Debug potential kernel panic

Ronny Nilsson rln-nard at
Thu Nov 12 21:32:46 CET 2015

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.


> 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

More information about the Nard mailing list