thanks for the report, yes I know it may sound weird but I already this discussion in the past and people convinced me to use play/pause (and not OFF) to power on. On the other hand, using anything else than OFF to power off would be weird... Currently there is no lock method because it has no hold key but we have support for a soft-lock mode in Rockbox, but we need to decide which key (or combo) to bind to it. A natural candidate could be long OFF press (short would still be menu and very long still power off), or maybe long back ? Ideas are welcome !