On Mon, Aug 27, 2018 at 9:57 AM, Andrew Lunn <andrew at lunn.ch> wrote: > On Mon, Aug 27, 2018 at 09:29:40AM -0500, o1bigtenor wrote: >> On Mon, Aug 27, 2018 at 8:44 AM, Andrew Lunn <andrew at lunn.ch> wrote: >> >> Running as previously, on Debian testing (10 or buster) with a pile of >> >> ram and and (lots of resources), with what may be more unusual is 2 >> >> graphics cards and 4 monitors set up as 2 x-screens. (Would love to >> >> condense that into 1 screen if someone has the know how and can >> >> describe it but 2 works well enough even if 1 would be quite slick >> >> (and very 'interesting').) >> > >> > Are the two cards from the same vendor? Or different vendors? >> >> Both are nvidia 570 cards from the same vendor. >> > >> > I've done this in the past using Xinerama. >> >> I am using xinerama but using 2 xscreens. Its using only 1 xscreen that >> I don't know anything about! > > You should not need to use Xinerama in order to have one Xserver merge > two screens on a single card. > > Ah, hold on. Are you using the proprietary nvidia driver? Maybe you > have to use Xinerama for that driver? > > All the open source drivers should drive two displays on one card > without any additional configuration. You bet they run 2 screens from one card but they also don't seem to see the other 2 cards (3 total) so that didn't much help things. > > You might also find the open source driver just correctly finds two > cards, four displays, and it all just works out of the box. Sorry - - - - not a chance!! > > But there is a trade off. The open source drivers might just work out > of the box, the nvidia proprietary stuff will give you better > performance. If it is a gaming machine, you probably want the > performance. If its just a developers box, where you just need large > screen acreage, mostly text, the open source driver might be > sufficient. Not a gamer (at all!) but I do want things to work and as I couldn't tame nouveau - - - - oh well it was the proprietary solution (I don't think nvidia really gives a flying rat's patootie about linux drivers!!! as their track record shows (if someone wants to argue!!).) I spent far too many hours over far too many days to try to achieve my own solution to getting nouveau working. If someone has a solution - - - well I'm all ears but I couldn't figure out how to use randr1.5, which CAN do this, set up to use multiple cards and multiple monitors. Regards Dee