hybrid-graphics-linux team mailing list archive

[Tais Plougmann Hansen <taisph@xxxxxx>]

True, this was while X was running. Without X I get "client 1 refused
switch". :)

Even though I have no experience with DSDT, I've been trying to read
thedisassembly anyway and this is what I've come up with for the ThinkPad
W520 with Nvidia Quadro 2000M:

_DSM
{0xF8,0xD8,0x86,0xA4,0xDA,0x0B,0x1B,0x47,0xA7,0x2B,0x60,0x42,0xA6,0xB5,0xBE,0xE0}
0x100 0x1A {0x0,0x0,0x0,0x0}

First argument seems to be a buffer compare with the 16 specified bytes.
Second argument has to be 0x100 or what looks like an error code will be
returned.
The third argument seems to be either 0x00, 0x10, 0x1A or 0x1B.
I can't figure out the fourth one.

I don't know if I need to call any other methods before/after this.

On Sun, May 15, 2011 at 01:38, Alex Williamson
<alex.l.williamson@xxxxxxxxx>wrote:

> On Sat, May 14, 2011 at 4:45 PM, Tais Plougmann Hansen <taisph@xxxxxx>
> wrote:
> > I've been playing with the switcheroo and it seems like no matter what I
> do
> > I get the following message in the log (after updating switchto_dis and
> > issuing echo "DIS" > switch):
> > vga_switcheroo: client 0 refused switch
> > I've tried a ton of combinations now with the same result.
>
> I've only seen this when X is running.  X can't be running.  It's not
> sufficient to merely switch to a vt text terminal.  X must be stopped
> entirely to release the graphics card to be able to switch.  You can
> use DDIS to post a switch for when X restarts, but I've found this
> isn't always as reliable. Thanks,
>
> Alex
>



-- 
Regards,
Tais Plougmann Hansen

OSD Consulting ApS
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