Thank you for taking the time to report this bug and helping to make
Ubuntu better. It sounds like some part of the system has crashed. To
help us find the cause of the crash please follow these steps:

1. Look in /var/crash for crash files and if found run:
    ubuntu-bug YOURFILE.crash
Then tell us the ID of the newly-created bug.

2. If step 1 failed then look at https://errors.ubuntu.com/user/ID where
ID is the content of file /var/lib/whoopsie/whoopsie-id on the machine.
Do you find any links to recent problems on that page? If so then please
send the links to us.

3. If step 2 also failed then apply the workaround from bug 994921,
reboot, reproduce the crash, and retry step 1.

Please take care to avoid attaching .crash files to bugs as we are
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risk for yourself.


** Tags added: amdgpu

** Package changed: xorg (Ubuntu) => gnome-shell (Ubuntu)

** Changed in: gnome-shell (Ubuntu)
       Status: New => Incomplete

-- 
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https://bugs.launchpad.net/bugs/1932979

Title:
  blank screen with cursor after login

Status in gnome-shell package in Ubuntu:
  Incomplete

Bug description:
  Ubuntu 20.04 on amd64.

  I came back to the machine after it was idle long enough for the
  screen to go blank.  I can see the cursor move with the mouse, but
  nothing else.  This is VT2.

  VT1 shows a login screen.  I can get to console VTs as well and did so
  to file the report.

  I see the following in the system log that may be related:

  Jun 18 18:29:54 cerberus gnome-shell[4694]: g_signal_handler_disconnect: 
assertion 'handler_id > 0' failed
  Jun 18 18:29:54 cerberus gnome-shell[4694]: Source ID 3568871 was not found 
when attempting to remove it
  Jun 18 18:29:54 cerberus gnome-shell[4694]: Source ID 3568998 was not found 
when attempting to remove it
  Jun 18 18:29:54 cerberus gnome-shell[4694]: Source ID 3569045 was not found 
when attempting to remove it
  Jun 18 18:29:54 cerberus gnome-shell[4694]: [System monitor] applet disable
  Jun 18 18:29:54 cerberus gnome-shell[4694]: g_dbus_connection_emit_signal: 
assertion 'G_IS_DBUS_CONNECTION (connection)' failed

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: xorg 1:7.7+19ubuntu14
  ProcVersionSignature: Ubuntu 5.4.0-74.83-generic 5.4.114
  Uname: Linux 5.4.0-74-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.18
  Architecture: amd64
  CasperMD5CheckResult: skip
  Date: Fri Jun 18 19:33:55 2021
  DistUpgraded: 2020-11-04 10:03:47,100 DEBUG running doUpdate() 
(showErrors=True)
  DistroCodename: focal
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon RX 
470/480/570/570X/580/580X/590] [1002:67df] (rev c7) (prog-if 00 [VGA 
controller])
     Subsystem: ASUSTeK Computer Inc. Radeon RX 480 [1043:04fb]
  InstallationDate: Installed on 2020-05-29 (385 days ago)
  InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 
(20190805)
  MachineType: Supermicro X10DAi
  ProcEnviron:
   SHELL=/bin/bash
   LANG=en_US.UTF-8
   TERM=linux
   XDG_RUNTIME_DIR=<set>
   PATH=(custom, user)
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-74-generic 
root=/dev/mapper/ubuntu--vg-root ro amdgpu.dc=0
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: Upgraded to focal on 2020-11-04 (226 days ago)
  dmi.bios.date: 12/16/2019
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 3.2
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: X10DAI
  dmi.board.vendor: Supermicro
  dmi.board.version: 1.01
  dmi.chassis.asset.tag: To be filled by O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To be filled by O.E.M.
  dmi.chassis.version: To be filled by O.E.M.
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr3.2:bd12/16/2019:svnSupermicro:pnX10DAi:pvr123456789:rvnSupermicro:rnX10DAI:rvr1.01:cvnTobefilledbyO.E.M.:ct3:cvrTobefilledbyO.E.M.:
  dmi.product.family: SMC X10
  dmi.product.name: X10DAi
  dmi.product.sku: 083615D9
  dmi.product.version: 123456789
  dmi.sys.vendor: Supermicro
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.102-1ubuntu1~20.04.1
  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 2:1.20.9-2ubuntu1.2~20.04.2
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  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

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