Please wait until the problem happens again and then collect a fresh system log:
journalctl -b0 > journal.txt or if you had to reboot after it happened run: journalctl -b-1 > prevboot.txt and then attach the resulting file here. Please also follow the instructions in comment #3. ** Changed in: mutter (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/1871475 Title: [amdgpu] Black screen after screen lock Status in mutter package in Ubuntu: Incomplete Bug description: When I lock the screen with "Windows" + "L" key combination the screen gets locked, but I expect it to stay on and be locked. In Ubuntu 20.04. when I do it the screen gets locked but get immediately black a sit would be in standby. The screen should stay on and show locked screen. This black screen happens often, but sometimes not. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: xorg 1:7.7+19ubuntu14 ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27 Uname: Linux 5.4.0-21-generic x86_64 ApportVersion: 2.20.11-0ubuntu24 Architecture: amd64 BootLog: Error: [Errno 13] Keine Berechtigung: '/var/log/boot.log' CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Tue Apr 7 20:51:27 2020 DistUpgraded: Fresh install DistroCodename: focal DistroVariant: ubuntu ExtraDebuggingInterest: No 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 2020-04-02 (4 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200401) MachineType: LENOVO 20NKS01Y00 ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=de_DE.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-21-generic root=UUID=024c6306-92b0-4cf4-88de-71e1f0671318 ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/28/2019 dmi.bios.vendor: LENOVO dmi.bios.version: R12ET46W(1.16 ) 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:bvrR12ET46W(1.16):bd10/28/2019: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 2.4.100-4 version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.4-1ubuntu1 version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core 2:1.20.7-2ubuntu2 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+git20190815-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1871475/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp