Re: Two Nvidia cards, and black screen

[<ce...@ri...>]

han...@sa... a =E9crit :
> Right now there is one thing that really disturbs me, and that is the=20
> fact that after 6 hours of playing around with the X servers today, I=20
> once got both displays up and running perfectly, but just once. The next=
=20
> time I tried it with exactly the same settings, once again it didn't work.
>=20
> Another thing that I have noticed is that I can change back and forth=20
> between both running xservers by using either "xset -dpms -display :0.0"=
=20
> or "xset -dpms -display :1.0". This will wake up the monitor of one X=20
> server, while putting to sleep the other ones monitor and vice/versa.
>=20
> I'm not giving up yet though ;) I must have missed something.. I have=20
> also been trying with the opensouce "nv" driver, but get the same results.

After reading vgahw, radeon and nv source code, it seems to me that both
problems (blanc screen and DPMS) are related to vgahw functions call.

I'm afraid there's no solution with the stock drivers because I presume
there is a ressource conflict on VGA IOs between the two cards.

I would suggest to use a modified nv driver for the secondary card to
prevent messing the primary card settings. I guess the function=20
NVRestore should be disabled to prevent the blank the screen at shutdown.=20
As for DPMS, I didn't look at it yet.

C=E9dric