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.
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.