Usually you can only run the dconf compiz reset from inside the desktop session - you may be able to get it to attach to the running dbus instance from your virtual console by setting the DISPLAY environment variable appropriately e.g.
Code:
DISPLAY=:0 dconf reset -f /org/compiz/
Code:
DISPLAY=:0 setsid unity
or just export the variable first
Code:
export DISPLAY=:0
dconf reset -f /org/compiz/
setsid unity
In case the X server didn't start on display :0 (sometimes happens if you also run headless sessions) then you can check the output of ps e.g.
Code:
ps -ef | grep vt[7]
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