USB camera causing OS crash?

[Mark Ovens]

Julian Elischer wrote:
> 
> Mark Ovens wrote:
> 
>> Canon Powershot A70
>>
>> FreeBSD redshift 5.3-STABLE FreeBSD 5.3-STABLE #0: Sat Jan  1 18:37:13 
>> GMT 2005     mark at redshift:/usr/obj/usr/src/sys/REDSHIFT  i386
>>
>> ugen1: Canon Inc. Canon Digital Camera, rev 1.10/0.01, addr 2
>>
>> This camera used to work just fine in digikam but now doesn't (can't 
>> say exactly when it stopped though). Keep getting "Can't connect to 
>> camera" error when trying to open the camera although digikam does 
>> auto-detect it.
>>
>> Googling threw up some info at 
>> http://gphoto.org/doc/manual/permissions-usb.html about allowing USB 
>> devices to be accessed by non-root users (section 4.3.3.1. FreeBSD 5.x 
>> near the bottom of the page) which says to add the following to 
>> /etc/rc.local:
>>
>> /sbin/devfs ruleset 10
>> /sbin/devfs rule applyset
>> /sbin/devfs rule add path ugen1* mode 666
>> /sbin/devfs rule show
>>
>> I've done that, but now instead of "Can't connect to camera" the 
>> computer locks up and after about 10 seconds reboots - all the 
>> filesystems are reported as not being properly dismounted on reboot. 
>> Nothing is written to any logs (obviously) so I can't provide any info. 
> 
> 
> you probably need to run with ddb, kdb and a serial console, or at least 
> from the console, outside of
> X11 so you can see the error messages. The system will not go int ddb if 
> the console is being controlled by X11.
> 

I guess I can't do that then as I don't have serial console and can only 
force the crash from within X - and there's no time to switch back to 
the console before it hangs.

Regards,

Mark