https://bugs.kde.org/show_bug.cgi?id=361091
Bug ID: 361091
Summary: Translucency lost when starting video using mpv
bypassing the compositor
Product: kwin
Version: 5.6.0
Platform: Exherbo Packages
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: effects-various
Assignee: kwin-bugs-n...@kde.org
Reporter: li...@bernd-steinhauser.de
Tried with OpenGL 2.0 and 3.1, XRender, EGL, GLX, all the same.
Transparancy comes back when mpv exits or when the compositor is restarted or
the backand is changed.
It seems like it only happens when x11-bypass-compositor is enabled, which is
explained as:
"If set to yes (default), then ask the compositor to unredirect the mpv window.
This uses the _NET_WM_BYPASS_COMPOSITOR hint."
Thus, I've not seen it with other players like vlc, firefox html5 video or
ffplay, which don't seem to make use of that hint.
It could also be a bug in mpv.
Reproducible: Always
Steps to Reproduce:
1. Enable the Translucency effect, ensure it works
2. Start a movie using mpv. Video output does not matter (tested xv, x11, vdpau
and opengl)
3. Check if Translucency works
4. Quit mpv
5. Check if Translucency works
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