Ok, I have found temporary solution. In grub i have the following line:
... linux /boot/vmlinuz-2.6.38-9-generic-pae root=UUID=b0da63e6-8a8d-4671-bb75-cd25c00f6585 ro vga=792 quiet splash nomodeset video=uvesafb:mode_option=1440x900-24,mtrr=3,scroll=ywrap vt.handoff=7 .... If I change it to: linux /boot/vmlinuz-2.6.38-9-generic-pae root=UUID=b0da63e6-8a8d-4671-bb75-cd25c00f6585 ro vga=792 the brightness control works. One boot ago I reinstalled nvidia-current. I will try to reboot and check if it still works. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/773710 Title: [Lenovo T420s] Brightness keys make the indicator work, but don't actually dim or brighten the screen -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
