Hi, I'm currently having this bug, my guess is that it is related to a mutter issue (https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1809407) I'm supposed to patch somehow, do you have any advice on what I should do ?
Fix background texture corruption when resuming from suspend on Nvidia
I also have this issue
Sometimes it's the background that is corrupted, and sometimes it's my webbrowser.
- Edited
Its been reported before: https://dev.getsol.us/T7982 Gnome devs are working on it, https://gitlab.gnome.org/GNOME/mutter/merge_requests/600
The only work around is don't use suspend or change the wallpaper after resuming from suspend (every time) to have a normal wallpaper again.