I had downloaded Ubuntu 7.10 with great expectations. To my dismay i found after installation that, i wasnt able to configure the broadband. On issuing the sudo pppoeconf, i get this
"Sorry, I scanned 1 interface(s), but the Access Concentrator of your provider did not respond. Please check the network card and modem cables. Another reason for the scan failure may be another running pppoe process which controls the modem"
It worked without any hiccups in 7.04. Did some research of my own, came to know many faced it, even posted it in the ubuntu forum, but to no avail.