[Bug 2127674] [NEW] Screen resolution limited to 800x600 after update to 25.10

You have been subscribed to a public bug:

Hi,

I have a small 10 inch Notebook with a resolution of 1200x1920
(actually, for some unknown reason, they used a portrait mode LCD and
rotated it 90 degree to get the usual notebook landscape display,
therefore the screen needs to be set to "rotated" in Desktops)

It worked in full resolution under Kubuntu 25.04.

After updating to Kubuntu 25.10 (do-release-update -d) the screen
resolution is fixed to 800x600, and can't be changed in the kde
settings.

Seems as if the driver is gone and notebook now runs in standard VGA
mode.

btw., I do need kernel option nomodeset, otherwise screen remains black
after booting (both in 25.04 and 25.10)

regards

ProblemType: Bug
DistroRelease: Ubuntu 25.10
Package: kwin-wayland 4:6.4.5-0ubuntu3
ProcVersionSignature: Ubuntu 6.17.0-5.5-generic 6.17.0-rc7
Uname: Linux 6.17.0-5-generic x86_64
ApportVersion: 2.33.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Sat Oct 11 00:42:58 2025
InstallationDate: Installed on 2025-04-24 (169 days ago)
InstallationMedia: Kubuntu 25.04 "Plucky Puffin" - Release amd64 (20250417)
SourcePackage: kwin
UpgradeStatus: Upgraded to questing on 2025-10-10 (0 days ago)

** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete


** Tags: amd64 apport-bug questing wayland-session
--
Screen resolution limited to 800x600 after update to 25.10
https://bugs.launchpad.net/bugs/2127674
You received this bug notification because you are subscribed to linux in Ubuntu.