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. 
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.
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