Public bug reported:
After the update from 7.0.0-34-generic to 7.0.0-38-generic (Oct 2,
2026), I get short flashes of screen corruption on my desktop. When you
move around windows or sometimes random, blocks of colored noise appear.
Regression:
- 7.0.0-34-generic: no corruption
- 7.0.0-38-generic: corruption, intermittent
- Windows 11 on the same machine (dual boot): no corruption, so hardware seems
fine
Trigger:
- Launching VS Code (Electron/Chromium) triggerd it.
- Otherwise it is intermittent and can disappear for a while.
System:
- Kubuntu 26.04, Plasma 6.6.6, Wayland session
- Mesa 26.0.8-1ubuntu0.3
- GPU: AMD Radeon RX 7600 XT [1002:7480], DCN 3.2.1
- CPU: Ryzen 5 7600, integrated GPU [1002:164e] enabled but no display connected
- DP-1: LG UltraGear 1920x1080 @ 179.96 Hz, VRR Automatic, 10 bpc
- DP-2: Dell U2419H 1920x1080 @ 60 Hz, VRR incapable
Kernel log on 7.0.0-38 (no GPU resets or ring timeouts):
workqueue: dm_handle_vmin_vmax_update [amdgpu] hogged CPU for >10000us 131
times, consider switching to WQ_UNBOUND
Tried on 7.0.0-38 (brief tests only, since the issue is intermittent):
VRR set to Never, 8 bpc, tearing disabled, 144 Hz. None clearly fixed
it.
Workaround: booting 7.0.0-34-generic.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-34-generic 7.0.0-34.34
ProcVersionSignature: Ubuntu 7.0.0-34.34-generic 7.0.14
Uname: Linux 7.0.0-34-generic x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Sat Oct 3 12:21:30 2026
InstallationDate: Installed on 2024-10-20 (712 days ago)
InstallationMedia: Kubuntu 24.10 "Oracular Oriole" - Release amd64 (20241007.6)
MachineType: Micro-Star International Co., Ltd. MS-7E26
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-34-generic
root=UUID=634abc01-8b3c-4d75-baeb-4749e779b55f ro quiet splash
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
SourcePackage: linux
UpgradeStatus: Upgraded to resolute on 2026-05-15 (141 days ago)
dmi.bios.date: 12/27/2024
dmi.bios.release: 5.35
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: 1.I0
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: B650 GAMING PLUS WIFI (MS-7E26)
dmi.board.vendor: Micro-Star International Co., Ltd.
dmi.board.version: 1.0
dmi.chassis.asset.tag: To be filled by O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: Micro-Star International Co., Ltd.
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInternational,LLC.:bvr1.I0:bd12/27/2024:br5.35:svnMicro-StarInternationalCo.,Ltd.:pnMS-7E26:pvr1.0:rvnMicro-StarInternationalCo.,Ltd.:rnB650GAMINGPLUSWIFI(MS-7E26):rvr1.0:cvnMicro-StarInternationalCo.,Ltd.:ct3:cvr1.0:skuTobefilledbyO.E.M.:pfaTobefilledbyO.E.M.:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: MS-7E26
dmi.product.sku: To be filled by O.E.M.
dmi.product.version: 1.0
dmi.sys.vendor: Micro-Star International Co., Ltd.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2169402
Title:
Kernel 7.0.0-38 regression: screen corruption flashes on RX 7600 XT
(Wayland, VRR), 7.0.0-34 unaffected
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2169402/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
