Graphics artifacts started appearing in many web browsers following a recent update. I run KDE through ubuntu 20.04 and am up-to-date as of 8-31-2020. My graphics card is Radeon RX 580. I have tried the non-proprietary drivers and the AMD supplied drivers, the problem shows up the same with either set of drivers. The problem occurs with all browsers I have tried (Firefox, Brave, Chrome, and Chromium). It seems to be related to layers. The artifacts are blocks that appear in the lower left triangle of the screen and flicker whenever I type, move the mouse, and even flicker in time with the blinking cursor. See two attached screen shots for samples.
Workaround available for Chromium browser mentioned on Chromium bugs site.
--use-gl=desktop bypasses the problem.
I have encountered the same problem with a quadro p1000. I'm starting to think that there was something bad in the 20.04 upgrade.
nvidia-settings. I'm not sure if there is a similar settings tool for Radeon. (maybe
Then, I set the OpenGL Image settings to
Save to X Configuration file (which auto merges with
/etc/X11/xorg.conf). Did a reboot for the changes.
So far I haven't observed any issues in the past 3 days.