Date and Time configuration in dual boot configuration

"[email protected]" <[email protected]> Fri, 3 Apr 2026 13:51:52 +0200 (CEST)
Newsgroups gmane.comp.kde.doc
Message-ID <1775217112319.509076.d4039fb1d0bba8f6d4605600ca3cf74a8e39f021@spica.telekom.de>
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Hi,
=20
in dual boot configurations (Linux plus Windows) there can be an issue with=
=20
changing time display.
=20
My new Laptop was delivered with Win 11 and I left it on a minimized=20
partition - you never know, if you need it. In daily usage I use Debian and=
=20
it runs fine. For a check I started up Win 11 and since then Debian/Linux=
=20
is 1 hour in advance (TZ Berlin).
=20
The reason is that Win stores time in local time while Linux stores it in=
=20
UTC. There are 2 options to fix this:
1. apply a registry hack in Win to use UTC
2. change timedatectl in Linux to local.
=20
Option 1. is said to be the favoured solution. Find a better explnation=20
here:
https://ubuntuhandbook.org/index.php/2021/06/incorrect-time-windows-11-dual=
-boot-ubuntu/amp/
=20
I think, it were a good idea to mention this problem in the "Date & Time"=
=20
help.
=20
BR, Stephan

=20

=EF=BB=BF
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; charset=
=3DUTF-8"/><title></title></head><body><p style=3D"margin: 0px 5px 0px 0px;=
 text-indent: 0px;">Hi,</p>
<p style=3D"margin: 0px 5px 0px 0px; text-indent: 0px;"><span style=3D"font=
-family:arial, helvetica, sans-serif;font-size:12pt;color:rgb(0, 0, 0);text=
-decoration:none">&nbsp;</span></p>
<p style=3D"margin: 0px 5px 0px 0px; text-indent: 0px;">in dual boot config=
urations (Linux plus Windows) there can be an issue with changing time disp=
lay.</p>
<p style=3D"margin: 0px 5px 0px 0px; text-indent: 0px;"><span style=3D"font=
-family:arial, helvetica, sans-serif;font-size:12pt;color:rgb(0, 0, 0);text=
-decoration:none">&nbsp;</span></p>
<p style=3D"margin: 0px 5px 0px 0px; text-indent: 0px;">My new Laptop was d=
elivered with Win 11 and I left it on a minimized partition - you never kno=
w, if you need it. In daily usage I use Debian and it runs fine. For a chec=
k I started up Win 11 and since then Debian/Linux is 1 hour in advance (TZ =
Berlin).</p>
<p style=3D"margin: 0px 5px 0px 0px; text-indent: 0px;"><span style=3D"font=
-family:arial, helvetica, sans-serif;font-size:12pt;color:rgb(0, 0, 0);text=
-decoration:none">&nbsp;</span></p>
<p style=3D"margin: 0px 5px 0px 0px; text-indent: 0px;">The reason is that =
Win stores time in local time while Linux stores it in UTC. There are 2 opt=
ions to fix this:</p>
<p style=3D"margin: 0px 5px 0px 0px; text-indent: 0px;">1. apply a registry=
 hack in Win to use UTC</p>
<p style=3D"margin: 0px 5px 0px 0px; text-indent: 0px;">2. change timedatec=
tl in Linux to local.</p>
<p style=3D"margin: 0px 5px 0px 0px; text-indent: 0px;"><span style=3D"font=
-family:arial, helvetica, sans-serif;font-size:12pt;color:rgb(0, 0, 0);text=
-decoration:none">&nbsp;</span></p>
<p style=3D"margin: 0px 5px 0px 0px; text-indent: 0px;">Option 1. is said t=
o be the favoured solution. Find a better explnation here:</p>
<p style=3D"margin: 0px 5px 0px 0px; text-indent: 0px;">https://ubuntuhandb=
ook.org/index.php/2021/06/incorrect-time-windows-11-dual-boot-ubuntu/amp/</=
p>
<p style=3D"margin: 0px 5px 0px 0px; text-indent: 0px;"><span style=3D"font=
-family:arial, helvetica, sans-serif;font-size:12pt;color:rgb(0, 0, 0);text=
-decoration:none">&nbsp;</span></p>
<p style=3D"margin: 0px 5px 0px 0px; text-indent: 0px;">I think, it were a =
good idea to mention this problem in the "Date &amp; Time" help.</p>
<p style=3D"margin: 0px 5px 0px 0px; text-indent: 0px;"><span style=3D"font=
-family:arial, helvetica, sans-serif;font-size:12pt;color:rgb(0, 0, 0);text=
-decoration:none">&nbsp;</span></p>
<p style=3D"margin: 0px 5px 0px 0px; text-indent: 0px;">BR, Stephan</p>
<p><span style=3D"font-family:arial, helvetica, sans-serif;font-size:12pt;c=
olor:rgb(0, 0, 0);text-decoration:none">&nbsp;</span></p>=EF=BB=BF</body></=
html>
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