On Tue, 2015-06-16 at 16:00 -0400, Ilia Mirkin wrote: > On Tue, Jun 16, 2015 at 3:53 PM, Stephen Adler < > [email protected]> wrote: > > On Tue, 2015-06-16 at 15:47 -0400, Ilia Mirkin wrote: > > > On Tue, Jun 16, 2015 at 3:33 PM, Stephen Adler < > > > [email protected]> wrote: > > > > Guys, > > > > > > > > Is there support for display port 1.2 with the nouveau driver > > > > and > > > > GTX > > > > 970? > > > > > > > > I have a dell 4K monitor and to run it in 4K mode at 60Hz I > > > > need to > > > > configure the monitor to run version 1.2 of the display port > > > > protocol. > > > > the nouveau driver works well with display port 1.1 but I only > > > > get > > > > a > > > > 30Hz refresh rate at 4K resolution. > > > > > > The DP 1.2 540MHz rate should be supported. However there is > > > presently > > > no MST support, so if the monitor has 2 internal panels, that > > > won't > > > pan out so well (yet). > > > > > > Also note that the GTX 970 requires signed firmware from NVIDIA > > > to > > > use > > > any acceleration, and we haven't quite yet figured out how to get > > > that > > > going. This means that all you get is modesetting, no > > > acceleration. > > > Esp with a 4K screen, using llvmpipe may feel slow if you use a > > > GL > > > compositor, as many modern desktops do. > > > > > > -ilia > > > > > > > Thanks for the quick response. I'm having a hell of a time with the > > nvidia driver since I have three 4K monitors which hook up to the > > GTX > > 970 card, but in linux it will only drive two of the 3 monitors. > > The > > monitors do have the dual internal panels each running at 1920x2160 > > or > > something like that. For some reason nvidia only drives 4 of the > > panels > > (two monitors) per GPU... > > Kepler+ GPUs only have 4 CRTC's, so you can only scan out 4 things at > a time [pre-Kepler have only 2 CRTC's]. However perhaps you can have > a > single CRTC split an image up into 2 encoders, I don't really know > how > that works, esp in the context of DP-MST, where it's really a single > encoder. > > > > > Is the MST support imminent? or off into the future? > > It's on the horizon... a horizon, of course, being an imaginary line > that keeps moving further away as you attempt to approach it :) > Here's > Ben's tree from a year ago (which BTW has no support for your GPU at > all): > > http://cgit.freedesktop.org/~darktama/nouveau/log/?h=devel-mst > > AFAIK he's been putting it off, trying to combine it with a > conversion > to atomic modesetting. > > -ilia >
Thanks Ilia, you certianly seem to know what your talking about... So... how about this question? Would you be familiar with the Base Mosaic and/or SLI mosaic configurations for the nvidia driver? specifically if they work with geforce cards? I know they work with quadro cards. (At least the base mosaic does with the quadro cards.) I may just get me another card to solve the 3 monitor problem. thanks for all the feed back! Steve. _______________________________________________ Nouveau mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/nouveau
