Re: Using quad or dual cards

[Matrix <ma...@le...>]

Do you have a solution dual-head (displays independent) with a Radeon
9200SE?  I am searching a solution with this video card already some time
and i only obtained to use the Xinerama.

Bringel
----- Original Message ----- 
From: "Helge Hafting" <hel...@hi...>
To: "oregon" <or...@po...>
Cc: <lin...@li...>
Sent: Friday, December 10, 2004 8:28 AM
Subject: Re: Using quad or dual cards


> oregon wrote:
>
> >Has anyone had any success getting multiple separate instances of X to
> >run on separate screens of a quad or even dual-head graphics card?  I
> >
> >
> I've done this with a matrox G550 dualhead card. It has only
> one busid, so the second X driver used the framebuffer
> driver. That driver uses none of the cards accelearation features,
> only the graphichs memory.  It was fast enough for 2D work
> like word processing and 2D gaming anyway.  Very light
> 3D stuff worked too, using software rendering.
> The first head used the matrox driver with all features
> and nice speed.
>
> I also tried to use two instances of the accelerated driver
> on this single card.  That actually works - by luck I guess,
> but still.  I didn't go for that solution because 3D didn't
> work at all, only accelerated 2D.
>
> These days I'm using two cards, with a radeon 9200SE in
> addition to the G550.  This allows accelerated 2D and 3D
> on both heads.  Unfortunately, the radeon driver in debian is
> quite buggy and hangs that X server a lot of the time.  So
> I'll probably have to replace the card.
>
> >have a Matrox G200 MMS Quad, which gives you 4 separate bus IDs for
> >the 4 different monitors, but I can't seem to get prefbusid to address
> >any monitor except for the primary (first) one.
> >
> >
> >
> Did you get prefbusid working in a test with actual separate cards?
> Experiment with that first.  If it doesn't work, then you might need
> a different xserver.  Not all of them support prefbusid.  Some,
> such as debian, want "isolatedevice" instead of "prefbusid".
>
> Also, some hardware drivers just don't work in dual/quad
> setups, this limits what cards one can use.
>
> Cards having separate bus IDs ought to behave just as a
> bunch of separate cards, but you never know if they
> cut some corners supporting this somewhat unusual feature.
>
> >I'm trying to get as many as 6 or 8 touchscreens running from one PC,
> >so I would really like to be able to use dual or quad head cards so I
> >don't run out of PCI slots. Has anyone had success with any dual or
> >quad head cards? If so, send me your recommendations, and maybe a copy
> >of your config files too if you're feeling generous.
> >
> >
> My two-card setup isn't exactly what you want, but I can
> mail you the config files if you think they may be useful anyway.
>
> Helge Hafting
>
>
>
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