Dell 7010 DVI-I stupidity

[jdreed]

The 7010s, when using DVI-I to VGA, display borked video (either a rapid black-and-white flashing of the screen, or the entire image compressed into a 5 rows of pixels at the top of the screen). This can be worked around by forcing the grub prompt to be displayed and forcing grub to 640x480. Yes, really.

I suspect this is a variant of the same stupid framebuffer issues we had with kexec'ing for the Natty upgrade (see r25347, r25349, r25351, r25353, r25357 and associated stupidity).

[jdreed]

Appending nomodeset also "fixes" this in that you get 4:3 stretched to 16:9, but at least you get a usable desktop. I cannot come up with a video= setting that works.

[jdreed]

(For maximum stupidity, this works if you force grub to display its menu, even for a few seconds, which presumably does some sort of framebuffer magic that I can't replicate with kms.)