Opened 16 years ago
Last modified 15 years ago
#2107 new enhancement
Feature request: Predefined absolute time for Guest
| Reported by: | A20_user | Owned by: | |
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| Component: | VMM | Version: | VirtualBox 2.0.0 |
| Keywords: | absolute time | Cc: | |
| Guest type: | Windows | Host type: | Windows |
Description
Please add an option to set Guest time to a fixed value at startup. This is a feature for repeatable software tests.
Change History (5)
comment:1 by , 16 years ago
| Summary: | Predefined absolute time for Guest → Feature request: Predefined absolute time for Guest |
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comment:2 by , 16 years ago
comment:3 by , 16 years ago
The biossystemtimeoffset is an inconvenient but possible workaround. It requires to compute a new offset before every start.
comment:4 by , 15 years ago
See topic Data in guest and host for a background discussion. ghr pointed out that installing GA cancels out any biossystemtimeoffset parameter setting. Looking at the code for vboxadd-timesync.c and VBoxDev.cpp, the vmmdevTimesyncBackdoorRead just picks up host system time without applying the time offset stored in the BIOS. This isn't a feature enhancement. Surely this is a bug.
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There is a -biossystemtimeoffset option in VBoxManage that should do the trick too.