Cannot Start VM After Moving From 4.3.30 to 5.0.4

[Stewart Berman]

Host: Windows 8.1 Pro x64 on a Surface Pro 3 512GB Gurest: Windows 8 x64

I have a number of VMs that I use as base machines. That is when I have to test something in a specific environment I clone the machine.

To avoid having a huge delay in using one when I need it I periodically start each one and apply Windows Updates.

I recently upgraded my VirtualBox from 4.3.30 to 5.0.4.

I was able to update most of my test VMs including a Windows 8 x64 machine. However, when I tried to start another Windows 8 x64 VM I got: Failed to open a session for the virtual machine <VM Name>.

Configuration error: TM setting &quot;MaybeUseOffsettedHostTSC&quot; is no longer supported. Use the &quot;Mode&quot; setting instead. (VERR_CFGM_CONFIG_UNKNOWN_VALUE).

Result Code: E_FAIL (0x80004005) Component: ConsoleWrap Interface: IConsole {872da645-4a9b-1727-bee2-5585105b9eed}

The above is not very informative. I don't know why the setting was needed and I have no idea how to replace it. I cannot find any reference to it in the documentation.

[Perry G]

I suspect something to do with paravirtualization interface settings but I don't see a log file to be able to verify.

[Stewart Berman]

Machine Log File

[Stewart Berman]

Machine Description

[Stewart Berman]

Have attached machine log file and machine definition.

[Frank Mehnert]

Please do

VBoxManage setextradata W8PX64PROD VBoxInternal/TM/MaybeUseOffsettedHostTSC

to remove the setting which is no longer supported with VBox 5.0.

[Stewart Berman]

Replying to frank:

Please do

VBoxManage setextradata W8PX64PROD VBoxInternal/TM/MaybeUseOffsettedHostTSC

to remove the setting which is no longer supported with VBox 5.0.

What did the setting do under VBox 4.0 and what is the replacement for the setting under VBox 5.0?

[Frank Mehnert]

This is a non-standard setting so you must have set it yourself and I wonder why you are asking this question. This setting was replaced by TSCMode which can have the values VirtTSCEmulated, RealTSCOffset and Dynamic.

I wouldn't explain anything else right now unless you explain why you need this setting. The timing was improved with VBox 5.0 so the first step is to remove the old setting and try with the 5.0 default setting. Enabling the Hyper-V paravirt extension for the Windows 8 guest might help as well.