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Date:      Fri, 14 Sep 2007 14:11:30 +0200
From:      "Attilio Rao" <attilio@freebsd.org>
To:        "Mario Sergio Fujikawa Ferreira" <lioux-list@uol.com.br>
Cc:        freebsd-current@freebsd.org
Subject:   Re: hang on startx with nvidia / also with emu10kx
Message-ID:  <3bbf2fe10709140511p5462d638t5bdb608c7afff1da@mail.gmail.com>
In-Reply-To: <20070914024239.84366.qmail@exxodus.fedaykin.here>
References:  <20070914024239.84366.qmail@exxodus.fedaykin.here>

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2007/9/14, Mario Sergio Fujikawa Ferreira <lioux-list@uol.com.br>:
> Hi,
>
> FreeBSD exxodus.fedaykin.here 7.0-CURRENT FreeBSD 7.0-CURRENT #9: Thu Sep 13 22:46:14 BRT 2007     lioux@exxodus:/usr/src/sys/i386/compile/LIOUX  i386
>
>         -CURRENT as of today September 13th 2007 with latest ports.
> xorg works fine if I launch it with tightvnc. However, the system
> hangs if I try to startx using the nvidia driver. The same happens
> if I try to kldload emu10kx.
>
>         How do I force the system to issue a kernel dump when it
> hangs? I want to be able to provide a proper backtrace of the system
> if possible. :)

Please recompile the kernel with all the debugging options on (with
KDB, DDB, INVARIANTS, INVARIANT_SUPPORT, WITNESS, and without
WITNESS_SKIPSPIN, KDB_UNATTENDED).
Then, when your kernel hangs, just press ctrl+alt+esc and you should
break in ddb.
At that point it would be useful to have informations about following commands:
- ps
- show alllocks
- the backtrace of any thread (you can get it only switching to its
stack frame and doing a 'bt')

Thanks,
Attilio


-- 
Peace can only be achieved by understanding - A. Einstein



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