Created attachment 179273 [details] Display configuration SUMMARY I have Lenovo Thinkpad T14s (gen 4) with AMD Ryzen 7 PRO 7840U with a 90-Hz OLED panel. Until very recently I was able to run it at 90 Hz. It was actual 90 Hz, as the screen was noticeably smoother compared to the usual 60 Hz. But after a recent update it's stuck at 60 Hz. There is a tooltip next to the refresh rate in Display configuration which states ""60 Hz" is the only refresh rate supported by this display". I cannot even lower the refresh rate, which I believe was before possible. Note that this laptop was not marketed as supporting 90 Hz. Windows officially only allows 60 Hz but with some tweaks users were able to unlock 90 Hz as the hardware is clearly capable of that. Linux has supported 90 Hz out of the box. STEPS TO REPRODUCE 1. Open Display configuration 2. Select the native resolution 3. Try to set the refresh rate to 90 Hz OBSERVED RESULT It is not possible. EXPECTED RESULT It should be possible. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Fedora Linux 41 KDE Plasma Version: 6.3.2 KDE Frameworks Version: 6.11.0 Qt Version: 6.8.2 I'm using Wayland.
Which modes are supported is decided by the display driver and not KWin, please report this at https://gitlab.freedesktop.org/drm/amd/-/issues
Ah, I see. Thanks for the pointers. In case somebody comes across this, I raised it here: https://gitlab.freedesktop.org/drm/amd/-/issues/4038