GNOME Bugzilla – Bug 789929
Compositing in 4k is not smooth
Last modified: 2021-07-05 13:46:39 UTC
I am using Gnome-Shell 3.26 (X11) on a 4k screen, and running Firefox 57 beta. When I run this browser in full-screen (which, if I understand correctly, means that Firefox gets unredirected), scrolling on websites is as nice and smooth as I know it from full HD screens. However, in windowed mode, scrolling has noticeably higher latency and doesn't seem to reach 60fps any more. Looks like mutter cannot keep up when rendering on 4k. This makes surfing the web less smooth (and fun) than it would otherwise be. My GPU: 00:02.0 VGA compatible controller: Intel Corporation HD Graphics P530 (rev 06) My kernel: 4.13.0-1-amd64 #1 SMP Debian 4.13.4-2 (2017-10-15) x86_64 I am on Debian testing; some relevant software versions: xserver-xorg-core: Installed: 2:1.19.5-1 libgl1-mesa-dri: Installed: 17.2.3-1 libdrm2: Installed: 2.4.85-1
This does not just affect Firefox, the entire system feels not very responsive when on 4K. I have switched to using full HD resolution on my 4K screen yesterday, and the difference is remarkable -- the entire system is immediately much smoother.
GNOME is going to shut down bugzilla.gnome.org in favor of gitlab.gnome.org. As part of that, we are mass-closing older open tickets in bugzilla.gnome.org which have not seen updates for a longer time (resources are unfortunately quite limited so not every ticket can get handled). If you can still reproduce the situation described in this ticket in a recent and supported software version, then please follow https://wiki.gnome.org/GettingInTouch/BugReportingGuidelines and create a new ticket at https://gitlab.gnome.org/GNOME/mutter/-/issues/ Thank you for your understanding and your help.