I've got the same problem. The scrambled video is not during the grub menu, it starts when booting the system. I assume the vga settings used during boot confuses my monitor.
My system: CPU AMD K6+/550 MHz, Radeon 7000, 384 MB Ram, 17" LCD. I upgraded from 5.10 where this type of problem didn't show up. -- Video scrambled https://launchpad.net/bugs/46974 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
