ViewSonic VG920 Silver-Black 19" 8ms LCD Monitor 270 cd/m2 550:1 Built in Speakers 0.294mm Pixel Pitch.

Fc5 did not detect this exact monitor, you can manually select the VG910s or b which has the same sync settings. Or do what I did and add the monitor to the /usr/share/hwdata/MonitorsDB file
ViewSonic; ViewSonic VG920; VSCDA18; 30-82; 50-75