I have a test system running Ubuntu 14.04 with the Quadro K1200 currently installed and connected to 2 monitors - a Dell U3014 and a EIZO EV2750.
Prior to this issue this set up was working fine.
In the process of trouble shooting an unrelated issue, I disabled the Dell monitor using the All Setting > Displays on/off toggle switch within Ubuntu.
This caused the Dell monitor to disappear from the Display manager preventing me from re-enabling it.
I then re-installed the OS, expecting this to revert the settings and both monitors to be enabled, it made no difference.
I have a number of both these monitor models to test with. I can connect a EIZO to each of the 4 Display ports and they all work as expected. If I connect any Dell U3014 to any DP the monitor is not detected.
Connecting only a U3014 and restarting the PC the monitor detects no output, not even during boot.
As best I can tell the U3014 monitors are not detected by the video card at all, there is no evidence of them being connected either in xrandr:
Screen 0: minimum 8 x 8, current 2560 x 1440, maximum 16384 x 16384
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
DP-3 disconnected (normal left inverted right x axis y axis)
DP-4 connected primary 2560x1440+0+0 (normal left inverted right x axis y axis) 597mm x 336mm
2560x1440 60.0*+
1920x1200 59.9
1920x1080 59.9
1680x1050 60.0
1600x1200 60.0
1600x900 60.0
1280x1024 60.0
1280x800 59.8
1280x720 60.0 59.9
1024x768 60.0
800x600 60.3
720x480 59.9
640x480 59.9 59.9
DP-5 disconnected (normal left inverted right x axis y axis)
DP-6 disconnected (normal left inverted right x axis y axis)
DP-7 disconnected (normal left inverted right x axis y axis)
Or in the Nvidia X Server Settings.
This specific monitor model appears to have been disabled directly on the card, any thoughts on how I can reverse this?
Thanks!
nvidia-bug-report.log.gz (161 KB)