Upgrading from 177.80-0ubuntu2 to 177.80-0ubuntu3 did not solve the bug. I noticed that it occurs more frequently with dark themes, for eg. Newave from community-themes package.
-- [nvidia 169.xx] gtk window decorator somtimes draws decoration ugly or not at all https://bugs.launchpad.net/bugs/186382 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs