Debian on ~2012 Asus EeePC 1025C

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Video.

needs the gma500 video driver module in the kernel. this exists in kernel 3.3.0+. Compile a kernel with gma500 enabled and boot into that. X then just works. (note: the gma500_gfx module appears to have been added to 3.2 mainstream kernel now as of sept 2013)

voodoo: add kernel commandline param
console=tty1

screen brightness

update grub to add the kernel commandline params:
acpi_osi=Linux

Suspend/resume

The video device needs to be POSTed after resume from suspend and then have its saved VBE state restored. create a file called /etc/pm/config.d/gma500 containing:

ADD_PARAMETERS='--quirk-vbe-post --quirk-vbestate-restore'

This makes pm-suspend do those things so that video comes back correctly.