I found out what the issue was. The problem is the new linux kernal update Linux 5.8.0-50-generic.
After booting up with Linux 5.8.0-48-generic (the previous one), the problem is resolved -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1926840 Title: Display/Graphics bug To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1926840/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
