Unity accepts no user input after upgrade to 24.04

[Alistair Cunningham]

After upgrading Ubuntu from 23.10 to 24.04, and logging into Unity, the mouse appears and can be moved as normal, but no menus appear, clicking the mouse buttons does nothing, and no key presses do anything, not even ctrl-alt-del. It is impossible to launch any applications, or even log out cleanly.

The only way to escape is to press and hold the computers power button for a few seconds to force a hard reboot, and then when the computer boots again select Ubuntu on wayland rather than Unity.

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: unity 7.7.0+23.04.20230222.2-0ubuntu7
ProcVersionSignature: Ubuntu 6.8.0-22.22-generic 6.8.1
Uname: Linux 6.8.0-22-generic x86_64
.tmp.unity_support_test.0:

ApportVersion: 2.28.0-0ubuntu1
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: unknown
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Fri Apr 12 09:34:48 2024
DistUpgraded: 2024-04-11 17:46:55,532 DEBUG migrateToDeb822Sources()
DistroCodename: noble
DistroVariant: ubuntu
GraphicsCard:
 Intel Corporation CometLake-U GT2 [UHD Graphics] [8086:9b41] (rev 02) (prog-if 00 [VGA controller])
   Subsystem: Lenovo CometLake-U GT2 [UHD Graphics] [17aa:22be]
InstallationDate: Installed on 2020-07-14 (1368 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
MachineType: LENOVO 20U9CTO1WW
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.8.0-22-generic root=UUID=42d20f5a-04dd-4073-ac83-e07bd283a1d1 ro loglevel=4 splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: Upgraded to noble on 2024-04-11 (1 days ago)
dmi.bios.date: 08/30/2022
dmi.bios.release: 1.28
dmi.bios.vendor: LENOVO
dmi.bios.version: N2WET38W (1.28 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20U9CTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0R32862 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.15
dmi.modalias: dmi:bvnLENOVO:bvrN2WET38W(1.28):bd08/30/2022:br1.28:efr1.15:svnLENOVO:pn20U9CTO1WW:pvrThinkPadX1CarbonGen8:rvnLENOVO:rn20U9CTO1WW:rvrSDK0R32862WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20U9_BU_Think_FM_ThinkPadX1CarbonGen8:
dmi.product.family: ThinkPad X1 Carbon Gen 8
dmi.product.name: 20U9CTO1WW
dmi.product.sku: LENOVO_MT_20U9_BU_Think_FM_ThinkPad X1 Carbon Gen 8
dmi.product.version: ThinkPad X1 Carbon Gen 8
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.14.2+22.10.20220822-0ubuntu12
version.libdrm2: libdrm2 2.4.120-2
version.libgl1-mesa-dri: libgl1-mesa-dri 24.0.3-1ubuntu4
version.libgl1-mesa-glx: libgl1-mesa-glx 23.0.4-0ubuntu1~23.04.1
version.xserver-xorg-core: xserver-xorg-core 2:21.1.11-2ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:22.0.0-1build1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20210115-1build1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-2build1