I have installed C2050 on a number of HP Z800 machines. Ubuntu servers are installed on them, except one has GNOME enabled to use graphics. On this machine, a separate GPU GTX380 is dedicated for graphics display. On the other machines, monitor is plugged into one of the C2050 for console display.
When the machines start, I need to run ./deviceQuery as root on every machine. Otherwise, my program using GPU cannot detect any GPU available on the machines. I’m not sure why, but this is fine, except that after running ./deviceQuery, it messed up with the C2050 display causing all monitor become unavailable, i.e. it shows some blinking rectangles (attached file). It avoids me to work with the machine directly. Any one has a similar issue or a solution to resolve this.
You need to create device entries in /dev with suitable access rights (which happens automatically if you run deviceQuery as root, but fails for normal users because of insufficient permissions). The release notes have a script to automatically do this at boot time.