Rather bizarrely, I can't get it to work with any of the mainline kernels. Even going back to 3.9.11-030911-generic which should work (since the real 3.10.0-6 works fine) I get no brightness control.
I've also noticed the screen never seems to get turned off. After a while it will blank the screen, but the backlight is still on. This may be completely unconnected, but thought I'd mention it here just in case it may be relevant.
Rather bizarrely, I can't get it to work with any of the mainline kernels. Even going back to 3.9.11- 030911- generic which should work (since the real 3.10.0-6 works fine) I get no brightness control.
I've also noticed the screen never seems to get turned off. After a while it will blank the screen, but the backlight is still on. This may be completely unconnected, but thought I'd mention it here just in case it may be relevant.