Lenovo Y570 backlight

[matt]

On 09/03/12 19:31, SicoSico wrote:
> Thanks for your reply Kevin Oberman,
>
> #acpi_call -p '\VBRC' -i 5
> Unknown object type '-1515870811'
>
> Here are some values that may be related:
>
> #acpi_call -p '\_SB.PCI0.LPCB.EC0.BRTS'
> 10
> #acpi_call -p '\_SB.PCI0.GFX0.DD02._BCM'
> 0
> #acpi_call -p '\_SB.PCI0.GFX0.DD02._BQC'
> 0
> #acpi_call -p '\_SB.PCI0.GFX0.DD02.LVLS'
> 10
> #acpi_call -p '\_SB.PCI0.GFX0.DD02._BCL'
> Unknown object type '4'
> #acpi_call -p '\_SB.PCI0.PEG0.VGA.LCD.PLVL'
> Unknown object type '4'
>
> \_SB.PCI0.GFX0.DD02._BCM can be changed:
> #acpi_call -p '\_SB.PCI0.GFX0.DD02._BCM' -i 4
> 4
>
> After that \_SB.PCI0.GFX0.DD02._BQC value is changed to 1:
> #acpi_call -p '\_SB.PCI0.GFX0.DD02._BQC'
> 1
>
> But still this has no effect to the brightness.
> DSDT files were attached in an earlier post.
>
>
>
> --
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Have you already tried kldload acpi_video and using the sysctl interface?
It looks for _BQC to attach, so it's worth a try.

Matt