Re: Mobile Broadband - how do I trace/debug the modem initialisation?

[Craig Main <cmain fnb co za>]

On Mon, 2008-10-20 at 13:26 -0400, Dan Williams wrote:
> On Mon, 2008-10-20 at 17:55 +0300, Tambet Ingo wrote:
> > On Sat, Oct 18, 2008 at 2:59 PM, Rick Jones <rick activeservice co uk> wrote:
> > > Where are the actual dialling protocol exchanges defined - are they
> > > hard-coded? Not being able to script this bit of the connection seems to be
> > > problematic, compared to pppd. I'd really like to move to NM instead of
> > > messing with pppd, pon, poff etc. but I can't get past the first hurdle :(
> > 
> > If you have recent enough NM (r4155 or newer), you can turn on serial
> > debug with NM_SERIAL_DEBUG environment variable. The AT commands are
> > hard coded and there are no plans to leave it to users to figure out.
>
> I actually converted NM_SERIAL_DEBUG into an environment variable about
> 2 weeks ago or something.  No longer need to ask uses to rebuild, but
> can simply
>
> NM_SERIAL_DEBUG=1 /usr/sbin/NetworkManager --no-daemon
>
> and have them test out and report results.
>
> Dan
Hi,

I am having a similar issue on my Dell Latitude E6500 which has a Broadcom 5530 buildin hsdpa minicard. This device gives an ERROR when sent an ATZ command. Using a chat script or wvdial with a cusomized wvdial.conf file which leaves out the ATZ command, the modem works flawlessly. When using NetworkManager however it does not. Here is the trace from NetworkManager DEBUG:

NetworkManager: <info>  Activation (ttyACM0) starting connection 'Vodacom'
NetworkManager: <info>  (ttyACM0): device state change: 3 -> 4
NetworkManager: <info>  Activation (ttyACM0) Stage 1 of 5 (Device Prepare) scheduled...
NetworkManager: <info>  Activation (ttyACM0) Stage 1 of 5 (Device Prepare) started...
NetworkManager: <debug> [1224572376.061516] nm_serial_device_open(): (ttyACM0) opening device...
NetworkManager: <info>  Activation (ttyACM0) Stage 1 of 5 (Device Prepare) complete.
NetworkManager: <debug> [1224572376.169089] nm_serial_debug(): Sending: 'ATZ E0 V1 X4 &C1 +FCLASS=0
'
NetworkManager: <debug> [1224572376.196931] nm_serial_debug(): Got: 'ATZ E0 V1 X4 &C1 +FCLASS=0
'
NetworkManager: <debug> [1224572376.246578] nm_serial_debug(): Got: 'ATZ E0 V1 X4 &C1 +FCLASS=0


ERROR

'
NetworkManager: <WARN>  init_done(): Modem initialization failed
NetworkManager: <info>  (ttyACM0): device state change: 4 -> 9
NetworkManager: <debug> [1224572376.247018] nm_serial_device_close(): Closing device 'ttyACM0'
NetworkManager: <info>  Marking connection 'Vodacom' invalid.
NetworkManager: <info>  Activation (ttyACM0) failed.
NetworkManager: <info>  (ttyACM0): device state change: 9 -> 3
NetworkManager: <info>  (ttyACM0): deactivating device (reason: 0).


As you can see, the ATZ gives an ERROR. Is there some work around to fix this?

Thanks
Craig

To read FirstRand Bank's Disclaimer for this email click on the following address or copy into your Internet browser:
https://www.fnb.co.za/disclaimer.html

If you are unable to access the Disclaimer, send a blank e-mail to firstrandbankdisclaimer fnb co za and we will send you a copy of the Disclaimer.