I have the same problem with the last kernel (3.13.0-24), I can't adjust the brigthness. When I try to adjust the brigthness, I can see the animation on the screen but I doesn't change anything, the brigthness stay at low level. I must use the kernel 3.11.20 to adjust the brigthness.
I have the same problem with the last kernel (3.13.0-24), I can't adjust the brigthness. When I try to adjust the brigthness, I can see the animation on the screen but I doesn't change anything, the brigthness stay at low level. I must use the kernel 3.11.20 to adjust the brigthness.