Re: Trouble accessing USB modems on NetBSD 8.1 x86_64

[mlelstv%serpens.de@localhost (Michael van Elst)]

noloader%gmail.com@localhost (Jeffrey Walton) writes:

>One thing I noticed... I have a modem-dump program that dumps a
>running config. It prints S0 - S36, ATI0 - ATI10, and some settings
>like +FCLASS, +PCW and +VCID.

>I noticed the (vm) machine reboots about two-thirds of the way through
>the modem-dump program. Bright green text is displayed and then a
>reboot. I can't read fast enough to see what is going on...

The command

sysctl -w ddb.onpanic=1

makes the kernel enter the debugger in that situation, so that you can
read the text. You can permanently enable that setting by augmenting
/etc/sysctl.conf with

ddb.onpanic?=1

It's not always possible to write a kernel dump and you need a swap
partition that is large enough. From ddb you can try the command
"sync", but if it doesn't dump automatically it probably won't work
from ddb either.


-- 
-- 
                                Michael van Elst
Internet: mlelstv%serpens.de@localhost
                                "A potential Snark may lurk in every tree."