I think that this is an issue that should be fixed. Neither kppp nor
wvdial are usable by default.
I use default Ubuntu 9.04 beta installation. I tried to set up GSM/EDGE
connection with NetworkManager, but it didn't connect displaying no
error messages.
Then I installed kppp and launched it from console. It didn't connect too. The
output to console was the following
kppp(13887) Modem::opentty: Opening Device: "/dev/ttyACM0"
Opener: received OpenDevice
Opener: received ExecPPPDaemon
Kernel supports ppp alright.
received unexpected SIGCHLD.
In parent: pppd pid 13911
Opener: received OpenResolv
error opening resolv.conf!
Couldn't find interface ppp0: No such device
Couldn't find interface ppp0: No such device
Then I installed wvdial. It didn't connect too, but fortunately it wrote about
the cause
--> PPP negotiation detected.
--> Unable to run /usr/sbin/pppd.
--> Check permissions, or specify a "PPPD Path" option in wvdial.conf.
Then finally I found out that a user should be in dip group to be able
to launch pppd. After adding the user to that group both kppp and wvdial
started connecting.
** Changed in: ppp (Ubuntu)
Status: Invalid => New
--
/usr/bin/pppd has group owner dip, not dialout
https://bugs.launchpad.net/bugs/292203
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