Public bug reported:

The issue is triggered by waking my notebook up after suspending. After that 
CPU is loaded heavily, and I have to re-boot.  The computer does not shut down 
properly and I have to press the button to turn it off.
After re-booting I do not have this issue until I suspend my notebook again.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-28.32-generic 5.4.30
Uname: Linux 5.4.0-28-generic x86_64
NonfreeKernelModules: nvidia_modeset 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.suspend: suspend hibernate resume
.proc.driver.nvidia.suspend_depth: default modeset uvm
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module  440.64  Fri Feb 21 01:17:26 
UTC 2020
 GCC version:  gcc version 9.3.0 (Ubuntu 9.3.0-10ubuntu2)
.tmp.unity_support_test.0:
 
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
BootLog:
 
CasperMD5CheckResult: skip
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:Unity7:ubuntu
Date: Tue May  5 10:21:00 2020
DistUpgraded: 2020-04-24 12:29:55,077 DEBUG Running PostInstallScript: 
'./xorg_fix_proprietary.py'
DistroCodename: focal
DistroVariant: ubuntu
DkmsStatus:
 nvidia, 440.64, 5.4.0-28-generic, x86_64: installed
 wireguard, 1.0.20200413, 5.4.0-26-generic, x86_64: installed (WARNING! Diff 
between built and installed module!)
 wireguard, 1.0.20200413, 5.4.0-28-generic, x86_64: installed (WARNING! Diff 
between built and installed module!)
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation HD Graphics 620 [8086:5916] (rev 02) (prog-if 00 [VGA 
controller])
   Subsystem: Hewlett-Packard Company HD Graphics 620 [103c:8234]
   Subsystem: Hewlett-Packard Company GM108M [GeForce 930MX] [103c:8235]
InstallationDate: Installed on 2018-01-06 (849 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
MachineType: HP HP ProBook 470 G4
MonitorsUser.xml:
 <monitors version="2">
 </monitors>
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-28-generic 
root=UUID=5ac056d5-340c-477d-9cd9-1f55a90552ae ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to focal on 2020-04-24 (10 days ago)
dmi.bios.date: 10/17/2017
dmi.bios.vendor: HP
dmi.bios.version: P85 Ver. 01.08
dmi.board.name: 8234
dmi.board.vendor: HP
dmi.board.version: KBC Version 42.6A
dmi.chassis.asset.tag: 5CD724DH2V
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.modalias: 
dmi:bvnHP:bvrP85Ver.01.08:bd10/17/2017:svnHP:pnHPProBook470G4:pvr:rvnHP:rn8234:rvrKBCVersion42.6A:cvnHP:ct10:cvr:
dmi.product.family: 103C_5336AN HP ProBook
dmi.product.name: HP ProBook 470 G4
dmi.product.sku: W6R39AV
dmi.sys.vendor: HP
version.compiz: compiz 1:0.9.14.1+20.04.20200211-0ubuntu1
version.libdrm2: libdrm2 2.4.101-2
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.4-2ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 20.0.4-2ubuntu1
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.6-1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1
xserver.bootTime: Mon May  4 11:37:08 2020
xserver.configfile: default
xserver.errors:
 
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.20.8-2ubuntu2

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug compiz-0.9 focal performance ubuntu

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https://bugs.launchpad.net/bugs/1876867

Title:
  Xorg process loads CPU heavily after resuming suspended laptop HP
  Probook 470 G4

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