- if you see [ 2.261416] rtc rtc0: invalid alarm value: 1900-1-29 1193038:40:16 when checking the kernel-log
- unbind the rtc-driver echo 0-0030 > /sys/bus/i2c/devices/0-0030/driver/unbind - issue a reboot reboot - after reboot check again for [ 2.261416] rtc rtc0: invalid alarm value: 1900-1-29 1193038:40:16 ... it should be gone!!! ... if not start from the beginning ! - if the error message is gone you should be able to power the machine down now poweroff - powerdown will work normal again until the alarm is set wrong again Manuel