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Hello all,
I am having trouble configuring my multi-monitor setup in KDE. I have two nvidia graphics cards (gtx560 and gtx 260). I am using the proprietary nvidia drivers because I game alot on the system. Currently, I run two monitors off the 560 and everything works fine. I have an extra monitor laying around so I tried pluggin it in and tried getting it to work on the 260 card. Unfortanately, I can't get things to work out quite right.
Here is what I have tried so far.
1) Tried xrandr but it doesn't see my new monitor as connected.
2) Used nvidia-settings to configure the setup. I sort of got this setup working. I had to setup the third monitor as a separate x screen, which is fine because I just want it to display various chat applications. Unfortanately, when I got this working it messed up the display on my other two screens. It treats the other two screens as one big screen. Meaning that the wallpaper is spead accross the two screens and if I launch a game, it spreads out accross both screens. Most other applications work fine though.
I read that I need to use mosaic but I haven't been able to get it to work. I've tried enabling it in the nvidia-settings. The arch wiki says that you can't but I saw the option and tried it anyways. I also tried enabling it using the nvidia-xconfig --base-mosaic command. Both methods yielded the same results. When I restart X, the third monitor (one on 260 card) goes black and the other two return to their normal state.
I've tried searching around but I haven't found anything that fixed my problem.
Any help would be much appreciated.
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IIRC, nvidia added xrandr support to their proprietary drivers in v304 (which is now old), so it should work with xrandr... not sure what's up with that.
If two of the monitors are acting as one, that sounds like TwinView... a checkbox in nvidia-settings can turn that off. Using separate X screens for all monitors is the other alternative, just make sure to turn on Xinerama support so that you can drag windows between them.
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So I've finally had time to mess with this some more. Your suggestion about using 3 separate X-servers got me most of the way to what I want. I'm currently running 3 separate X-servers, this allows me to use all three monitors. I tried to get Xinerama to work but it just crashed my X-server. I checked on the wiki and it says that Xinerama is broken for the latest nvidia drivers. So right now I can't move applications from monitor to monitor. Its not the end of the world but I feel like I should be able to get this working better. Right now the whole setup feels a bit "janky".
Any other suggestions?
Thanks for the help TheAmigo.
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