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So I have this problem, have Windows 7 and Xubuntu 16.04, dual boot screws time in Windows, tried to change /etc/default/rcS as stated in other posts, but UTC = yes line does not appear in that file, never mind, I create the line anyway and set it as stated in those posts, but still when I log into Windows time is wrong again...

Can anyone offer some help?

MadMike
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Halo
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  • how is time "screwed"? Shows an hour more, an hour less or what? Read the comments on this answer, please. (I'm sure that you'll find solution there) http://askubuntu.com/a/521177/332981 – gogeccc Jun 03 '16 at 12:25
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    I'm from Spain, so it should be UTC+1, in Ubuntu it shows the time correctly (for example, 14:00) and then when I go back to Windows it shows 2 hour less (so, for example, 12:00). I'll check it. Thanks a lot. – Halo Jun 03 '16 at 12:30
  • See my answer for 16.04 – muru Jun 03 '16 at 14:02

2 Answers2

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As stated in one comment to this answer:

What you need to make sure, that all system you are using are using same setting. Either local time or UTC time. Windows by default uses local time. So if you tweak Ubuntu to local, both systems are in sync and problem should be gone.

Community
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gogeccc
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  • Ubuntu is already set to local, because I wrote the line UTC = no (although it did not exist). If Windows is using local time and Ubuntu too, it should be gone, but it isn't. That's the main problem. – Halo Jun 03 '16 at 12:32
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    It's better to make Windows use UTC since UTC on system clock is more sane. The only "reason" Windows uses it is for backward compatibility and "for those who set time through BIOS" –  Jun 03 '16 at 12:47
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UTC=yes is no longer used in /etc/default/rcS. See man 5 rcS. it says:

The EDITMOTD, RAMRUN and UTC variables are no longer used. The UTC setting is replaced by the UTC or LOCAL setting in /etc/adjtime, and should have been migrated automatically. See hwclock(5) and hwclock(8) for further details on configuring the system clock.

Jean-Marie
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