CentOS - Dec 2008 - User access to /dev/ttyUSB0

I have been trying to get an EVDO modem to work with Centos 5.  I can make it
dial out with wvdial only when I'm the root user.  Otherwise I get this
error:

Cannot open /dev/ttyUSB0: Device or resource busy

I added the user to the uucp group.

crw-rw---- 1 root uucp 188,  0 Dec  3 02:30 /dev/ttyUSB0
crw-rw---- 1 root uucp 188,  1 Dec  3 02:30 /dev/ttyUSB1
crw-rw---- 1 root uucp 188,  2 Dec  3 02:30 /dev/ttyUSB2
crw-rw---- 1 root uucp 188,  3 Dec  3 02:30 /dev/ttyUSB3

What have I missed?


-- 
MELVILLE THEATRE ~ Melville Sask ~ http://www.melvilletheatre.com
DRY CLEANER BUSINESS FOR SALE ~ http://www.canadadrycleanerforsale.com

> [mailto:centos-bounces at centos.org] On Behalf Of Frank Cox
> Sent: Wednesday, December 03, 2008 3:50 AM
> To: centos at centos.org
> Subject: [CentOS] User access to /dev/ttyUSB0
> 
> I have been trying to get an EVDO modem to work with Centos 
> 5.  I can make it
> dial out with wvdial only when I'm the root user.  Otherwise 
> I get this error:
> 
> Cannot open /dev/ttyUSB0: Device or resource busy
> 
> I added the user to the uucp group.
> 
> crw-rw---- 1 root uucp 188,  0 Dec  3 02:30 /dev/ttyUSB0
> crw-rw---- 1 root uucp 188,  1 Dec  3 02:30 /dev/ttyUSB1
> crw-rw---- 1 root uucp 188,  2 Dec  3 02:30 /dev/ttyUSB2
> crw-rw---- 1 root uucp 188,  3 Dec  3 02:30 /dev/ttyUSB3
> 
> What have I missed?
Hmm Lets see here... system-config-network Select (highlight) your PPP
Adapter, then click on Edit. That will be under the Devices Tab. Next Look
under the General Tab. Place a Check in "Allow all Users to enable or
disable the Device".

JohnStanley