If I have Firefox windows spread across multiple workspaces, it causes extreme graphical lag and slowness. Moving them to the same workspace instantly fixes the issue. Does anyone know why this would be the case?
I have a dual screen monitor, an i7-4770 with 16GB RAM and GeForce GTX 750 Ti [nouveau drivers], and Ubuntu 20.04.2 LTS (5.4.0-73-generic), and the Unity Desktop.
This issue does not occur on other Ubuntu systems (again with the Unity desktop) I own.
Edit: Requested screenfetch output:
./+o+- username@PC_NAME yyyyy- -yyyyyy+ OS: Ubuntu 20.04 focal ://+//////-yyyyyyo Kernel: x86_64 Linux 5.4.0-88-generic .++ .:/++++++/-.+sss/` Uptime: 22h 20m .:++o: /++++++++/:--:/- Packages: 2941 o:+o+:++.`...-/oo+++++/ Shell: bash 5.0.17 .:+o:+o/. `+sssoo+/ Resolution: 3840x1080 .++/+:+oo+o:` /sssooo. DE: Unity 7.5.0 /+++//+:`oo+o /::--:. WM: Compiz \+/+o+++`o++o ++////. WM Theme: Arc-Dark .++.o+++oo+:` /dddhhh. GTK Theme: Yaru-dark [GTK2/3] .+.o+oo:. `oddhhhh+ Icon Theme: ubuntu-mono-dark \+.++o+o``-`.:ohdhhhhh+ Font: Ubuntu 12 `:o+++ `ohhhhhhhhyo++os: Disk: 1.2T / 2.0T (63%) .o:`.syhhhhhhh/.oo++o` CPU: Intel Core i7-4770 @ 8x 3.9GHz [37.0°C] /osyyyyyyo++ooo+++/ GPU: NV117 `` +oo+++o\: RAM: 4749MiB / 15855MiB `oo++. 1 Answer
I found an answer after having tested multiple changes in about:config I hope I narrowed it down correctly:
Open a new tab and go to about:config, search for gfx.webrender.software and set it to true.
You may need to restart your Firefox/computer for it to take effect.
