I removed the splash line from grub's kernel command and the issue reported no longer appears, it seems this is related to usplash ?
-- Kubuntu 8.10 fails to shutdown properly - displays coloured vertical lines https://bugs.launchpad.net/bugs/301628 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
