How to provide useful debug info

Bob Bishop rb at
Wed Jul 23 06:36:18 PDT 2003


Generally the minimum required information is /var/run/dmesg.boot and a 
stack backtrace at the crash.

particularly 17.4 and 17.5

At 13:13 23/7/03, Harald Schmalzbauer wrote:
>Hi all,
>I have currently at least 4 scenarios when my 5.1-release crashes on
>different hardware.
>So I built a kernel (GENERIC) with debugging symbols and DDB option.
>Now I'd like to provide usefull info about the following crashes:
>1. booting from degraded RAID1 with HPT372 (machine crashes and I see db>)
>2. crash when unquirked UMASS is unpluged
>3. crash when /stand/sysinstall is called after some uptime
>4. machine hangs when LPT is removed in BIOS and ACPI enabled (no crash, I
>think I have to enter DDB with ctrl-alt-esc?)
>I read the FAQ (18.13.  How can I make the most of the data I see when my
>kernel panics?) but I think this isn't applicable to my crash when the
>machine crashes before rc.conf can be read. And I really don't understand
>what he's talking about :( but perhaps I can help.
>Please tell me if I should do something like "trace" and write it down or
>something like that.

Bob Bishop		    +44 (0)118 977 4017
rb at		fax +44 (0)118 989 4254

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