Public bug reported:

System
Description:    Ubuntu 20.04.1 LTS
Release:        20.04

Description:
Plugging in USB hub with peripherals while system is running causes gradual lag 
of a visual response, until freezing. usually takes < 1 min.  Only work around 
is to sleep system between plugging in hub.

I thought I fixed it by change DM but the issue has persisted.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-64.72-generic 5.4.78
Uname: Linux 5.4.0-64-generic x86_64
.tmp.unity_support_test.0:

ApportVersion: 2.20.11-0ubuntu27.14
Architecture: amd64
CasperMD5CheckResult: skip
CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Wed Jan 27 14:27:12 2021
DistUpgraded: 2020-04-28 14:42:33,856 DEBUG Running PostInstallScript: 
'./xorg_fix_proprietary.py'
DistroCodename: focal
DistroVariant: ubuntu
DkmsStatus:
 acpi-call, 1.1.0, 5.4.0-62-generic, x86_64: installed
 acpi-call, 1.1.0, 5.4.0-64-generic, x86_64: installed
 acpi-call, 1.1.0, 5.4.0-65-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GpuHangFrequency: Several times a day
GpuHangReproducibility: Yes, I can easily reproduce it
GpuHangStarted: Since a couple weeks or more
GraphicsCard:
 Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 
09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo 3rd Gen Core processor Graphics Controller [17aa:21fa]
InstallationDate: Installed on 2018-12-25 (763 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
MachineType: LENOVO 2324AS7
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-64-generic 
root=UUID=957184f1-8feb-4ca9-ac97-3fb70937b4ac ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
UpgradeStatus: Upgraded to focal on 2020-04-28 (274 days ago)
dmi.bios.date: 04/11/2018
dmi.bios.vendor: LENOVO
dmi.bios.version: G2ETB2WW (2.72 )
dmi.board.asset.tag: Not Available
dmi.board.name: 2324AS7
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: 
dmi:bvnLENOVO:bvrG2ETB2WW(2.72):bd04/11/2018:svnLENOVO:pn2324AS7:pvrThinkPadX230:rvnLENOVO:rn2324AS7:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.family: ThinkPad X230
dmi.product.name: 2324AS7
dmi.product.sku: LENOVO_MT_2324
dmi.product.version: ThinkPad X230
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.14.1+20.04.20200211-0ubuntu1
version.libdrm2: libdrm2 2.4.102-1ubuntu1~ppa1
version.libgl1-mesa-dri: libgl1-mesa-dri 20.2.6-0ubuntu0.20.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx 20.2.6-0ubuntu0.20.04.1
version.xserver-xorg-core: xserver-xorg-core 2:1.20.9-2ubuntu1.2~20.04.1
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: Tue Nov 24 16:32:27 2020
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.20.8-2ubuntu2.4
xserver.video_driver: modeset

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


** Tags: amd64 apport-bug focal freeze third-party-packages ubuntu 
wayland-session

** Description changed:

  System
  Description:  Ubuntu 20.04.1 LTS
  Release:      20.04
  
  Description:
  Plugging in USB hub with peripherals while system is running causes gradual 
lag of a visual response, until freezing. usually takes < 1 min.  Only work 
around is to sleep system between plugging in hub.
  
- I thought I fixed it by change DE but the issue has persisted.
+ I thought I fixed it by change DM but the issue has persisted.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: xorg 1:7.7+19ubuntu14
  ProcVersionSignature: Ubuntu 5.4.0-64.72-generic 5.4.78
  Uname: Linux 5.4.0-64-generic x86_64
  .tmp.unity_support_test.0:
-  
+ 
  ApportVersion: 2.20.11-0ubuntu27.14
  Architecture: amd64
  CasperMD5CheckResult: skip
  CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: None
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Jan 27 14:27:12 2021
  DistUpgraded: 2020-04-28 14:42:33,856 DEBUG Running PostInstallScript: 
'./xorg_fix_proprietary.py'
  DistroCodename: focal
  DistroVariant: ubuntu
  DkmsStatus:
-  acpi-call, 1.1.0, 5.4.0-62-generic, x86_64: installed
-  acpi-call, 1.1.0, 5.4.0-64-generic, x86_64: installed
-  acpi-call, 1.1.0, 5.4.0-65-generic, x86_64: installed
+  acpi-call, 1.1.0, 5.4.0-62-generic, x86_64: installed
+  acpi-call, 1.1.0, 5.4.0-64-generic, x86_64: installed
+  acpi-call, 1.1.0, 5.4.0-65-generic, x86_64: installed
  ExtraDebuggingInterest: Yes
  GpuHangFrequency: Several times a day
  GpuHangReproducibility: Yes, I can easily reproduce it
  GpuHangStarted: Since a couple weeks or more
  GraphicsCard:
-  Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] 
(rev 09) (prog-if 00 [VGA controller])
-    Subsystem: Lenovo 3rd Gen Core processor Graphics Controller [17aa:21fa]
+  Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] 
(rev 09) (prog-if 00 [VGA controller])
+    Subsystem: Lenovo 3rd Gen Core processor Graphics Controller [17aa:21fa]
  InstallationDate: Installed on 2018-12-25 (763 days ago)
  InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 
(20170801)
  MachineType: LENOVO 2324AS7
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-64-generic 
root=UUID=957184f1-8feb-4ca9-ac97-3fb70937b4ac ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  Title: Xorg freeze
  UpgradeStatus: Upgraded to focal on 2020-04-28 (274 days ago)
  dmi.bios.date: 04/11/2018
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G2ETB2WW (2.72 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 2324AS7
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: 
dmi:bvnLENOVO:bvrG2ETB2WW(2.72):bd04/11/2018:svnLENOVO:pn2324AS7:pvrThinkPadX230:rvnLENOVO:rn2324AS7:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.family: ThinkPad X230
  dmi.product.name: 2324AS7
  dmi.product.sku: LENOVO_MT_2324
  dmi.product.version: ThinkPad X230
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.14.1+20.04.20200211-0ubuntu1
  version.libdrm2: libdrm2 2.4.102-1ubuntu1~ppa1
  version.libgl1-mesa-dri: libgl1-mesa-dri 20.2.6-0ubuntu0.20.04.1
  version.libgl1-mesa-glx: libgl1-mesa-glx 20.2.6-0ubuntu0.20.04.1
  version.xserver-xorg-core: xserver-xorg-core 2:1.20.9-2ubuntu1.2~20.04.1
  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: Tue Nov 24 16:32:27 2020
  xserver.configfile: default
  xserver.errors:
-  
+ 
  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.20.8-2ubuntu2.4
  xserver.video_driver: modeset

-- 
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which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1913453

Title:
  Xorg freeze

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