I have a GTX670 graphics card and a Philips BDM4065UC monitor which is configured for displayport 1.2.
When I run Ubuntu 14.04.2 (amd64) from a USB boot mode using the tryme mode, my screen comes up as 3840x2160@60hz, so I know the card/monitor/driver configuration works.
When I run the install everything is fine, but after I reboot I only get 3840x2160@30hz. I've tried using xrand, and as far as the system is concerned, 60hz is not supported.
To fix this, I figured the easiest way would be to copy the appropriate config files from the tryme setup into my permanent setup (I can easily reproduce this by booting from USB).
Has someone come across this before, and can tell me how to fix my configuration to get 60hz?
here is my monitors.xml file
no VSC 0xf62b 0x01010101 1920 1080 60 0 0 normal no no yes PHL 0x08e1 0x000016ec 3840 2160 60 1920 0 normal no no no