Created attachment 148721 [details] qdbus org.kde.KWin /KWin supportInformation SUMMARY When having multiple monitors connected under a wayland session, after the screens time out, the monitor configuration resets. Both monitors will be mirrored instead of extended, and the framerate will be set to 60Hz instead of 144Hz. STEPS TO REPRODUCE 1. Setup two 1440p monitors at 144Hz, connected via displayport. Have one directly to the right of the other. 2. Enable Screen Energy Savings under Power Management and allow screens to go blank. 3. Wake up computer by touching the keyboard or mouse. 4. Observe that monitors are now mirrored instead of extended and that the frame rate is now set to 60Hz. OBSERVED RESULT Monitors are now mirrors of each other with reduced framerate of 60Hz. EXPECTED RESULT After waking up, the monitors should retain the configuration setup previously. SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 5.24.5 KDE Frameworks Version: 5.93.0 Qt Version: 5.15.3 Kernel Version: 5.17.5-zen1-1-zen (64-bit) Graphics Platform: Wayland Processors: 16 × AMD Ryzen 7 1700X Eight-Core Processor Memory: 15.6 GiB of RAM Graphics Processor: AMD Radeon RX Vega ADDITIONAL INFORMATION KDE support information attached.
I think an additional point that might be causing this bug is that both monitors are identified as "DP_FREESYNC 1" in the Display Configuration settings tab. They are identically named, and I think this is breaking the configuration upon waking. An additional point: The bug is not present when the system goes to sleep, only when the monitors are turned off for power savings.
I can confirm this problem. I too have two screens connected via Display Port that use the same identification string in the system settings screen. Operating System: KDE neon 5.25 KDE Plasma Version: 5.25.4 KDE Frameworks Version: 5.96.0 Qt Version: 5.15.5 Kernel Version: 5.18.15-051815-generic (64-bit) Graphics Platform: Wayland Processors: 24 × 12th Gen Intel® Core™ i9-12900K Memory: 62.6 GiB of RAM Graphics Processor: Mesa Intel® Graphics Manufacturer: Micro-Star International Co., Ltd. Product Name: MS-7D25 System Version: 1.0
Created attachment 151401 [details] Screenshot of the screen configuration
This is potentially fixed with https://invent.kde.org/plasma/kscreen/-/merge_requests/123 which is in Plasma 5.26 Please reopen if a bug persists.