kern/129846: [panic] /usr/sbin/ppp causes panic "Sleeping thread owns a non-sleepable lock

[Robert Watson]

On Tue, 10 Mar 2009, Richard Tector wrote:

> Just a me too on 7.1-STABLE amd64 (as of 2009-03-05 at least). Note this 
> does not happen with a 7.1-RELEASE kernel, so I'm assuming it's not 
> userland.

This problem is believed fixed as of r189531, committed 8 March -- could you 
try updating and see if that helps?  A more complete description of the 
problem can be found here:

   http://www.freebsd.org/cgi/query-pr.cgi?pr=132222

Robert N M Watson
Computer Laboratory
University of Cambridge