Similar problem here - two high end notebooks with nVidia 9800M GT cards. Brightness hot keys don't work and possible brightness levels are not available on either system.
ls /proc/acpi/video/ --- directory is empty ls /sys/class/backlight/ --- directory is empty Brightness can be adjusted in the BIOS and Windows on one system and only in Windows on the second. Tested 8.04.1 with the latest kernel and Intrepid with 2.6.27-2 and 2.6.27-3. acpi will dim the display to sleep when inactive. With nvidia-settings color brightness can be adjusted but not the backlight. The brightness can not be adjusted in kpowersave either. It says the "Your hardware currently does not support changing the brightness on your display". This is the same as gnome brightness panel applet. I think it's due to the inability to read LCD brightness data from /proc and /sys interfaces. -- Laptop backlight adjustment problem https://bugs.launchpad.net/bugs/112054 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
