Problems with pppd

ejc eric.j.christeson at
Fri Feb 3 10:29:39 PST 2006

On 2/2/06, YONETANI Tomokazu <qhwt+dfly at xxxxxxxxxx> wrote:
> On Tue, Jan 31, 2006 at 09:24:59PM -0600, ejc wrote:
> > I got a dump thanks to your excellent instructions.  It didn't tell me
> > much, but I saved it and uploaded kernel.0.gz and vmcore.0.gz to
> >
> Though my laptop has an RJ-11 port, I have no idea how I can make this
> on-chip modem work.  I need to find a real modem before I can dig in
> further.  In the meantime I looked at your kernel dump, and I think
> (IIUC) ppp driver has a serializer problem.  Can you try a kernel with
> the following options enabled(seems it's commented out now):
>   options INVARIANTS
> and run the following command(as root) before running pppd and ping:
>   sysctl debug.trace_on_panic=1 debug.debugger_on_panic=1
> if my guess is right, you'll see a panic in lwkt_serialize_enter()
> (but it may be far before you run the ping command...).

I did this last night and have uploaded the files to

Out of curiosity, how does one view the coredump file and get stack
traces from it?
Thanks for your time and patience.


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