I totally understand, I have been using 2 screens since 2015 but I know many don't have a second screen, I noticed the suggested fixed after 1 reboot worked, but the second boot didn't honor the fix and the issue showed again.... at least it is not mission critical
On Sat, 28 Feb 2026, 00:35 Scarlett Gately Moore, < [email protected]> wrote: > Can't test right now, need another monitor.. > > ** Changed in: sddm (Ubuntu) > Importance: Undecided => Medium > > ** Changed in: sddm (Ubuntu) > Status: New => Triaged > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/2142661 > > Title: > SDDM display layout not updated when KDE display configuration is > changed > > Status in sddm package in Ubuntu: > Triaged > > Bug description: > Package: sddm > > Version: Ubuntu 25.10 (Questing) 0.21.0+git20250502.4fe234b-2ubuntu1 > > Description: > When a user configures their display layout in KDE System Settings → > Display and Monitor and clicks Apply, the configuration is saved to > ~/.config/kwinoutputconfig.json. However SDDM, which runs as its own system > user, has no access to this file and retains its own independent display > configuration. > On a dual monitor system this results in the SDDM login screen > displaying monitors in a different arrangement than the KDE desktop > session. Specifically, mouse cursor movement between monitors on the login > screen does not match the configured layout in the desktop session, making > the login screen confusing to use. > > Steps to reproduce: > > Install Kubuntu 25.10 on a system with two monitors > Configure monitor arrangement in KDE System Settings → Display and > Monitor, including relative positioning > Apply the configuration > Log out or reboot > Observe that the SDDM login screen uses a different monitor arrangement > than configured > > Expected behaviour: > SDDM should use the same monitor arrangement as configured in KDE > display settings, either by automatically syncing on apply, or by providing > a UI option to apply settings to the login screen. > > Actual behaviour: > SDDM retains its own independent display configuration. The workaround > requires manually copying ~/.config/kwinoutputconfig.json to > /var/lib/sddm/.config/kwinoutputconfig.json with correct ownership set to > the sddm user. > > Workaround: > in bash: sudo mkdir -p /var/lib/sddm/.config > sudo cp ~/.config/kwinoutputconfig.json > /var/lib/sddm/.config/kwinoutputconfig.json > sudo chown -R sddm:sddm /var/lib/sddm/.config > Additional information: > > Laptop screen: eDP-1 (1920x1080) > External monitor: HDMI-A-1 (1920x1080) > Session type: Wayland > > To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+source/sddm/+bug/2142661/+subscriptions > > -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2142661 Title: SDDM display layout not updated when KDE display configuration is changed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sddm/+bug/2142661/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
