https://bugs.kde.org/show_bug.cgi?id=378144
Bug ID: 378144
Summary: Hiding mouse cursor leads to black flash
Product: kwin
Version: git master
Platform: Other
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: platform-drm
Assignee: kwin-bugs-n...@kde.org
Reporter: subd...@gmail.com
Target Milestone: ---
Open Kate, move mouse cursor in text area. After short pause the cursor hides
(as intended), i.e. DrmOutput::hideCursor() is called. Bug: A quick black flash
appears from bottom till cursor position.
My guess is, that calling drmModeSetCursor(m_backend->fd(), m_crtc->id(), 0, 0,
0) in between presents is the cause.
We could:
* Try to synchronize it with present (difficult in legacy mode, possible in AMS
after we introduced a cursor plane instead of using drmModeSetCursor).
* For hideCursor() instead of removing the cursor via drmModeSetCursor(..) show
a transparent cursor image.
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