On Sun, 6 Apr 2014, Christophe Devine wrote: Hi Christophe, yes, I tracked it down to the charging code. I think it comes from the fact, that layer1 is periodically polled by layer23 (mobile) about the current battery-status. And there seems to be a problem with queueing these things over the serial line. So if battery-status is polled and other things are going through serial at the same time, layer1 crashes eventually. Thats my interpretation, but fact is, if you revert the patch attached to the mail, the crashes are gone, but you can't charge. :) I modified the mobile battery, removing the battery itself, and replacing it with a 3.7V AC-Adapter, so that I don't need the charging. Maybe you can investigate it in more detail? Or better I send it to the list too, so the problem could be discussed in the big round again. Best Tim