https://bugs.kde.org/show_bug.cgi?id=511592
Bug ID: 511592
Summary: Maximizing a window on a monitor briefly flashes the
window on secondary monitor to the right
Classification: Plasma
Product: kwin
Version First 6.5.0
Reported In:
Platform: CachyOS
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: core
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
When maximizing a window on a left side monitor, having another monitor to the
right, the window will occasionally briefly flash on the second monitor.
This is especially apparent when the monitor on which you are maximizing the
window is scaled up, and the right side monitor isn't. The maximized window is
very big, in pixel size, on the scaled monitor, and therefore takes up a good
bit of the second monitor's screen during the flash.
I have 3 monitors, left to right scaling : 150 %, 150 %, 100 %, and the issue
happens as well when maximizing a window on my left most monitor. The flashing
appears on my middle monitor, which is also scaled at 150 %.
The bug doesn't happen 100 % of the time, and I don't know the exact trigger to
make it happen 100 % of the time. It seems random.
STEPS TO REPRODUCE
1. Have two monitors.
2. Open firefox in a window that is not maximized, on the left most monitor.
3. Maximize the window.
Important note : I have all relevant desktop effects disabled, and my global
animation speed is instant.
OBSERVED RESULT
You should see, at some point, a flashing of the window on the right monitor.
If not, try moving the window around, and try again. It should happen at some
point.
There is also a frame for which the window is at its windowed size, in the top
left corner of the left monitor, before being maximized.
EXPECTED RESULT
The window should maximize without flashing on secondary monitors.
SOFTWARE/OS VERSIONS
Operating System: CachyOS Linux
KDE Plasma Version: 6.5.1
KDE Frameworks Version: 6.19.0
Qt Version: 6.10.0
ADDITIONAL INFORMATION
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