hybrid-graphics-linux team mailing list archive

[Alex Williamson <alex.l.williamson@xxxxxxxxx>]

FYI, I just pushed out some changes for this that seem to make using
the discrete graphics with the nouveau driver feel pretty stable.
Give it a try and let me know what you find.  Thanks,

Alex

On Sun, Apr 17, 2011 at 8:54 PM, Alex Williamson
<alex.l.williamson@xxxxxxxxx> wrote:
> I've been poking around at getting switcheroo working on my Asus
> UL30VT and decided to drop it into a stand alone kernel module so that
> it's portable among various distributions and usable with existing
> kernels.  This is really pretty generic, so I expect eventually we can
> incorporate it into nouveau_acpi.  You can find the source tree here:
>
> git://github.com/awilliam/asus-switcheroo.git
>
> If all you want to do is switch the discrete graphics off to save
> battery, it does that perfectly (note the included suspend/resume
> script).  It's also able to switch the discrete graphics on with
> nouveau.  This still has several issues (mostly with the remaining
> Intel driver).  See the README for details.  Also, if you're dead set
> on using the proprietary nvidia driver, there's a hack included for
> that... see the README.  So far this is only tested on x86_64 Fedora
> 14.  Standard disclaimers apply, this works for me, but use at your
> own risk.
>
> The theory of using a separate switcheroo module is simply that the
> switcheroo code only accepts one "handler", first come, first served.
> So, all we need to do is register before nouveau and take that slot.
> I really don't know what some of these MX ACPI method calls do (if
> anyone can share the MXM spec, please do), but I spent a while looking
> at the DSDT and poking things with acpi_call to figure out what works.
>  When enabling the dummy client support for nvidia, we switch over the
> mux and power up the device, leaving it enabled and unclaimed by
> drivers for the nvidia driver to take over.  Good luck, patches
> welcome.  Please report if it works on other Asus laptops.  Thanks,
>
> Alex
>