Disabling the Virtual Terminal Functionality
On the PCoIP Software Client for Linux using Ctrl+Alt+F12 will switch to virtual terminal 12, which typically does not exist. This can result in a blank screen. To avoid this you can disable virtual terminal functionality by creating a file /usr/share/X11/xorg.conf.d/60-pcoip.conf with the following contents:
Section "Serverflags"
Option "DontVTSwitch" "yes"
EndSection