Thanks. Would I be correct in suspecting you're using an Nvidia graphics chip?
Regardless, please run this command on the machine and paste the output here: lspci -k -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1706807 Title: scrambling/pixelation and jutter upon opening thunderbird To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1706807/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
