[SOLVED] Setting the "main" monitor in X.org

Sevalecan · n00b Joined: 29 Jun 2004 Posts: 18

I've had dual monitors set up for quite some time on my machine. I have a single nVidia GeForce 7300 GT with both a VGA port and a DVI port on the back.

Originally, my setup was like this:

CRT plugged into VGA port on the video card,
LCD plugged into DVI port on the video card using a DVI->VGA adapter.

I used the LCD as my main monitor, the taskbar was on it and when I played fullscreen games, that's the monitor they'd set the mode on. Everything was fine and dandy. But today I got a new LCD to hook in side by side with the old one. It's larger and higher resolution, so naturally I wanted to use it as my primary screen or whatever X thinks that is. I moved the old LCD to the vga port and plugged the new monitor into the DVI port (this time without a DVI->VGA adapter).

I changed a few settings for the higher resolution, and started X up.. But at this point, the new LCD is still playing the old CRT's role. I wanted to change that, so I messed around with my X configuration. Alot. And no matter what I do, my old LCD is always being used as the primary screen.

I got a new config for X from scratch, and this is what I have so far:

jormaa · n00b Joined: 29 Nov 2007 Posts: 12

Using Nvidias TwinViewXineramaInfoOrder worked for me when i had similar problem.

Sevalecan · n00b Joined: 29 Jun 2004 Posts: 18

Well, that didn't work. But I figured maybe that's because I wasn't using TwinView. So I finally decided to see if there were some docs for the nvidia drivers in /usr/share/doc and opened up the readme. I added this to the first device section in my xorg.conf:

taipan67 · Posted: Fri Jan 16, 2009 5:05 pm Post subject:

I've never looked into doing this, as i've never had 2 monitors to plug into my card's sockets at the same time, but i'm wondering if you ought to have different BusID's for each 'Device'? If you look through /var/log/Xorg.0.log, you'll probably find that the VGA-socket is found at BusID PCI:3:00:0 and the DVI-socket at PCI:3:00:1 - see the difference? Dunno if that affects the setup, though - as i said, it's just a theory...

_________________
"Anyone who goes to see a psychiatrist should have their head examined!"

Sevalecan · n00b Joined: 29 Jun 2004 Posts: 18

No, they are both on the same graphics card with the same GPU. The reason I need to specify the BusID at all is to tell it that it's the same card as before. All this is mentioned in Chapter 15 of the nvidia-drivers' README.bz2 in /usr/share/doc/nvidia-drivers. And possibly somewhere in man xorg.conf as well. Anyway, the problem is solved for the most part. It's just that Unreal Tournament still spawns it's window at 0,0 when fullscreen, which is on the monitor to the left and not screen 0.. I think it's just because it's so old, but I haven't tried any other games or programs with it yet.