Comment 14 for bug 773471

I just found out myself that the patched kernel comes with a nasty drawback. My backlight comes up fine and I can control the brightness just fine until I close the lid. After reopening it stays black no matter what I do, including setpci.

Your symptoms sound different, however. How long does it work with the patched kernel? Till the first mouse move? Do the backlight hotkeys work till then? When it goes black can you bring it back on with setpci?
output from "uname -a" and "ls /sys/class/backlight"?
Does the command: xset dpms force off
switch it off and does it come back on when you press a key or at least with setpci?
What happens after you close the lid?

I am hoping that by providing enough details the author of the patch will be able to fix this.