https://bugs.kde.org/show_bug.cgi?id=453386
Bug ID: 453386
Summary: Multi/hybrid GPU double copy
Product: kwin
Version: unspecified
Platform: Other
OS: Linux
Status: REPORTED
Severity: wishlist
Priority: NOR
Component: compositing
Assignee: kwin-bugs-n...@kde.org
Reporter: ctj9...@cardkurd.com
Target Milestone: ---
Using a hybrid GPU system will cause the compositor to run on a single GPU.
This is the integrated GPU by default. If the display is connected to the
discrete GPU, and the application is rendered on the discrete GPU, the graphics
data is first copied to the integrated GPU (where the compositor runs), then
copied back to the discrete GPU. This causes significant performance loss.
GNOME has the ability to set the discrete GPU as primary, so the compositor
runs on the discrete GPU. However, this causes it to crash every time the
monitor connected to the discrete GPU is plugged or unplugged.
Ideally, the compositor would run separately on each GPU.
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