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  • Eyefinity Ubuntu Lucid

    I am looking at getting a 5870 eyefinity 6 edition card. The drivers in ubuntu lucid (10.04) say they support eyefinity.

    From what I can see these (http://www.amazon.com/gp/product/B00...A3V6BK4D0HKA8F) mini-displayport to vga adapters should work.

    What I want to do is setup a 4x1 eyefinity setup of 1920x1200 monitors for a total of 7680x1200. That is supposed to be a supported resolution option.

    Will this work without xinerama or anything like that? Will stuff like composite work? Right now I have dual 8800 GTS nvidia cards with xinerama and it is pretty slow mostly because of lack of composite. When I tried it with xgl long ago it was very very fast but crashed a lot. Eyefinity is supposed to solve this problem.

    I don't really care if compiz actually works although that would be nice. I mostly want to not use xinerama anymore as a primary feature and allow kde to work across all 4 monitors as one desktop. My secondary feature would for it to be much faster then the current xinerama setup which is not hard to beat. I would love if it supported composite correctly so that desktop effects could be enabled in kde since that also makes it run a heck of a lot faster when I tested that using just two monitors.

    Thanks

  • #2
    Originally posted by koshcu View Post
    I am looking at getting a 5870 eyefinity 6 edition card. The drivers in ubuntu lucid (10.04) say they support eyefinity.
    really? is it in the package summary or something? please confirm

    Comment


    • #3
      Originally posted by fluxion View Post
      really? is it in the package summary or something? please confirm
      It is in the changelog that I found it. https://launchpad.net/ubuntu/+source...ler/+changelog just look in there for eyefinity and it says it supports it. It was also reported on this site a while ago but no idea if someone actually tested it. It could be a bad changelog.

      I am really hoping it works because I am tired of xinerama with two nvidia cards. However I won't order one until I know that eyefinity actually works under linux.

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      • #4
        You can use at most two of the cheap passive DisplayPort to DVI adapters. Connecting further monitors requires native DisplayPort or expensive active adapters (usually marketed as "DisplayPort to Dual-Link DVI").

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        • #5
          Originally posted by chithanh View Post
          You can use at most two of the cheap passive DisplayPort to DVI adapters. Connecting further monitors requires native DisplayPort or expensive active adapters (usually marketed as "DisplayPort to Dual-Link DVI").
          I was not planning on using displayport to dvi. I was planning on using displayport to vga. From what I read all displayport to vga adapters are active because they have to be to create the vga signal. They just power off the port since they are very low power. In the widescreengaming forums people report that they do work for eyefinity.

          My monitors don't even have dvi input. They have vga, hdmi, composite and a few others but no dvi. The displayport to hdmi stuff active adapters are pretty expensive and when I have tested my monitors with vga input vs hdmi input at 1920x1200 I can't see any difference so the vga adapters seemed like the best option.

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          • #6
            hdmi is the same as dvi technically - just buy a cheap cable if you need dvi on one side.

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            • #7
              Well the 5870 eyefinity 6 has 6 mini displayport connectors. To run 4 monitors 2 of the connectors must be active connectors. Active dvi/hdmi connectors are $100 but active vga connectors are $10 and the quality output between hdmi and vga seems to be identical.

              It just seems to make more sense to use 4 mini displayport to vga adapters then active dvi/hdmi ones. It is far far cheaper and at least on my monitors I have I can't see any difference between hdmi and vga connections. On my 8800GTSs running my monitors at 1920x1200 with either hdmi or vga the output looks exactly the same to me.

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              • #8
                That's just too funny, in that case you could buy 2 nv cards too when you need dvi on 4 monitors

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                • #9
                  I have dual 8800GTS cards right now and I want to get away from dual cards. Xinerama is buggy and slow. Eyefinity should completely deal with that problem. I could connect all the monitors with hdmi using two passive adapters and two active adapters but hdmi does not give any higher quality then vga does.

                  I even did a fair bit of research online for that and a lot of people would claim the all digital connection was better but no tests which actually showed that expect on very early lcd monitors. Later ones fixed those problems.

                  I just wanted to know if eyefinity would actually work correctly and that I would get normal acceleration across all 4 desktops and hopefully stuff like the composite extension working.

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                  • #10
                    Do you REALLY expect that something from ati just works with Linux? Have fun...

                    Comment


                    • #11
                      I already have a lot of experience that stuff from nvidia does not just work either and no real hope of that getting better. If you only run two monitors it is fine. If you run 4 with two video cards then it is not so trouble free.

                      The eyefinity 6 card can do 6 monitors in hardware so no xinerama needed anymore as long as eyefinity works under linux. The whole thing is presented as a single display to xorg or at least theoretically. So even things like composite should work and amd has shown far more interest in open source then nvidia has.

                      They may not be better now but it sure looks like it will long term. Right now as long as it is better for running 4 displays for 2d work quicker then dual 8800GTS with xinerama that is what I really care about. 3D is not important to me.

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                      • #12
                        Do you need 3d speed?

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                        • #13
                          I don't need 3D at all right now. Fast 2D is mostly want I want and composite would be very nice to have. My understanding though is that with eyefinity 3D does work at least well enough for anything that kwin would use for desktop effects.

                          I don't care about any gaming though or running actual 3D apps. When I run just two monitors and can enable desktop effects the system is FAR faster. You can move windows around without lagging, they show up faster, far lower cpu load when using them. Even scrolling webpages used up a lot less cpu time.

                          However running two monitors or two sets of two monitors is a major pain. 4 monitors is much more productive since I can see my code, output, logs, docs etc at the same time. Eyefinity should be the solution to this problem. I just don't know if it really works yet on linux. If it doesn't I will wait and just live with the nvidia problems for a while but would prefer not to.

                          With Xorg 1.7 xinerama is pretty much broken. At random times when moving the mouse between monitors it will get stuck between them and Xorg will be frozen and just use up more and more memory. I have not seen any good patches for that yet either. Xinerama has been screwed up many times over the last few years of X releases. I would like to get completely away from it and still use 4 monitors.

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                          • #14
                            Maybe you want to try nouveau then? Nvidia directly supports what you want only with the expensive Quadro series.

                            Comment


                            • #15
                              xrandr still does not support mutli-gpu objects which is needed to turn them all into a single screen. So even with nouveau you have to deal with xinerama to make a 4 screen setup or at least that is my understanding of it. So that might make some 2D stuff faster but I would still have xinerama bugs to deal with..

                              The quadro cards that can run 4 1920x1200 monitors in a 4x1 setup where very expensive last I checked. They also are FAR too loud and hot. The 5000 series ati card are quieter and far lower power usage.

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