Hi everyone,
I'm experiencing a strange issue. When I start any VM, VirtualBox initially sets the VM's RTC clock two days behind the current local host datetime. Could this be a bug? Is there a workaround?
- Host OS: Fedora Workstation 27 64-bit (Kernel 4.14.8 )
- VirtualBox: 5.1.30 (RPM Fusion build)
- Guest: Any (guest additions not relevant in this issue)
Attached:
- Screenshot of host date and time
- Screenshot of RTC date and time on VM startup
- VM log
BTW happy new year to all!
Guest RTC clock always two days behind host on VM startup
Guest RTC clock always two days behind host on VM startup
- Attachments
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- VBox.log
- VM log
- (87.01 KiB) Downloaded 9 times
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- Screenshot of RTC date and time on VM startup
- Screenshot from 2018-01-02 06-06-09.png (18.9 KiB) Viewed 2168 times
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- Screenshot of host date and time
- Screenshot from 2018-01-02 06-05-25.png (11.21 KiB) Viewed 2168 times
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- Site Moderator
- Posts: 27329
- Joined: 22. Oct 2010, 11:03
- Primary OS: Mac OS X other
- VBox Version: PUEL
- Guest OSses: Win(*>98), Linux*, OSX>10.5
- Location: Greece
Re: Guest RTC clock always two days behind host on VM startup
This doesn't look right at all. Could you elaborate?00:00:01.023848 Guest OS type: 'WindowsXP' 00:00:01.094905 File system of '/home/jonah/Downloads/Microsoft MS-DOS 6.22 Plus Enhanced Tools (3.5)/Disk1.img' (Floppy) is ext4
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Do NOT reply with the "QUOTE" button, please use the "POST REPLY", at the bottom of the form.
If you obfuscate any information requested, I will obfuscate my response. These are virtual UUIDs, not real ones.
Re: Guest RTC clock always two days behind host on VM startup
Oh sorry about that, I temporarily booted the VM with a MS-DOS floppy disk image to troubleshoot this. The issue is the same when I boot to Windows XP.
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- Posts: 16
- Joined: 5. Jul 2013, 00:15
- Primary OS: Other
- VBox Version: OSE Fedora
- Guest OSses: linux
Re: Guest RTC clock always two days behind host on VM startup
That sounds like your hardware clock is off by two days.
Re: Guest RTC clock always two days behind host on VM startup
Exactly what I thought but then I did more testing. I think I've discovered a corner case bug.rpyne wrote:That sounds like your hardware clock is off by two days.
The issue seemingly "resolved itself" -- I could not replicate it. So I set the hardware clock via BIOS Setup to 01/01/2018 15:00:00 (Linux takes that as UTC) and the bug reveals itself nicely! My guess is it's a date calculation bug that crops up only around new year?
Updated screenshots attached. Note that internet is disabled and guest additions are not installed, to ensure what we see is the date and time VirtualBox sets the VM to on startup.
- Attachments
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- VBox.log
- VM log
- (88.74 KiB) Downloaded 5 times
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- Windows XP VM showing date and time as set by VirtualBox on startup.
- Screenshot from 2018-01-02 04-12-01b.jpg (83.21 KiB) Viewed 2150 times
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- Date and time set in BIOS
- 20180102_161346_resized_b.jpg (87.99 KiB) Viewed 2150 times