Created attachment 182717 [details] Output from kscreen-doctor SUMMARY On a laptop with two 2560x1600 external screens, the resolution of one of the screens is refused applied, 1920x1200 works. STEPS TO REPRODUCE 1. Use the display configuration in system settings to configure order and resolution of screens. 2. When applying, the message "Couldn’t apply display configuration: The driver rejected the output configuration" appears; correct resolution is not applied. OBSERVED RESULT Resolutions of 1920x1200 or lower are accepted, the native resolution not. EXPECTED RESULT Native resolution applied. SOFTWARE/OS VERSIONS Operating System: Fedora Linux 42 KDE Plasma Version: 6.4.1 KDE Frameworks Version: 6.15.0 Qt Version: 6.9.1 Kernel Version: 6.13.12-200.fc41.x86_64 (64-bit) Graphics Platform: Wayland Processors: 4 × Intel® Core™ i7-6600U CPU @ 2.60GHz Memory: 16 GiB of RAM (15.4 GiB usable) Graphics Processor: Intel® HD Graphics 520 ADDITIONAL INFORMATION This worked correctly with Plasma versions through 6.3; after an update to 6.4.0, this bug appeared - and is also present in 6.4.1. Tried with different Linux kernels; same problem with 6.13.12, 6.14.x (various) and 6.15.3. Attempting to set the native resolution using kscreen-doctor gives a similar error message: $ kscreen-doctor output.DP-4.mode.45 applying config failed! The driver rejected the output configuration
Created attachment 182718 [details] System settings display configuration
After an upgrade today, which included KDE Frameworks 6.16.0, the problem is gone. Logged out after the upgrade, the screen could be set to native resolution when logging in again.
After an update to KDE Plasma 6.4.3 today, the problem is back, but on a different screen (the leftmost in the configuration).
Please report this at https://gitlab.freedesktop.org/drm/i915/kernel/-/issues - if the driver rejects the output config, there's nothing more we can do about it.