Comment 10 for bug 36550

Looking at the webpage, it looks like you're loading '915resolution' to reprogram to a widescreen mode.

The program here is that we blindly overright the 'width' and 'height' fields in the Video BIOS table but don't make any effort to setup the analogue mode-lines to match.

There is some code in the i810 CVS HEAD that adds the 915resolution patching ability and further still (only since last night) some code in some Intel that provides native mode-setting and avoids the BIOS completely. These will fix the problem both ways but whether it's safe to backport them is another question.

BTW, Dapper should not need anything like:

  noapic nolapic pci=noacpi” (or “noapic acpi=on irqpoll pci biosirq”)

to boot. Could you try removing as many of those parameters as possible and test again (mostly likely, if you need any of them it would be just the 'nolapic'). They also don't quite make sense (eg. 'noacpi' and then 'acpi=on').