Re: How to debug 3G USB modem problems?

[Uwe Geuder <networkmanagerList-ugeuder snkmail com>]

Thanks Dan for your quick reply. It's too late here for taking more
logs so let me just reply quickly on your other questions.

> Huh, because they are $120 on eBay which isn't cheap at all :)
> Otherwise I'd buy one.

This operator http://saunalahti.fi/ gives you one "for free" even you
just shop for a cheap fixed-line ADSL. Sounds unlikely that they pay
very much for them, because their prices are on the cheaper side
compared to the competitors even if you don't count the 3G modem at
all. Might not be an option for you though :( Maybe they get cheaper
on ebay.fi when many people end up with one without intending to use it.

> What does the PPP debugging say when this happens?  NM wont' terminate
> the connection unless PPP says it's down.

I would have included the log if I had it :( I have seen it when using
command line, but I did not store it. My point and main question was
how to get the logging to work when network-manager runs as a
service. Because I can only test occasionally, the real user is not
familiar with the command line and she has no root access.

Hmm, actually I just find a copy on another machine.  (And weird enough the
pppd logging I was complaining about *IS* in that syslog)


May  4 14:11:39 geuder-u10 pppd[1783]: Using interface ppp0
May  4 14:11:39 geuder-u10 pppd[1783]: Connect: ppp0 <--> /dev/ttyACM1
May  4 14:11:39 geuder-u10 pppd[1783]: sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x5a37c2dc> <pcomp> <accomp>]
May  4 14:11:59 geuder-u10 pppd[1783]: last message repeated 6 times
May  4 14:11:59 geuder-u10 NetworkManager: <WARN>  pppd_timed_out(): Looks like pppd didn't initialize our dbus module
May  4 14:11:59 geuder-u10 NetworkManager: <info>  (ttyACM1): device state change: 7 -> 9 (reason 14)
May  4 14:11:59 geuder-u10 NetworkManager: <info>  Marking connection 'Saunalahti Postpaid (contract) 1' invalid.
May  4 14:11:59 geuder-u10 pppd[1783]: Terminating on signal 15
May  4 14:11:59 geuder-u10 pppd[1783]: sent [LCP TermReq id=0x2 "User request"]


To me it looks that pppd does not get or not recognize any responses
(rcvd lines) although it sends its first message uplink 7 times
altogether. So NetworkManager decides to kill it after 20 seconds.

I'll try to capture full logs including modem-manager later.

Regards,

Uwe