Re: [Linux-fbdev-users] Multiple Video Cards

[Petr V. <van...@vc...>]

James Lehman wrote:
> Fedora Core 4 : kernel 2.6.12.1

Hello,

> 1. Single Matrox AGP 32MB G400 Dual Head.
> All I get is one head. That's it. The other head is black.

Do you have enabled support for secondary head on G400?  You need i2c
built into kernel to get an option to enable G400's second head (or
both must be modular).

> 2. Single Matrox AGP 16MB G450 Dual Head
> From power on all through boot up, the two heads put out exactly the same image.

Did you tried 'matroxset' to configure outputs?  By default CRTC1 (/dev/fb0)
is displayed on both outputs to match G550 BIOS's behavior.

> 4. Single Matrox AGP 16MB G450 Dual Head + Multiple Matrox PCI (Millennium I, II & Mystique)
> From power on all through BIOS and into Linux boot up, the two heads on the G450 put out exactly the same image and are the primary display. As soon as Tux appears, he's on the first PCI Matrox card and the Linux boot continues with that as /dev/fb0. The AGP card is /dev/fb1 and additional PCI cards are 2, 3, etc.

Again, you need matroxset to configure relation between /dev/fbX and its outputs.
Depending on number of cards you have in the box and modular/builtin drivers
second head of G450 may be enumerated after all other primary cards.  'cat /proc/fb'
or `dmesg` should tell you which device is where.

> 5. Single Matrox AGP 32MB G400 Dual Head + Multiple Matrox PCI (Millennium I, II & Mystique)
> Just one head on the G400 and it is the primary boot display. As soon as Tux appears, he's on the first PCI Matrox card and the Linux boot continues with that as /dev/fb0. The AGP card is /dev/fb1 and additional PCI cards are 2, 3, etc.

You apparently do not have configured support for dualhead G400, like in
#1.
								Petr