Dual head - internal Intel 815, several PCI cards

[Alex Deucher]

On 10/16/05, Jim Cornette <jim-cornette at insight.rr.com> wrote:
> Alex Deucher wrote:
>
> >On 10/15/05, Jim Cornette <jim-cornette at insight.rr.com> wrote:
> >
> >
> >>I have tried to configure Dual head using several different PCI video
> >>card in conjunction with the internal Intel 815 without any luck. The
> >>first attempt was with a Radeon 7000 video card that was broken during
> >>the time that I attempted to use it. I resorted to using the vesa drive
> >>for the radeon but ended up having trouble with the Intel seeming to
> >>overlap areas where the radeon using the vesa card crossed memory
> >>allocations. I could partly get the radeon card working but only if I
> >>used the vesa driver for the primary Intel builtin video.
> >>Using the vesa for the Intel 815 did not work with getting the
> >>monitor/display from displaying anything else but diagonal lines while
> >>the secondary radeon worked if the mouse was moved into where the
> >>display unblanked.
> >>Going through several other cards, an ATI  (PCI) and a Nividia (AGP)
> >>resulted in no dual head, but was able to use whichever card was set to
> >>primary through BIOS. The problem that I encountered was that the Intel
> >>would only allow reduced settings like 800x600 and the secondary card
> >>was always blank.
> >>
> >>To clarify how my motherboard 370SSM works, with AGP, it does not allow
> >>the builtin Intel to be usable at all. With a PCI, two video cards are
> >>functional if the PCI is primary in MS ME. The cards always seem to not
> >>use the PCI video memory on the cards, but tap into where the Builtin
> >>Intel uses memory which reduce the maximum resolution obtainable if you
> >>tried to use the tool for configuring xorg in Fedora called
> >>system-config-display. If I edited the xorg.conf file to include
> >>1280x1024, the Intel works great.
> >>
> >>Anyway, I obtained another MGA PCI video card, G200 and am interested in
> >>giving this combination a try. I have the card installed with the Intel
> >>as primary where the resolution is reduced to 800x600 and the Matrox is
> >>detected but not engaged if dual head is activated. I really would like
> >>to know how to get the PCI cards to utilize their on board memory
> >>instead of stealing from the memory pool that the Internal card needs to
> >>work properly.
> >>
> >>Is this feat possible? Any direction (except "get lost") appreciated.
> >>
> >>
> >>
> >
> >The add in cards will never use the integrated intel card's memory.
> >The integrated intel chips are AGP so you can only use them in
> >conjunction with PCI cards.  It seems your system has problems posting
> >secondary cards.  Can you post your X configs and logs somewhere?
> >
> >Alex
> >
> >
> There is surely something wrong with configuration, my BIOS or
> code/routines in xorg or system-config-display.The PCI cards "seem" to
> be trying to use external memory instead of the memory the cards have on
> board. I probably do not understand the memory for video AGP that much.
>
> I attached this to a cobwebbed bug report that I have open.
>
> https://bugzilla.redhat.com/bugzilla/attachment.cgi?id=120037
> https://bugzilla.redhat.com/bugzilla/attachment.cgi?id=120038
>
> The bug report is:
> https://bugzilla.redhat.com/bugzilla/attachment.cgi?id=120038

All this logs and configurations are for a single headed set up.  DO
you have any for your dualhead attempts?

Alex

> Thanks,
>
> Jim
>