VirtualBox

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Ticket Resolution Summary Owner Reporter
#19605 fixed Add support for Nested Virtualization for Intel VT-x. stl0hello
Description

Currently, Nested Virtualization is not support on Intel platform. The most of Intel users hope that this feature to come true in the future release of VirtualBox.

#19603 fixed Serial communication through host device hangs guest since 6.1.8 eomanis
Description

Host: Arch Linux, Kernel 5.6.13-arch1-1 x86_64

Guest: Windows XP SP3

The guest has a virtual serial port that is passed through to the host's physical serial port /dev/ttyS0. In the guest, a legacy application communicates through this virtual serial port. In particular, it retrieves data from an external device; this data transfer usually lasts about 1 minute.

With VirtualBox 6.1.8 installed on the host, and the VirtualBox Guest Additions 6.1.8 installed on the guest, the guest VM freezes a few seconds into the data transfer.

The guest window menu is still responsive, but trying to hard-close the guest using the menu with File -> Close... has no effect (the "Close Virtual Machine" dialog does not show). The hung guest machine can however be closed with SIGTERM.

With VirtualBox 6.1.6 on the host, and the VirtualBox Guest Additions 6.1.6 on the guest, the serial data transfer works as expected.

#19600 invalid Issue with using an AC97 driver compiled from sample code Zero3K10
Description

I am having an issue regarding it. The issue is that its not playing any audio (or instead plays a short static noise) in a Windows Server 2003 VM ran using VirtualBox with the type of sound card being emulated set to AC97. The debug logs are attached. I used WinDbg to make them.

The source code and the driver (which is Windows Server 2003 compatible) can be found in the archives that are also attached located at https://u.teknik.io/LSzJD.zip. There is a forum post at https://community.osr.com/discussion/229163/doubt-in-sample-code-for-wavert-audio-driver-in-ac97-audio-device-in-win-ddk that might help with fixing it. The desired behavior I want is that audio (such as the Windows Starup Jingle) should be playing in a Windows 7/Windows Server 2003 VM when using the driver that I linked to.

To replicate the issue, do the following:

  1. Make a Windows 7 (32-bit) VM using VirtualBox with the audio device set to ICH97.
  2. Run the VM.
  3. Download the attached driver and extract it somewhere while in the VM.
  4. Open Device Manager and update the AC97 sound card with the driver that you extracted somewhere.
  5. Reboot the VM.
  6. Try to play any of the audio files located in C:\Windows\Media.
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