https://bugs.kde.org/show_bug.cgi?id=442240
Bug ID: 442240
Summary: On wayland certain screen configurations severely
limit frame rate to the point of being unusable
Product: kwin
Version: git master
Platform: Neon Packages
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: platform-drm
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
On kwin_wayland master, certain screen configurations makes performance (fps)
plummet. When my Intel based laptop is using dumb buffers on the Nvidia driven
external output(s), certain configs work at 30-60 fps whilst others at 5-15 fps
- rendering it virtually unusable.
When the Intel screen is placed to the left or to the top in a two monitor
config, performance is good. When the laptop screen is placed to the right, to
the bottom or cloned, performance hits a brick wall.. The fps kwin effect
places itself on the external screen in these instances.
Performance used to be decent in any configuration but has definitely worsened
with the heavy refactoring of late.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: KDE Neon Unstable
(available in About System)
KDE Plasma Version: 5.22.80
KDE Frameworks Version: 5.86.0
Qt Version: 5.15.3
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