boatbodger changed the title (ds1307/ds3231) hwclock: ioctl(RTC_RD_TIME) to /dev/rtc0 to read the time failed: Invalid argument (ds1307/ds3231) hwclock: ioctl(3, RTC_UIE_ON, 0): Invalid argument Oct 12, 2019 qjayjayp commented Apr 15, 2021 I had the same error, and for me...