On Tue, Apr 16, 2013 at 2:47 PM, m.roth@5-cent.us wrote:
Dale Dellutri wrote:
I've just test an ATI FirePro 2460 graphics card on CentOS 6.4. It connects 4 monitors. It worked with the standard radeon driver. I was able to arrange the monitors into my preferred configuration (as a square array, 1 upper left, 2 lower left, 3 lower right, 4 upper right) simply by clicking System -> Preferences -> Display, and then moving the four monitor images. This creates the file ~/.config/monitors.xml .
<snip> > I also tested two other cards: ATI FirePro 2450 and NVidia Quadro NVS 420. > For each of these cards, the BIOS shows the card in slot 1 as a PCI > Bridge. > lspci reports two identical video cards at 03:00.0 and 04:00.0. > Though it's easy to set up two screens properly, xinerama would probably > be required in an xorg.conf to get all four screens working properly.
Would you mind sending me your xorg.conf offlist? I *may* have found something in the one I've been handcrafting, but as my user is busy, I won't be able to try it out for a while, and would love to see what you did.
As I said, when I used the ATI FirePro 2460, there was NO xorg.conf created or required. I would have needed one for the ATI 2450 or the NVidia NVS 420, but I never tried to create one.
I'm still at the point of him having one monitor working fine, but the other comes up, not mirrored, but unreachable by keyboard or mouse. Looking at his old xorg.conf that worked with kmod-fglrx, and my own (an NVidia card) I realized they only have one Screen sectiuon, and a viewport on his (mine, of course, has twinview), so I've just edited his that way.
I suggest that you restart the machine without X (in run level 3), then as root do: # X -configure which will write a new xorg.conf.new in the current directory.
But are you sure the problem is in the xorg.conf? What does System -> Preferences -> Display show?