It looks like the upgrade hasn't worked. For example you still have old Mesa packages installed.
First please fully update your system: sudo apt update sudo apt full-upgrade and then reboot. If the problem still persists then please take a photo of the problem and attach the photo here. ** Package changed: xorg (Ubuntu) => ubuntu ** Changed in: ubuntu Status: New => Incomplete ** Summary changed: - Xorg freeze + Pixelation of the top bar and sometimes the desktop icons are also shown pixelated -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1875321 Title: Pixelation of the top bar and sometimes the desktop icons are also shown pixelated To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1875321/+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