Comment 36 for bug 1229591

No change I'm afraid.

I might be misunderstanding what those options do, but the problem isn't the backlight itself. As I stated in the original bug report, changing the value in /sys/class/backlight/intel_backlight/brightness does dim the screen (as does the slider in system settings / brightness & lock). The problem is that the brightness function keys (Fn+F4 and Fn+F5) stopped working after upgrading to Saucy.

Somehow, what appears to be a keyboard issue seems to have morphed into hunting for a backlight-related problem (unless the two are more intertwined than I think)