Lenovo Y570 backlight

[SicoSico]

Yes, I am using KMS.

#xbacklight 
No outputs have backlight property

#pciconf -lv
vgapci1 at pci0:0:2:0: "This is the intel graphics card address"

I tried some commands like the following, I think the syntax is right as
they don't print errors, yet no change in brightness still:
#pciconf -w pci0:0:2:0 f4.b 44,44
#pciconf -w pci0:0:2:0 44 44

I got that syntax from:
http://forums.freebsd.org/showthread.php?t=24492

Thanks very much Matt for your help, I hope you can find some time to take a
look at my DSDT.



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