on dapper it definitely happened, and I think on edgy as well, only less often. and I do not recall it happening in a while, as I am on feisty now so it may have been solved.
-- [x600] wavy effect after VT switch https://launchpad.net/bugs/22749 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
