Re: API to turn off the display

From: Donn Miller (dmmiller_at_cvzoom.net)
Date: 01/31/04

  • Next message: Tom Jensen: "ad0: TIMEOUT" 
    Date: Sat, 31 Jan 2004 06:54:42 -0500
To: Taku YAMAMOTO <taku@cent.saitama-u.ac.jp>

    Taku YAMAMOTO wrote:

    > I wrote a driver that handles what John told.
    >
    > http://access.cent.saitama-u.ac.jp/~taku/freebsd/acpi_vid-20031013.tar.gz
    > MD5 (acpi_vid-20031013.tar.gz) = adbfa6931e505544fb784e00c7b974e7
    >
    > This driver uses ACPI video extension to control display switching and
    > backlight brightness. So working ACPI is a requisition for this driver.
    >
    > Whether it does or does not work depends heavily on how well the BIOS written,
    > however, I hope it worth trying.
    >
    > Suggestions, working/not-working reports etc are very appreciated.

    I tried it.

    kldstat
    Id Refs Address Size Name
      1 19 0xc0400000 3ac910 kernel
      2 1 0xc07ad000 5e60 vesa.ko
      3 1 0xc07b3000 cffc if_dc.ko
      4 2 0xc07c0000 1a9c8 miibus.ko
      5 1 0xc07db000 9380 snd_maestro3.ko
      6 2 0xc07e5000 1f5c8 snd_pcm.ko
      7 2 0xc0805000 50f60 acpi.ko
      8 1 0xc2cc7000 b000 ntfs.ko
      9 1 0xc2d4b000 2000 apm_saver.ko
    10 1 0xc2f55000 19000 linux.ko
    11 1 0xc3133000 4000 acpi_vid.ko

    sysctl hw.acpi.video
    sysctl: unknown oid 'hw.acpi.video'

    It doesn't detect the video at all on my laptop, i.e., I get no output
    from dmest or the kernel that anything was detected.

    dmesg | grep -i vesa
    Preloaded elf module "/boot/kernel/vesa.ko" at 0xc08571f4.
    VESA: v2.0, 8192k memory, flags:0x0, mode table:0xc07b1ce2 (1000022)
    VESA: S3 Incorporated. M7 BIOS

    The laptop is an HP Pavilion N5440.

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