Guys, the best thing i could manage until now was install the ¨experimental¨ drivers for nvidia.
When I open the ¨additional drivers¨, he gives me two options, the proprietary and the open source. Using the proprietary, I can´t control the backlight (stays at 100%), but i can use unity. By the way, in this situation, the ¨additional drivers¨ dialog says the nvidia driver is installed but not ¨currently in use¨, just like bro described. Using the open source ¨experimental¨ alternative, the backlight control works the same way than worked with no special driver installed at all. In that situation, I can´t use unity, but I can control brightness. One thing worth saying is that even when I can control the backlight (with nvidia open source, or with no special driver), this control is strange. I only have four degrees of light and I can vary among them with the four lower degrees of the graphic indicator. All the higher levels are useless. I´m using the nVidia Corporation GT218 [GeForce 310M] (rev a2) on a Sony Vaio VPCCW21FX. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/764195 Title: laptop screen blacklight brightness always at 100% (even on battery), can't be lowered To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers/+bug/764195/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
