Today I tried to recalibrate HP LP3065 that was connected to GTX580 on port 1 using XRite i1Display Pro. Basic profiling went just fine. I then switched to advanced profiling. When measurements in advanced profiling started screen went black and stayed like that, never changed and eventually I had to reboot machine. On reboot machine wouldn't show anything on screen, not even BIOS messages. Windows can boot but it displays only on port 2. BIOS messages are not displaying on neither port 1 nor port 2.
It is as if calibration software did something that affected / is affecting port 1 / default port and I hope this is resettable.