Le 19/05/2020 à 16:11, Pali Rohár a écrit : > On Tuesday 19 May 2020 13:40:18 FUSTE Emmanuel wrote: >> Le 19/05/2020 à 15:11, Pali Rohár a écrit : >> >>> In past I lot of time seen problem that Windows stored system time in >>> local timezone to RTC, then computer was rebooted to Linux which reads >>> system time from RTC in UTC and saw incorrect time. Installing NTP >>> daemon fixed this problem. And then after reboot Windows time was >>> shifted and after few seconds/minutes it synchronized it again against >>> Windows time server. >> A better workaround: just intruct linux that RTC is in localtimezone and >> not UTC and it would have worked. > I remember that this setup did not work in one case: when linux system > was booted prior booting windows system after DST change. Time was > shifted two times, once by linux, once by windows as windows did not > know that it should do it... > Emmanuel. Yes , the problem of shadow states. Only one could control the RTC, simultaneously (VM) or asynchronously (Multiboot). Your hibernation image is a shadow state too.
Emmanuel.