
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
  version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A

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