Thanks for the bug report. It sounds like GNOME (in the mutter component) has frozen. When this happens the cursor will still move because it is managed by the Xorg process, but the screen contents are managed by the gnome-shell process.
Please try removing DisplayLink from the equation by unplugging your dock or any other USB display adapter. Does the bug still occur using only the laptop screen? ** Tags added: displaylink evdi ** Package changed: xorg (Ubuntu) => mutter (Ubuntu) ** Changed in: mutter (Ubuntu) Status: New => Incomplete ** Summary changed: - Xorg freeze + Screen freeze -- 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/1957181 Title: Screen freeze Status in mutter package in Ubuntu: Incomplete Bug description: When having more than one window open, e.g. Firefox and a terminal and then to swap between the two. The clicking with the mouse stops working but it still moves. For instance when I hover over text or not the cursor does not change. Sometimes I can still click or select text in the original window but the coordinates of the mouse are not where the cursor is displayed. Sometimes the keyboard dies too e.g. Alt+F2 does not work. Killing XOrg (if possible) seems to revert things to a working state. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: xorg 1:7.7+19ubuntu14 ProcVersionSignature: Ubuntu 5.4.0-92.103-generic 5.4.157 Uname: Linux 5.4.0-92-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.21 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CasperMD5CheckResult: skip CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Wed Jan 12 15:24:16 2022 DistUpgraded: 2020-09-07 08:54:13,457 DEBUG Running PostInstallScript: './xorg_fix_proprietary.py' DistroCodename: focal DistroVariant: ubuntu DkmsStatus: evdi, 1.7.0, 4.15.0-70-generic, x86_64: installed evdi, 1.7.0, 5.4.0-91-generic, x86_64: installed evdi, 1.7.0, 5.4.0-92-generic, x86_64: installed ExtraDebuggingInterest: Yes GpuHangFrequency: Continuously GpuHangReproducibility: Occurs more often under certain circumstances GpuHangStarted: Today GraphicsCard: Intel Corporation UHD Graphics 620 [8086:5917] (rev 07) (prog-if 00 [VGA controller]) Subsystem: Lenovo UHD Graphics 620 [17aa:225c] InstallationDate: Installed on 2019-02-13 (1063 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) MachineType: LENOVO 20KGS5DU00 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-92-generic root=UUID=c1172559-29d0-4c7c-bfab-574068d6d5cc ro quiet splash,psmouse.synaptics_intertouch=1 SourcePackage: xorg Symptom: display Title: Xorg freeze UpgradeStatus: Upgraded to focal on 2020-09-07 (492 days ago) acpidump: Error: command ['pkexec', '/usr/share/apport/dump_acpi_tables.py'] failed with exit code 126: Error executing command as another user: Request dismissed dmi.bios.date: 10/13/2020 dmi.bios.vendor: LENOVO dmi.bios.version: N23ET75W (1.50 ) dmi.board.asset.tag: Not Available dmi.board.name: 20KGS5DU00 dmi.board.vendor: LENOVO dmi.board.version: SDK0J40697 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN23ET75W(1.50):bd10/13/2020:svnLENOVO:pn20KGS5DU00:pvrThinkPadX1Carbon6th:rvnLENOVO:rn20KGS5DU00:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad X1 Carbon 6th dmi.product.name: 20KGS5DU00 dmi.product.sku: LENOVO_MT_20KG_BU_Think_FM_ThinkPad X1 Carbon 6th dmi.product.version: ThinkPad X1 Carbon 6th dmi.sys.vendor: LENOVO version.compiz: compiz 1:0.9.14.1+20.04.20200211-0ubuntu1 version.libdrm2: libdrm2 2.4.105-3~20.04.2 version.libgl1-mesa-dri: libgl1-mesa-dri 21.0.3-0ubuntu0.3~20.04.5 version.libgl1-mesa-glx: libgl1-mesa-glx 21.0.3-0ubuntu0.3~20.04.5 version.xserver-xorg-core: xserver-xorg-core 2:1.20.13-1ubuntu1~20.04.2 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1957181/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp