Dale Dellutri wrote: > On Tue, Apr 16, 2013 at 2:47 PM, <m.roth at 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. > >> 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. Tried that. It fails. Tried no xorg.conf, no X. > > But are you sure the problem is in the xorg.conf? What does System -> > Preferences -> Display show? That's the fun one: it shows *one* monitor. I think I mentioned, xrandr shows 1, also. It *also* describes it as DisplayPort-0, though it doesn't like me using DisplayPort-0 for output, and I can't find what the output name *is*. But if I say xrandr --screen 1, it shows me DisplayPort-1. mark