https://bugs.freedesktop.org/show_bug.cgi?id=49262
--- Comment #2 from Alexandre Demers alexandre.f.demers@gmail.com 2012-04-29 08:22:14 PDT --- It could be the same bug as I reported a while ago Bug 43655. Could you try one of the two following options: - under grub.cfg, remove "set gfxpayload=$linux_gfx_mode" for the problematic boot entry. - under grub, when you boot, select a different entry. Usually, with Grub2 under Ubuntu, you'll find the same boot entry in your list at the bottom, but it doesn't use the "set gfxpay..."
Read bug 43655, it could give you a hint. If it does help, then you'll be welcome aboard. ;)