I did exactly what is described here http://forum.bitcoin.org/index.php?topic=3356.msg47489#msg47489
to activate the two cards on Ubuntu Mavrick .. but once the first reboot is issued there is no GUI and monitor displays no signal.
Also the same for Ubuntu Natty http://forum.bitcoin.org/index.php?topic=7514.msg110334#msg110334
just upon the reboot no GUI and no signal on monitor
Cards have dvi output and I use converter to get the first one to a normal LCD display.
every command described in the tutorials just does not work afterwords.
any help ?