Public bug reported:
After upgrading from linux-image-7.0.0-31-generic to linux-
image-7.0.0-38-generic (via the standard Kubuntu/Ubuntu software update
tooling) I notice that some windows, such as chrome, konsole, and games,
exhibit a graphical flicker. Some details about this:
- The flicker is typically contained to one application window at a
time. For example, it's most noticeable in konsole (though, not only in
konsole) and if I have the app taking up 1/2 of my screen, it will only
flicker within that screen.
- I isolated the issue to something that has changed between linux-
image-7.0.0-31-generic and linux-image-7.0.0-38-generic. If I boot
(using GRUB) using linux-image-7.0.0-31-generic the flicker goes away.
If I boot using linux-image-7.0.0-38-generic, it comes back. This is
repeatable essentially 100% of the time.
- I also noticed (though, my testing is less comprehensive) that if I
boot into an x11 session, then I do not observe the flickering. I only
notice it in Wayland sessions.
- I tried to capture the flicker using a screen recording tool and it
does not actually show up in the recording, only visually on the display
itself.
My system uses a 9070 XT GPU and 9800 X3d CPU, if this matters.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-38-generic 7.0.0-38.38
ProcVersionSignature: Ubuntu 7.0.0-38.38-generic 7.0.14
Uname: Linux 7.0.0-38-generic x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC2: nmiodice 1988 F.... wireplumber
/dev/snd/controlC0: nmiodice 1988 F.... wireplumber
/dev/snd/controlC1: nmiodice 1988 F.... wireplumber
/dev/snd/seq: nmiodice 1983 F.... pipewire
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Sun Oct 4 12:03:52 2026
InstallationDate: Installed on 2026-09-08 (26 days ago)
InstallationMedia: Kubuntu 26.04.1 LTS "Resolute Raccoon" - Release amd64
(20260826.1)
MachineType: Micro-Star International Co., Ltd. MS-7E66
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-7.0.0-38-generic
root=UUID=8ff4698c-107e-497c-9bef-432652d910db ro rootflags=subvol=@ quiet
splash resume=UUID=d27565a4-d0c6-4f7a-bdb9-fe4d6f682b47
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/03/2026
dmi.bios.release: 5.41
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: 2.A44
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: PRO B850M-A WIFI (MS-7E66)
dmi.board.vendor: Micro-Star International Co., Ltd.
dmi.board.version: 2.0
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: 2.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInternational,LLC.:bvr2.A44:bd09/03/2026:br5.41:svnMicro-StarInternationalCo.,Ltd.:pnMS-7E66:pvr2.0:rvnMicro-StarInternationalCo.,Ltd.:rnPROB850M-AWIFI(MS-7E66):rvr2.0:cvnMicro-StarInternationalCo.,Ltd.:ct3:cvr2.0:skuTobefilledbyO.E.M.:pfaTobefilledbyO.E.M.:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: MS-7E66
dmi.product.sku: To be filled by O.E.M.
dmi.product.version: 2.0
dmi.sys.vendor: Micro-Star International Co., Ltd.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug regression-update resolute wayland-session
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https://bugs.launchpad.net/bugs/2169489
Title:
Graphical flickering after upgrading from linux-image-7.0.0-31-generic
to linux-image-7.0.0-38-generic
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