hmm... don't know. I would amend it anyway to include Xorg perhaps (at least try that)
killall -STOP cvm
Xorg
and
killall -CONT cvm
Xorg
might be a before and after option.
Clearly have ssh access before messing about with that.
I also have NO idea if the 4 even has an Xorg. just to be clear. now I do..