Now it looks better. grub is still messed-up, but as soon as the kernel is loaded, everything is straight and square. I still use 2.6.15-19 as a kernel. I don't know what package was responsible of the problem.
-- text console garbled from boot up https://launchpad.net/bugs/63970 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs