Hi I use Opensuse 12.2 (with Gnome 3.4.2, kernel: 3.4.6-2.10-desktop) installed on a HP Compaq 6910p notebook PC (ATI x2300 graphic card) and I have problem with the brightness of the screen: it is possible to control the brightness with fn+F9 and fn+F10, but the maximum brightness is much lower then what is possible to achieve under Windows XP.
I tried to add kernel options acpi_osi=Linux and also acpi_backlight=vendor to grub, but no change. Can anybody help? thanks in advance.