Comment 17 for bug 297962

I can confirm the same situation on Samsung Q320 with nVidia GeForce 105M (Korean version, Q320-BS21, there is only 01LH firmware at the moment) and 64bit Jaunty.

The keys for backlight/brightness have the same codes as R510, there is one more for DVD/CD reject (e03a), both plugging and unplugging of external power shows the "thermometer" of expected backlight level, but no change provided. Backlight keys (all three) have no effect except notes in kern.log described above.