1777393 - [KDE] When playing fullscreen video in Wayland mode, desktop notifications cause flickering

Status: RESOLVED INVALID

(Core :: Widget: Gtk, defect, P3)

Description

[Shmerl]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:103.0) Gecko/20100101 Firefox/103.0

Steps to reproduce:

When playing a video in fullscreen and some Plasma desktop notification happens (let's say even from Firefox itself through plasma-browser-integration), video flickers.

This only happens in the Wayland Plasma session. In X11 one there is no such flickering.

KDE Plasma: 5.25.1

Comment 1

[Shmerl]

Btw, not sure why user agent is reported as Mozilla/5.0 (X11; Linux x86_64; rv:103.0) Gecko/20100101 Firefox/103.0, I'm indeed running it in Wayland mode even according to about:support.

Comment 2

[Martin Stránský [:stransky] (ni? me)]

Can you try Gnome for instance? This may be KDE specific.

Comment 3

[Shmerl]

I don't have Gnome installed, but KDE developers suggested it's a Firefox bug. I can direct them here may be.

Comment 4

[Martin Stránský [:stransky] (ni? me)]

Can you create a screencast of the issue then?
https://fedoraproject.org/wiki/How_to_debug_Firefox_problems#Collect_information_for_a_bug_report
Thanks.

Comment 5

[Shmerl]

KDE developers suggested it could be a Kwin bug after all:

sometimes there's a wrong frame in mvp as well when direct scanout is interrupted

So I'll close it for now unless something else will come up.

Comment 6

[Shmerl]

Attachment: glitch.mkv

Just for the record, attaching the screen capture of the glitch.

You can convert it to individual frames like this:

ffmpeg -i glitch.mkv frame%4d.png

The glitch will be in frame frame0205.png. It happens if desktop notification is triggered