On Tue, 2021-11-23 at 09:48 +0100, Milan Crha wrote:
I'll give it a try, to see whether it'll help. I'll
report back when I
know more.
Hi,
I noticed I have installed an ancient kernel-5.11.17-300.fc34.x86_64,
thus I booted it, but it did not help.
I updated the
https://people.gnome.org/~mcrha/glitches.mp4 , it shows
how Firefox draws its menu when moving mouse above the items.
I realized I've disabled compositing manager in MATE (gsettings get
org.mate.Marco.general compositing-manager). When I enable it the
things get much better, the Firefox stops misbehaving in the menu.
I do not know why it had been disabled, the machine is updated from
Fedora to Fedora, for years. The compositing-manager has some side
effects I'm not used to (the way things are drawn in the desktop
environment), but I guess I can live with it.
One last question: is the hardware acceleration meant to work also
without the compositing-manager? I do not know whether GNOME Shell has
a way to disable it and whether it would work similarly odd there as
well, though maybe it would worth a try.
Anyway, consider this fixed. Thanks a lot for your help.
Bye,
Milan