Same problem since 20.10 upgrade this morning :
** Attachment added: "journal.txt" https://bugs.launchpad.net/ubuntu/+source/gweled/+bug/1897712/+attachment/5425897/+files/journal.txt -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/1897712 Title: Ugly image output make game unusable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gweled/+bug/1897712/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs