I hope i am in the right session, otherwise i apologize.
I have the following configuration:
nvidia NVS 310 on a Fujitsu PC with two monitor connected by Display Port cables (2560x1440 resolution) on a Debian 7 (Wheezy) system. I am using nvidia-drivers and Xorg.conf. Here the list of packages
ii libgl1-nvidia-alternatives 304.131-1
ii libgl1-nvidia-glx:amd64 304.131-1
ii libglx-nvidia-alternatives 304.131-1
ii libxvmcnvidia1:amd64 304.131-1
ii nvidia-alternative 304.131-1
ii nvidia-glx 304.131-1
ii nvidia-installer-cleanup 20120630+3
ii nvidia-kernel-common 20120630+3
ii nvidia-kernel-dkms 304.131-1
ii nvidia-settings 304.88-1
ii nvidia-support 20120630+3
ii nvidia-vdpau-driver:amd64 304.131-1
ii xserver-xorg-video-nvidia 304.131-1
What i experience is that (not always but quite often) when Xorg is started right after the PC power on, only one of the two monitors is detected and configured (DP-2), while the other (always on the secondary display port DP-3) is left blank. From the Xorg log (attached) i see that only one “valid display device” is recognized. By lounching nvidia-settigns in this configuration, the DP-2 monitor is correctly configured and listed, while DP-3 is blinking (it continuosly appears and disappears from the list)… the same behavior while monitoring the Xrandr output (DP-3 continuosly jumps from connected to disconnected).
Restarting Xorg solves the problem, but at any random startup of the sytem problem is always there.
I have no idea how to get out of this. Can someone please help?