Modem busy error message for user

[r3b007]

When logged on as a user i get a ttys0 device busy error message when trying to initialize the modem.

Im attempting to connect using wvdial.

I can initialize the modem fine as root.

Ive changed the permissions on wvdial and wvdial.conf to 777 but no joy!

Any ideas?

[mdwatts]

See what is making /dev/ttyS0 busy.

lsof /dev/ttyS0

[r3b007]

Ive no idea what is making /dev/ttyS0 busy.
Im not next to my *nix box right now so cant issue that command.

Its puzzling why root can initialize the device but all other users cant...

[mdwatts]

Does wvdial use pppd? If so, try searching the JL forums and Google for Linux for

'pppd user permission'

[sploo22]

Hmm... you said you set the permissions on wvdial and wvdial.conf, did you also check the ones for /dev/ttyS0?

Also, it could be that something is causing the modem to be busy only when a user is logged in. Try logging in as root and then su'ing to a normal user.