https://bugs.kde.org/show_bug.cgi?id=477987
Bug ID: 477987
Summary: The refresh rate is half that of an external monitor.
Plasma 6 Beta
Classification: Plasma
Product: kwin
Version: 5.90.0
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: je...@jmarin.dev
Target Milestone: ---
SUMMARY
***
NOTE: If you are reporting a crash, please try to attach a backtrace with debug
symbols.
See
https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports
***
STEPS TO REPRODUCE
1. Connect an external display.
2. Set the FPS to 60 or 50.
OBSERVED RESULT
On the external display you will have at most half of the selected FPS.
EXPECTED RESULT
Get the selected fps and not half of them.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux. Plasma 6 beta
(available in About System)
KDE Plasma Version: 5.90.0
KDE Frameworks Version: 5.246.0
Qt Version: 6.6.1
ADDITIONAL INFORMATION
My computer uses two graphics cards, the nvidia graphics (GeForce GTX 1050
Mobile) and the intel integrated one. In KDE Plasma 5 this bug was fixed with
the following flag in /etc/environment : KWIN_DRM_USE_MODIFIERS=0.
I've been looking at other similar bugs where they tried using these others:
KWIN_DRM_DISABLE_BUFFER_READABILITY_CHECKS=1.
KWIN_DRM_PREFER_COLOR_DEPTH=24
KWIN_DRM_NO_AMS=1
All unsuccessful.
I provide you with the qdbus information in case it is relevant:
https://pastebin.com/raw/jM79m5yt
Best regards,
Jesus.
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