The system is described in the attached nvidia-bug-report.log.gz, but briefly it is an i5, 32GB memory, lots of disk, running fedora 19 and a GTX 950 bought yesterday. I have NVIDIA-Linux-x86_64-355.06.run installed. The two monitors attached are an Acer K272HUL and an ASUS PB 282, both are 2760x1440 and connected by displayport. The bug report was created after restarting the X server (startx – -logverbose 6) and running then running nvidia-bugreport.
I can’t find any interesting differences in what nvidia-settings displays, except perhaps under GPU 0 and selecting each listed monitor and clicking on the Information tab. The acer always shows 4 or 5 lanes @ 540 Gbps and the asus always shows 4 lanes @ 2.70 Gbps.
When X starts, both screens are recognized and configured by the x server and nvideo-settings, but the Acer never gets a video signal and remains in power-saver mode. For a brief period, I can coax it into life by
- unplugging the asus DP (display port)
- moving the acer DP to the one that was used by the asus. At this point the acer gets a video signal
- plugging the asus DP into the one that the acer was on. Usually both screens will then have video, but there will be a very brief flicker in the acer every 10-20 seconds, and after a minute or so, the acer will turn off.
I also have a stack of old Quadro NVS 295 cards with two DP ports. All of these work with both screens active, but very slowly in comparison.
nvidia-bug-report.log.gz (137 KB)