https://bugs.kde.org/show_bug.cgi?id=501316
Bug ID: 501316
Summary: 90-Hz high refresh rate no longer supported on laptop
screen
Classification: Plasma
Product: kwin
Version: git-stable-Plasma/6.3
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Created attachment 179273
--> https://bugs.kde.org/attachment.cgi?id=179273&action=edit
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.
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