Restoring snapshot when closing machine: current state marked modified sometimes -> Fixed in SVN

[jmausr]

When shutting down a VM and choosing "restore current snapsot", sometimes (say, once every 5 or 10 times), the current state is kept marked as "(modified)". However the snapshot is restored and the differencing image does reset to a very small size.

It's probably some race condition as I see no correlation between actions and the problem happening. I'm attaching two logs from the same VM; the first one (good.log) worked correctly, the second one (bad.log) exhibited the problem. I doubt the logs show anything unusual though.

[jmausr]

good.log

[jmausr]

bad.log

[Poul Bak]

I can confirm this, the frequency is as you say. Workaround is to use the GUI to revert to snapshot (at least that works for me). Both host and guest are Windows 7 64-bit.

Don't know if this is relevant, I always get lines like this in vboxsvc.log: ERROR [COM]: aRC=VBOX_E_OBJECT_IN_USE (0x80bb000c) aIID={53f9cc0c-e0fd-40a5-a404-a7a5272082cd} aComponent={Medium} aText={Medium 'C:\Vm\Windows 7\Windows 7.vdi' cannot be closed because it is still attached to 1 virtual machines}, preserve=false

[Frank Mehnert]

Should be fixed in VBox 4.1.4, please confirm.

[jmausr]

I've done a bit of testing in 4.1.4 and the problem seems to be gone, thanks!

Since it wasn't 100% reproducible in the first place, I'll let you know if it comes back.

[jmausr]

Unfortunately a new, worse bug has appeared: after restarting the UI(*), all snapshots are marked as "modified" in all VMs. I don't know if it's related or a separate bug should be filed for that.

(*) More specifically, after restarting VBoxSVC, which normally requires quitting for a few seconds.

[Christian Pötzsch]

This is fixed in SVN and the fix will be available with the next minor release.

[Frank Mehnert]

The fix is part of VirtualBox 4.1.6.