Debug potential kernel panic

[Ronny Nilsson]

Hi
Irritating issue. Strange I haven't seen it. I use FTDI dongles all the 
time...

If you want reset in the event of a kernel panic I think there is an kernel 
conf options to specifically force it.

/Ronny




------------------------------------------
> Hi Ronny,
>
> I guess I've found the reason for the Kernel problem:
> https://github.com/raspberrypi/linux/issues/40
>
> In between I've recognized that the watchdog quite reliably resets the Pi
> in case of a panic, so I can live with it for now...
>
> BR,
> Manuel
>
> -----Original Message-----
> From: nard-bounces at arbetsmyra.dyndns.org
> [mailto:nard-bounces at arbetsmyra.dyndns.org] On Behalf Of Ronny Nilsson
> Sent: Donnerstag, 12. November 2015 21:33
> To: Nard SDK mailing list
> Subject: Re: Debug potential kernel panic
>
> Hi
> Are you sure it halts? or is it a reboot? It's a known problem with old Pi
> models that it can happen due to a dip in power when hotpluging some USB
> peripherals. Try adding an externaly powered USB-HUB in between the Pi and
> your serial converter and se if it helps. I think the model B+ is less
> sensitive than model B.
>
> /Ronny
>
>
>
> --------------------------------------------------------------
>
> > Hi,
> >
> > Every time I connect a USB2Serial converter (FTDI 232) my Pi halts. I
> > assume a kernel panic is the reason for that, but I have no "evidence"
> > yet, neither do I have an idea why that's the case. When booting the Pi
> > with the device connected the device gets initialized correctly, only
> > hot-plug seems to be a problem.
> >
> > Long story short: how can I retrieve a kernel dump/log/error message? I
> > thought about kdump, but maybe there are simpler ways to do so...
> >
> > Thanks,
> > Manuel