From your desktop, notebook, or whatever: flasher-3.5 --set-rd-flags=force-power-key Problem solved. /Estel // edit In case You're wondering, it isn't reflash - it just set r&d flag (not even full r&d mode) to always return bootreason as pwr_key. As side effect, reboot->shutdown problem is fixed.
rhm9bw@domp:/var/lib/vdr$ sudo flasher-3.5 --query-rd-mode flasher v2.5.2 (Oct 21 2009) USB device found found at bus 001, device address 069. Found device RX-51, hardware revision 2101 NOLO version 1.4.14 Version of 'sw-release': RX-51_2009SE_21.2011.38-1_PR_MR0 The device is in R&D mode R&D flags (0x0100): force-power-key