Opened 4 years ago

Last modified 4 years ago

#19480 new defect

VirtualBox freezes when Windows 7/10 guests reboot/reset after restoring online snapshots if GA is installed

Reported by: wzyboy Owned by:
Component: guest additions Version: VirtualBox 6.1.4
Keywords: guest addition Cc:
Guest type: Windows Host type: Linux


Host information:

  • Arch Linux
  • linux 5.6.3.arch1-1
  • virtualbox 6.1.4-6
  • virtualbox-guest-iso 6.1.4-1

Guest Information (both are reproducible)

  • Windows 7 SP1
  • Windows 10 LTSC 2019, Build Number 17763.1131

Steps to reproduce:

  1. Cold boot the guest VM;
  2. Take a online snapshot "Snapshot 1";
  3. Shutdown the machine and restore to "Snapshot 1";
  4. Boot the guest VM from "Snapshot 1" (directly into the Windows desktop);
  5. Reboot/Reset the guest VM;
  6. The VM resets, and shows a brief Windows Vista-style loading progress bar, and the VirtualBox (on host machine) freezes before crashing.


  • I have tried Windows 7 and Windows 10 guests (as decribed above), both are reproducible.
  • If Guest Addition is not installed / uninstalled, the bug does not occur.
  • If guest VM is cold booted (e.g. after step 4, instead of resetting/rebooting it, just shutdown and boot it), the bug does not occur.

Side note (may not relate to this bug):

After VB freezes/crashes, the RAM for guest VM is simply "taken away" from the host and cannot be recovered without a reboot of the host -- My host has 32 GB RAM, and each time a guest with 4 GB RAM crashes, there are 4 GB of RAM taken away from the host. After 7 crashes, 28 GB RAM are taken away from the host. I tried to shutdown Xorg server and there are only a few running processes left (none of them are VirtualBox), the host system still reports there are ~30 GB RAM used (top, htop, free... not cache/buffer, just "used"). I have to reboot the host system to recover the RAM.

Attachments (1)

Win7.log (99.1 KB ) - added by wzyboy 4 years ago.

Download all attachments as: .zip

Change History (2)

by wzyboy, 4 years ago

Attachment: Win7.log added

comment:1 by wzyboy, 4 years ago

I tested these versions of VBoxGuestAdditions_X.X.X.iso with VirtualBox 6.1.4:

  • 5.2.38
  • 6.0.0
  • 6.0.4
  • 6.0.12
  • 6.1.4

Only with GA 5.2.38 the bug does not occur. It seems to me that the bug was introduced with GA 6.0.0.

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