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Date:      Mon, 03 Sep 2012 22:47:52 -0700
From:      matt <sendtomatt@gmail.com>
To:        SicoSico <resuscitated_wael@hotmail.com>
Cc:        freebsd-x11@freebsd.org
Subject:   Re: Lenovo Y570 backlight
Message-ID:  <50459608.7050801@gmail.com>
In-Reply-To: <1346725868219-5740516.post@n5.nabble.com>
References:  <1342085203648-5726207.post@n5.nabble.com> <201207121653.32046.erichfreebsdlist@ovitrap.com> <1342094808885-5726236.post@n5.nabble.com> <50004AF0.1010400@gmail.com> <1346704065209-5740445.post@n5.nabble.com> <CAN6yY1tJggN1%2BCS37DBqRPO=mynwEnNM0xs8K-dhQVLma9RzLQ@mail.gmail.com> <1346725868219-5740516.post@n5.nabble.com>

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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.
>
>
>
> --
> View this message in context: http://freebsd.1045724.n5.nabble.com/Lenovo-Y570-backlight-tp5726207p5740516.html
> Sent from the freebsd-x11 mailing list archive at Nabble.com.
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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



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