Why is the /dev/ttyUSB0 (modem) locked?

[marko]

I've added the groups "dialout" and "lock" to my normal user, but when I try to dial the modem to send a fax, Fedora 16 insists that the device is locked. But looking in /var/lock/lockdev shows no lock and
the ownership of /dev/ttyUSB0 is:

ls -l /dev/ttyUSB0

crw-rw----, 1 root dialout 188, 0 dec 11 22:49 /dev/ttyUSB0

since the ttyUSB0 is read writeable to the dialout group and my user is in that group, why can't
I unlock and use the modem?

this confirms I have the dialout and lock groups:

id -a mos
uid=1000(mos) gid=1000(mos) groups=1000(mos),10(wheel),54(lock),18(dialout)

Note that I have also added the "mos" user to the mgetty-sendfax "fax.allow" file
and the ttyUSB0 is a Prolific PL2303 usb to serial adapter which connects the Fedora 16 usb port to the USR external modem's serial port. The fax can send ok as root.

[fdrake]

nevermind.... i missed 1 group name while reading..

EDIT:
do you have any entry in "/etc/tmpfiles.d/lockdev.conf" ?

[marko]

I don't even have that file, should it exist?

Anyway, I've been retrying my efax-gtk that I built from source and it seems to work well enough (the problems I had in the original post were trying to fax
using 'sendfax' command line directly) that I'll go with it. I suspect efax-gtk handles the device more correctly than sendfax.

Mark