This works on my EEEPC, if you hack AppleIntelIntegratedFramebuffer executable.
I used HexEdit to open the file and changed address 0x5DEC from 0x55 to 0xC3.
Then use Kext Helper to load.
Works so far, survives sleep.
I've now attached the file below as feedback from the forum suggests this works for others as well.
On wake from sleep the screen is fully dimmed and FN+F4 needs to be pressed to bring the brightness up.