XP with BIOS clock set to UTC?

Discussion in 'Windows XP General' started by 46kmz5j02, Oct 3, 2006.

  1. 46kmz5j02

    46kmz5j02 Guest

    I have a dual-boot system, running XP Pro and Debian linux.
    After switching from the Debian stable release ("sarge") to the
    testing version ("etch"), I kept seeing a message on linux boot
    about "Superblock last write time is in the future. Fix? yes".

    The boot proceeds normally after that, but I don't like
    inexplicable error messages, so I did some searching on the net.
    Apparently, it had something to do with my bios clock being set
    to local time, rather than UTC. The recommended "fix" was to
    set the bios clock to UTC, which I did. However, when running
    XP, my system clock will periodically reset itself to the
    hardware clock, and the time jumps ahead four hours.

    I found some articles about a registry key called
    "RealTimeIsUniversal", and I tried that, but it didn't help. I
    disabled the Windows Time Service, since I use a third-party
    application to synchronize my system clock to 0.us.pool.ntp.org
    a few times per day, but something is still resetting the system
    time to the bios clock every so often.

    Is there a way I can get these two operating systems to agree on
    how to set a clock?
    46kmz5j02, Oct 3, 2006
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  2. 46kmz5j02

    Malke Guest

    No. This is a known issue when dual-booting Windows and Linux.
    Basically, you need to decide which OS will get adjusted. Windows uses
    Local Time and *nix uses UTC. If you set everything to Local Time, then
    twice a year (assuming you live somewhere that uses DST) you will need
    to manually adjust your Linux time. If you set everything to UTC, then
    Windows will be off.

    On the only machine on which I dual-boot (XP and SUSE 10.1) I have
    everything set to UTC because I almost never boot into Windows. If you
    use Windows regularly on the dual-booting machine, you should use Local
    Time and deal with the time issues in Etch the way you have.

    Sorry there isn't an easier way, but there you have it. I suppose you
    could get around it by scrapping the dual-boot and just installing
    Windows in Sarge under VMWare (assuming the box has enough RAM).

    Malke, Oct 3, 2006
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  3. 46kmz5j02

    Guest Guest

    I've always had my BIOS clock set to local time, and in this case Windows is
    happy. Then I just adjusted the clock settings for my Linux installation. I
    don't use Debian (I use Ubuntu/Kubuntu which is based on Debian) so I'm not
    familiar with this error.

    If you want to use UTC time however, you'll have disable Windows from
    automatically synchronizing it's time. Double click on the System Clock, go
    to Internet Time, and uncheck the Automatically Synchronize box. You may also
    have to set the time zone to Greenwich Mean Time also.

    Guest, Oct 3, 2006
  4. 46kmz5j02

    Rock Guest

    Would you please quote at least a portion of the message to which you
    respond. Otherwise your posts are out of context. You might not realize
    it, since you're using the web interface (which btw is clunky and basically
    awful) that this is a newsgroup, not a forum or board. Many people access
    it using a newsreader and only download the latest messages so we don't see
    the other messages in the thread. Thanks.
    Rock, Oct 3, 2006
  5. 46kmz5j02

    Guest Guest

    Sure, sorry about that, I didn't realize it. Thanks for pointing it out.

    I do dislike the web interface, so maybe I'll give a newsreader a shot.

    Guest, Oct 4, 2006
  6. 46kmz5j02

    Rock Guest

    Great. XP comes with Outlook Express. Here is a link for setting up OE for
    Rock, Oct 4, 2006
  7. 46kmz5j02


    Aug 29, 2018
    Likes Received:
    See a solution at https://askubuntu.com/a/169384:

    Add in the registry below


    the key-value-pair

    RealTimeIsUniversal = (dword) 1
    bodi, Aug 29, 2018
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