Also...

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.

** Package changed: xorg (Ubuntu) => ubuntu

** Changed in: ubuntu
       Status: New => Incomplete

** Tags added: black-screen

** Summary changed:

- [amdgpu] Blackscreen when swtching users
+ [amdgpu] Black screen when switching users

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1882857

Title:
  [amdgpu] Black screen when switching users

Status in Ubuntu:
  Incomplete

Bug description:
  When i use in the menu "switch user" I go to the login dialog, cohose
  different user, enter the password (or use fingerprint reader) then
  the screen gets black and nothing happens. I cannot login and must
  reboot the laptop to login again.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: xorg 1:7.7+19ubuntu14
  ProcVersionSignature: Ubuntu 5.4.0-33.37-generic 5.4.34
  Uname: Linux 5.4.0-33-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.2
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  CasperMD5CheckResult: skip
  CompositorRunning: None
  CurrentDesktop: KDE
  Date: Wed Jun 10 01:23:10 2020
  DistUpgraded: Fresh install
  DistroCodename: focal
  DistroVariant: ubuntu
  ExtraDebuggingInterest: I just need to know a workaround
  GraphicsCard:
   Advanced Micro Devices, Inc. [AMD/ATI] Picasso [1002:15d8] (rev d2) (prog-if 
00 [VGA controller])
     Subsystem: Lenovo Picasso [17aa:5125]
  InstallationDate: Installed on 2020-05-17 (23 days ago)
  InstallationMedia: Kubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  MachineType: LENOVO 20NKS01Y00
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-33-generic 
root=UUID=ed4f23e0-6712-4e26-a125-0da798c01065 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/19/2020
  dmi.bios.vendor: LENOVO
  dmi.bios.version: R12ET50W(1.20 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20NKS01Y00
  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: None
  dmi.modalias: 
dmi:bvnLENOVO:bvrR12ET50W(1.20):bd02/19/2020:svnLENOVO:pn20NKS01Y00:pvrThinkPadT495:rvnLENOVO:rn20NKS01Y00:rvrNotDefined:cvnLENOVO:ct10:cvrNone:
  dmi.product.family: ThinkPad T495
  dmi.product.name: 20NKS01Y00
  dmi.product.sku: LENOVO_MT_20NK_BU_Think_FM_ThinkPad T495
  dmi.product.version: ThinkPad T495
  dmi.sys.vendor: LENOVO
  version.compiz: compiz N/A
  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 N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2.1
  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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