I tried that before answering to you first time (even when I thought it will not work) and effectively not worked. pointing to the file with --conf does not work either, nor does deleting the configuration.
Issue is that cgminer does not recognize my card
cd into the cgminer folder
export DISPLAY=:0
export GPU_USE_SYNC_OBJECTS=1
Then try,
./cgminer -n or directly ./cgminer
EDIT :
https://docs.google.com/document/d/1Gw7YPYgMgNNU42skibULbJJUx_suP_CpjSEdSi8_z9U/edit^^ Same steps given there, for Xubuntu (Ubuntu based, ie Debian based)