SUMMARY When playing a game on that display the framerate is bad even though the game is reporting 60fps. When I run the same game at the same settings on the internal laptop display everything works as expected. OBSERVED RESULT Kwin has trouble running games on the external monitor smoothly - mangohud reports 62fps but the gameplay feels more like 30. This issue disappears when running the game on the internal laptop screen. EXPECTED RESULT KWin should run the game same way on the external display like on the internal display. SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: Fedora 36 (available in About System) KDE Plasma Version: 5.25.4 KDE Frameworks Version: 5.96.0 Qt Version: 5.15.5 Device: Lenovo Yoga Slim 7 ProX 14IAH7
*** This bug has been marked as a duplicate of bug 452219 ***