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Re: Bumblebee for Hybrid SLI (Nvidia MCP79 / 9400M G / 9200M GS) on Dell Studio XPS 13 (1340)


Thanks for the ideas, Peter. I've attached a gzip of my acpidump, if you
have a chance to look at it.

I'm also working on extracting the methods. Do you have any suggestions
about how to work out what a particular method does?


On Wed, Sep 5, 2012 at 1:40 PM, Lekensteyn <lekensteyn@xxxxxxxxx> wrote:

> Hi Michael,
> On Wednesday 05 September 2012 13:26:06 Michael Rodríguez-Torrent wrote:
> > "STA" reports a status (whether the device is on or off).
> >
> > The method I'm looking at is actually "HSTA," which I can't find anywhere
> > in the ACPI spec. There is a separate "_STA" method, which I believe is
> the
> > one you're thinking of. HSTA just does a simple check and returns 1 or 0,
> > however, so I suppose it is still some sort of status method. Would
> > thinking that it could stand for "hybrid status" be too much of a leap?
> Only names starting with a _ are reserved in ACPI. HSTA is not a standard
> one,
> but from the many tables I have seen so far it is an internally used
> method.
> There is likely a _DSM or _STA method that calls this method (grep for it).
> I have some tools on https://github.com/Lekensteyn/acpi-stuff that might
> help
> you reading your DSDT/SSDT information. In particular, view.html for
> collapsing/expanding nodes and get_methods for retrieving a list of
> methods in
> your DSDT/SSDT.
> get_method requires acpiexec which not shipped with Ubuntu. Download and
> build
> it from https://www.acpica.org/downloads/. Assuming that you have then
> put it
> somewhere in your $PATH, you should do something like:
> $ sudo acpidump > acpidump.txt
> $ acpixtract acpidump.txt   # creates .dat files
> $ ./get_methods *.dat > methods.txt
> If you attach the acpidump.txt to your mail, I may look at it.
> >> Maybe https://wiki.archlinux.org/index.php/Dell_Studio_XPS_13
> >
> > I have seen this, and it is one of the places that gave me the idea to
> try
> > setting the BusID. But, as I said, that did not work. I don't see
> anything
> > else on that page that is of use in addition to what I've tried -- was
> > there something that you noticed?
> I do not think that setting the BusID is magically going to change the
> display
> output, there must be some other trigger.
> > It seems like I need to find some way of making the dedicated GPU connect
> > to the LCD. Does anyone have any ideas? Maybe there's an ACPI method that
> > controls this connection? I'm not sure how to identify it if there is.
> Have a look at _DSM or MX** methods under your graphics ACPI handle.
> Regards,
> Peter

Attachment: dell-studio-xps-1340_acpidump.txt.gz
Description: GNU Zip compressed data