Re: Hard hang with u3g and -current

For the archives...

On 2009-Jun-03 17:52:05 +1000, Peter Jeremy <peter_at_server.vk2pj.dyndns.org> wrote:
>I have a Huawei E169 3G modem which I'm using with the u3g driver on
>-current/i386 from about 4 weeks ago on my Aspire One (dual-core
>N270).  If I access the stats port (/dev/cuaD0.2) then the system will
>randomly hang.

I tracked this down to the e169 randomly detaching when the stats port
was open.  I'd previously (accidently) noticed that unplugging the
e169 whilst it was in use would hang my system.  Upgrading to a more
recent -current has fixed the problem - the e169 no longer randomly
detaches and if I accidently pull the e169 out whilst it is in use,
the system no longer hangs.

>Can anyone suggest a way to track this down?  I can't get to DDB, there's
>no serial, firewire, PCcard or similar I/O.

My solution was to enable watchdog(4) - which gave me a panic & crashdump.

-- 
Peter Jeremy