Public bug reported:
I have a Lenovo P16 gen 4, and I am getting a random freeze of the
entire desktop (looks to be X11 freezing since all of my applications
lock up and stop taking input, not just the shell).
Occasionally it seems like the shell is locking up and not all of X11,
when X11 locks up I need to switch to another tty and restart sddm (if
on KDE).
Tried with both vanilla ubuntu with gnome 24.04 as well as KDE plasma
24.04.
What ended up resolving the issue was setting the following in grub:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash amdgpu.tmz=0
amdgpu.sg_display=0 amdgpu.dcdebugmask=0x10 iommu=soft"
So far I've not been able to reproduce under Wayland
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-image-6.17.0-1024-oem 6.17.0-1024.24
ProcVersionSignature: Ubuntu 6.17.0-1024.24-oem 6.17.13
Uname: Linux 6.17.0-1024-oem x86_64
ApportVersion: 2.28.1-0ubuntu3.8
Architecture: amd64
CasperMD5CheckResult: pass
Date: Tue Jul 7 14:39:48 2026
InstallationDate: Installed on 2026-05-29 (40 days ago)
InstallationMedia: Ubuntu 24.04.4 LTS "Noble Numbat" - Release amd64 (20260210)
SourcePackage: linux-signed-oem-6.17
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux-signed-oem-6.17 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble
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https://bugs.launchpad.net/bugs/2160074
Title:
UI lockup on X11
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