Re: acpi_video on SONY VAIO PCG-Z1 [was: acpi_video users needed]

From: Vladimir Grebenschikov (vova_at_fbsd.ru)
Date: 08/31/04

  • Next message: takawata_at_jp.freebsd.org: "Re: acpi_video on SONY VAIO PCG-Z1 [was: acpi_video users needed]" 
    To: current@freebsd.org
Date: Tue, 31 Aug 2004 14:39:22 +0400

    On Tue, 2004-08-31 at 14:02 +0900, takawata@jp.freebsd.org wrote:
    > In message <1093891970.1195.25.camel@localhost>, Vladimir Grebenschikov wrote:
    > >On Tue, 2004-08-31 at 03:31 +0900, takawata@jp.freebsd.org wrote:
    > >
    > >> >> >Is any chance to make acpi_video work on SONY VAIO PCG-Z1 ?
    > >> >> >acpi_video.ko loads well, but does not report anything, and does not add
    > >> >> >hw.acpi.video subtree.
    > >> >> >
    > >> >> >Please advise.
    > >> >>
    > >> >> Because the ACPI device object has not enough interfaces to get the
    > >> >> acpi_video driver work.
    > >> >> Acpi_video driver does not check PCI device class: it checks the
    > >> >> interfaces instead.
    > >> >> You don't need to bother attaching acpi_video driver.
    > >> >
    > >> >Ok, And what conclusion "no-way" ?
    > >>
    > >> You may hack the driver to do so.:-)
    > >
    > >Oh ... first i need to hack WinXP driver to find how to control LCD
    > >brightniness.
    > >
    > >> But, in your machine, the driver does not work anything but
    > >> recognize that the video adaptor has 3 way output. And
    > >> you can't use acpi_video, if you want to use DRM or nvidia kernel module.
    > >
    > >I have ATI RADEON MOBILITY, so no need nvidia module.
    > >
    > >Can you provide me a bit of theory ?
    > >
    > >Who usual responsible for LCD bacllight control ?
    > > video-chip(ATI) / chipset(Intel) / special device on bus ?
    >
    > It seems to be controlled by Special device on bus called embedded controller.
    > You can use it with setbrightness in ports/sysutils/sjog or
    > ports/graphics/picturebook. But these tools are a bit dangerous because
    > it will conflict with ACPI(These tools are based on disassembled AML before
    > ACPI support is not populler in free unicies.)
    > .
    > I just wrote a driver for it. I hope it will help you.
    > http://www.init-main.com/acpi_snc.tar.gz

    Yes, it works, now I can control LCD backlight brightness.
    $ setbrightness 50
    $ setbrightness 255
    # sysctl dev.acpi_snc
    dev.acpi_snc.0.%desc: Sony system controller
    dev.acpi_snc.0.%driver: acpi_snc
    dev.acpi_snc.0.%location: handle=\_SB_.PCI0.LPCB.SNC_
    dev.acpi_snc.0.%pnpinfo: _HID=SNY5001 _UID=0
    dev.acpi_snc.0.%parent: acpi0
    dev.acpi_snc.0.brightness: 60
    #

    Now only issue I am warry about "How to awake screen after suspend ?" 

    -- 
Vladimir B. Grebenschikov
SWsoft Inc. vova@sw-soft.com
-- 
Vladimir B. Grebenchikov
vova@fbsd.ru
_______________________________________________
freebsd-current@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-current
To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"
  • Next message: takawata_at_jp.freebsd.org: "Re: acpi_video on SONY VAIO PCG-Z1 [was: acpi_video users needed]"