I made the jump to Squeeze on this laptop with a minimum of problems. In fact, the only real issue of note was the shift to Grub2, which always confounds me.
So I can figure this out with less effort in the future, Grub2′s configurations in Debian are at /etc/default/grub. Adjusting this line to read
and adding this line
gave me proper screen dimensions all the way through the boot process. Instead of snapping back at the end. Why would that be necessary? I can only wonder.
Actually enforcing those options will require
grub-mkconfig -o /boot/grub/grub.cfg
Until then, Grub just flaps its lips at you. But once that’s done, it works fine.
Surprising credit line of the day: Thanks to the Arch wiki, which had the information up front and easy to find. Cheers.