https://bugs.kde.org/show_bug.cgi?id=491916
Bug ID: 491916
Summary: Monitor can't understand signal after closing or
minimizing an adaptive sync application
Classification: Plasma
Product: kwin
Version: 6.1.4
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: kdebugs.81do7@haxing.ninja
Target Milestone: ---
SUMMARY
Applications that put the monitor into adaptive sync mode when using
"Automatic" adaptive sync for a particular display can cause the monitor to be
unable to interpret the signal.
STEPS TO REPRODUCE
1. Open an application in full screen with adaptive sync on
2. Close the application
OBSERVED RESULT
The application sometimes causes the monitor to report that the signal coming
from the computer is unsupported.
EXPECTED RESULT
The monitor continues to receive a supported signal.
SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 40
KDE Plasma Version: 6.1.4
KDE Frameworks Version: 6.5.0
Qt Version: 6.7.2
Kernel Version: 6.10.4-200.fc40.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 32 × AMD Ryzen 9 7950X 16-Core Processor
Memory: 61.9 GiB of RAM
Graphics Processor: AMD Radeon RX 7900 XTX
Manufacturer: ASUS
ADDITIONAL INFORMATION
I think what's happening here is that the application adjusts the refresh rate
to something like 93fps just before adaptive sync is switched off. Then kwin is
still trying to run at 93 fps (but without adaptive sync) and the monitor goes
"I don't know what to do with this."
I can (as a work around) fix this by changing the monitor refresh rate in
settings using my second monitor (e.g. set the refresh rate to 60 from 120;
it's then okay to change it back to 120, but changing it to a different value
is all that's required to get things to "sync back up" and for my monitor to
understand the input again).
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