[Bug 415023] Re: brightness is broken on MSI WIND U100

[Guido Berhoerster]

Once again, you do not need to press a key, if you adjust the brightness
in software the hardware emits a keypress.

The main issue is that brightness adjustments need to be either handled
in hardware or in software, i.e. by g-p-m, powerdevil etc, and that
right now it is handled by both. This is broken in 9.04 as well, using
the keys you effectively get only 4 brightness levels although it is
capable of 8, there is just no flickering, which seems to be caused by a
rounding bug when using kernel modesetting.

The solution as I see it is that either MSI updates their BIOS or g-p-m
and friends do not attempt to handle it. I don't know the equivalent of
setting laptop_panel.brightness_in_hardware to true in HAL when using
xrandr. I have asked on the gpm list but really don't have time to
investigate any more into this.

-- 
brightness is broken on MSI WIND U100
https://bugs.launchpad.net/bugs/415023
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