This blog was written by Charles Rose, Linux Engineering
When using virtual console with Dell iDRAC on PowerEdge 12G servers and RHEL 7, you could experience some problems with keyboard / mouse functionality. For instance, during OS install, you can view the installer's Language/Country selection screen, but be unable to make a selection. Similarly, post-install the keyboard / mouse might appear to work for a few seconds and then stop.
There was a problem with auto suspend of USB devices that has been addressed in a newer iDRAC7 firmware release. Firmware versions 1.51.51 and later contain a fix for this behavior. With the newer firmware, the keyboard / mouse should work as expected and you should be able to perform a GUI install of RHEL 7.