Comment 33 for bug 146692

working fine on my Q45 with intel.
to get the brightness working you need to downgrade your bios to 09ST:
download the 08ST.iso (http://www.samsungpc.com/gb/support/q45/bios/08st.iso)
burn to disc
boot from disc, type 08ST.exe /s /x /c /nomodel_partcheck (make sure the bios is correct)
you can then upgrade to 09ST.

the brighness control works much better now, i can swtich the backlight on and off. the change brightness level works, but it is still a little bit buggy.