Time is always wrong

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  1. Posts : 1,784
    Linux Mint 18.2 xfce 64-bit (VMWare host) / Windows 8.1 Pro 32-bit (VMWare guest)
       #11

    I have dual boot Linux / Windows. I discovered an anomaly between Linux and Windows: Whenever I would boot into Linux, then exit Linux and boot into Windows, the time shown in Windows would be five hours off! I found that the cause of this is that Linux uses UTC (Universal Coordinated Time or Greenwich Mean Time) and converts from there to local time, whereas Windows uses local time. Consequently, every time I would go from Linux to Windows, I would see UTC rather than my local time.


    I fixed it by doing a registry edit in Windows:
    • I went into the Windows registry and navigated to here:
      HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\TimeZoneInformation
    • I right-clicked in the right pane and selected New / DWORD (32-bit Value) -- "RealTimeIsUniversal" (without the quotes).
    • I double-clicked on RealTimeIsUniversal and changed the Value from 0 to 1.
    I rebooted into Linux, and then rebooted into Windows. Problem solved!

    After doing this, I discovered that the computer BIOS was showing time in UTC. But that's ok, because both Windows and Linux now show the correct local time.

    There may be something you could do in Linux rather than in Windows to fix this; I did this fix in Windows.
      My Computer


  2. Posts : 21,004
    Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
       #12

    Well I am no expert at all but maybe this will throw some light on it too Jim I am only guessing here because I am not that familiar with Linux stuff

    Dual Boot: Fix Time Differences Between Ubuntu And Windows ~ Web Upd8: Ubuntu / Linux blog
      My Computer


  3. Posts : 1,730
    Windows 10 Pro 64 bit
       #13

    Thank you mrjimphelps and John for helping out BLUE838.
      My Computer


  4. Posts : 9,537
    Windows 7 Home Premium 64bit
       #14

    Had same problem so I replaced the battery on my laptop.
    Works perfectly now.
      My Computer


  5. Posts : 84
    W7PRO
       #15

    My 2¢. It may not be the solution you are looking for, but you might make a Task Scheduler - Time_Synchronization - in Windows to update the clock when you reboot or even at an interval you want. I don't know how to do this in Linux. I create one to update my clock every 4 hours.
    Last edited by J.R.; 14 Sep 2017 at 09:06.
      My Computers


  6. Posts : 31
    Windows 7 64 Home Premium
    Thread Starter
       #16

    mrjimphelps said:
    I have dual boot Linux / Windows. I discovered an anomaly between Linux and Windows: Whenever I would boot into Linux, then exit Linux and boot into Windows, the time shown in Windows would be five hours off! I found that the cause of this is that Linux uses UTC (Universal Coordinated Time or Greenwich Mean Time) and converts from there to local time, whereas Windows uses local time. Consequently, every time I would go from Linux to Windows, I would see UTC rather than my local time.


    I fixed it by doing a registry edit in Windows:
    • I went into the Windows registry and navigated to here:
      HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\TimeZoneInformation
    • I right-clicked in the right pane and selected New / DWORD (32-bit Value) -- "RealTimeIsUniversal" (without the quotes).
    • I double-clicked on RealTimeIsUniversal and changed the Value from 0 to 1.

    I rebooted into Linux, and then rebooted into Windows. Problem solved!

    After doing this, I discovered that the computer BIOS was showing time in UTC. But that's ok, because both Windows and Linux now show the correct local time.

    There may be something you could do in Linux rather than in Windows to fix this; I did this fix in Windows.


    Works! Sorry, im a bit late, i gave up and recently tried this and the clock works now. I can't believe it had something to do with Linux. I would of never figured this out, THANK YOU!
      My Computer


  7. Posts : 21,004
    Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
       #17

    No worries Blue and as with anything Linux and Windows dual boots - I find anyway - the machine can attain soem really quirky habits.
      My Computer


  8. Posts : 82
    windows 7 ultimate 32 bits
       #18

    i have the same problem.But its worse than yours.Not only clock but the date is also incorrect.several times,i corrected it manually.but it became incorrect again.How to fix it.
    thx.
      My Computer


  9. Posts : 9,746
    Windows 7 Home Premium 64 bit sp1
       #19

    qpod25. The most likely cause is a flat CMOS battery located on the motherboard. These are usually a 3 volt 2032 lithium button cell & readily available. The time & the date are stored in the computer's motherboard & this small battery provides power for that while the computer is shut down & when that battery goes flat the time & date are lost & have to be reset.

    This website might help you on how to replace the battery.

    How to Replace the CMOS in a Toshiba Satellite Laptop | Techwalla.com
      My Computer


  10. Posts : 82
    windows 7 ultimate 32 bits
       #20

    if this is hardware related issue then why another laptop of mine (Intel(R) Celerone CPU 540 @ 1.86GHz) Manufacturer Acer 32 bit is showing time differently.Also my laptops used to show time correctly.But only now,i dont know what has happened,that both of my laptops are not showing time correctly.One Laptop is online and other is offline.But both show the same symptoms.
    i synced the clocks withe microsoft internet based servers,which became ok.But the next hour the time again was wrong.
    best wishes.
      My Computer


 
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