It already exists in focal-proposed. So you can enable 'proposed' updates or just download the new packages:
https://launchpad.net/ubuntu/+source/mutter/3.36.6-1ubuntu0.20.04.2/+build/19963778 -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-graphics-drivers-390 in Ubuntu. https://bugs.launchpad.net/bugs/1855757 Title: [nvidia] Background image corrupted after standby or resume from suspend To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1855757/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp