Re: Dialling failing with PPP timeout

[Dan Williams <dcbw redhat com>]

On Thu, 2009-06-18 at 16:40 +0100, Rick Jones wrote:
> I get persistent failure to connect with Mobile Broadband, and this
> seems to be a PPP timeout. Usually after a few retries it will work,
> and I suspect NM is timing out too soon, and not giving PPP time to
> get connected.
> 
> Typical failure case in daemon.log is:
> 
> Jun 18 16:28:54  <info>  (ttyUSB2): device state change: 5 -> 6 
> Jun 18 16:28:54  <info>  (ttyUSB2): device state change: 6 -> 7 
> Jun 18 16:29:08  <WARN>  pppd_timed_out(): Looks like pppd didn't
> initialize our dbus module 
> Jun 18 16:29:08  <info>  (ttyUSB2): device state change: 7 -> 9 
> 
> The timeout is 15 secs. Sometimes a good connection can take nearly
> this long, so I think if there were more time there would be fewer
> failures.
> 
> Where is this timeout set? Is it in pppd - if so is there a setting
> in /etc/ppp/options to tweak it - or is it set by NM? I'd really llike
> to be able to try increasing this.

It's in NetworkManager itself, actually.  I don't really have a problem
with increasing that timeout to 20 seconds or so.  But beyond that, I'd
be *very* surprised if it would work reliably, since it would indicate
problems on the provider's network or the card itself in setting up the
GPRS data session.

Dan


> Log of a successful connection, for completeness:
> 
> Jun 18 15:40:52  <info>  (ttyUSB2): device state change: 5 -> 6 
> Jun 18 15:40:52  <info>  (ttyUSB2): device state change: 6 -> 7 
> Jun 18 15:40:53  <info>  PPP manager(IP Config Get) reply received. 
> Jun 18 15:40:53  <info>  Activation (ttyUSB2) Stage 4 of 5 (IP
> Configure Get) scheduled... 
> Jun 18 15:40:53  <info>  Activation (ttyUSB2) Stage 4 of 5 (IP
> Configure Get) started... 
> Jun 18 15:40:53  <info>  Activation (ttyUSB2) Stage 5 of 5 (IP
> Configure Commit) scheduled... 
> Jun 18 15:40:53  <info>  Activation (ttyUSB2) Stage 4 of 5 (IP
> Configure Get) complete. 
> Jun 18 15:40:53  <info>  Activation (ttyUSB2) Stage 5 of 5 (IP
> Configure Commit) started... 
> Jun 18 15:40:54  <info>  (ttyUSB2): device state change: 7 -> 8 
> 
> Thanks
> Rick Jones 
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