Let's first recap from the other thread :     And here is Zador's first reply :     And my first reply :     Now, here is my latest investigations :   Both H5 and A64 doesn't probe RTC driver successfully, explaining why dmesg doesn't mentioned it (I hate driver which are not verbose on failures !) But, why H5 doesn't react the same as A64 ? I will have to wait until issue re-appear to dig further in /var/log/syslog , maybe tomorrow !   BTW, Zador, the -EINVAL seen on "date" co