Normally I would ask you to explain what the exact problem is. But in this case it seems you have the 'oibaf' PPA installed, which is not supported and is known to be buggy.
Please remove the oibaf PPA from your system and then open new bugs for any problems you still have. ** Changed in: xorg (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1875964 Title: Happened after apt upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1875964/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs