Comment 260 for bug 752542

Inspecting the acpi tables for this laptop, it seems there is an
ON/OFF method to switch the discrete card and save battery

echo '\_SB.PCI0.PEG0.VID._OFF' > /proc/acpi/call

There are also _PS0 and _PS3 calls to make sure the
suspend/hibernation works well:

        Method (_PS0, 0, NotSerialized)
        {
     If (DGOS)
            {
              _ON ()
                Store (Zero, DGOS)
                Store (Zero, MLTF)
     }
        }

        Method (_PS3, 0, NotSerialized)
 {
            If (LEqual (\_SB.PCI0.PEG0.VID.OMPR, 0x03))
            {
                _OFF ()
                Store (One, DGOS)
                Store (0x02, \_SB.PCI0.PEG0.VID.OMPR)
            }
 }

On Wed, Aug 31, 2011 at 10:07 AM, furst last <email address hidden> wrote:
> same sad story as most here,
> company bought me a dell precision M4600.
> 16GB Memory, Total of 8 processors activated (35120.04 BogoMIPS)
> Fixed the non-found eth0 & wlan0 by upgrading the kernel using an older USB WLAN stick I had lying around.
> Tried several ubuntu/kubuntu/debian-testing versions to no avail.
> They all crapped out on the Video stuff. 10.04 worked off the LiveCD but degraded at first boot.
> Runs at the moment with no nvidia drivers, but no external monitor either, so I have a nice 24" black light-sink sitting on my desk for my windows-using colleagues to laugh at. If I ever find the guy that engineered this stuff at nvidia I'd offer to give it back. In fact I'd even ask *how* he'd like it inserted, longways or sideways.
> Keep up the good work.
> //rhi
>
> ** Attachment added: "PrecisionM4600.01.tar.gz"
>   https://bugs.launchpad.net/lpbugreporter/+bug/752542/+attachment/2336083/+files/PrecisionM4600.01.tar.gz
>
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> report.
> https://bugs.launchpad.net/bugs/752542
>
> Title:
>  ACPI DSDT info
>
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