SUMMARY When using an external monitor, the framerate of KWin is half of what it should be. STEPS TO REPRODUCE 1. Run session under Wayland OBSERVED RESULT mostly 30 FPS (built-in "show FPS" desktop effect in Plasma) EXPECTED RESULT 60 FPS SOFTWARE/OS VERSIONS Operating System: openSUSE Tumbleweed 20240329 KDE Plasma Version: 6.0.3 KDE Frameworks Version: 6.0.0 Qt Version: 6.6.3 Kernel Version: 6.8.1-1-default (64-bit) Graphics Platform: Wayland Processors: 8 × AMD Ryzen 5 PRO 3500U w/ Radeon Vega Mobile Gfx Memory: 14.5 GiB of RAM Graphics Processor: AMD Radeon Vega 8 Graphics Manufacturer: LENOVO Product Name: 20NKS01Y00 System Version: ThinkPad T495 ADDITIONAL INFORMATION The external monitor is 3840 x 1600 @ 60 Hz On the internal monitor, everything is perfectly smooth at 1920 x 1080 @ 60 FPS
I noticed that the framerate is normal (60 fps) when the internal laptop screen is ON. For some reason, using only the external monitor makes the framerate worse...
So to sum up: internal screen only: OK internal screen + external screen: OK external screen only: low FPS
Please re-test this in Plasma 6.1 once it's out, it has several performance improvements and render scheduling fixes, which might fix this
Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please mark the bug as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone!
This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!