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Troubleshooting Audio and Enhanced Session Mode in Ubuntu VM on Hyper-V

Image of audio waves.

I had previously got Ubuntu 22.04.5 LTS running as a VM in Hyper-V on a Windows 11 machine with Enhanced Session configured properly so that the session window for the Linux instance displayed in the correct resolution. However, there was no audio.

Today, I attempted to troubleshoot the audio issue. Being unable to resolve it, I decided to upgrade to Ubuntu 24.04.3 LTS. This resolved the sound issue but broke the Enhanced Session. I was able to resolve that as well, so now I have Ubuntu 24.04.3 LTS running in Hyper-V with Enhanced Session enabled and audio functioning.

Image of Ubuntu version 24 desktop with Terminal window open.

Here are my notes:

Environment:

  • Host: Windows 11 Pro.
  • Virtualization: Hyper-V.
  • Guest OS: Ubuntu 22.04 (initially), upgraded to Ubuntu 24.04.
  • Access Method: xrdp with Enhanced Session Mode enabled.

Initial Problem – Ubuntu 22.04

Issue: Ubuntu VM had no audio output. Sound settings only showed “Dummy Output” device.

Attempted Solution:
Tried to install PulseAudio modules for xrdp audio redirection:

sudo apt update

sudo apt install pulseaudio pulseaudio-module-xrdp

Result: Package availability errors prevented successful installation. Audio issue remained unresolved.

Decision to Upgrade

Due to persistent package issues in Ubuntu 22.04, decided to perform in-place upgrade to Ubuntu 24.04.

New Problem After Upgrade

Issue: Enhanced Session Mode no longer available after Ubuntu upgrade. VM display reverted to small, fixed resolution window. Previously had working Enhanced Session with adjustable 4K resolution matching 16-inch display.

Solution – Restoring Enhanced Session Mode in Ubuntu 24.04.

Step 1: Install Enhanced Session components in Ubuntu VM.

Downloaded and ran the linux-vm-tools installation script:

cd ~
wget https://raw.githubusercontent.com/Hinara/linux-vm-tools/ubuntu20-04/ubuntu/22.04/install.sh
chmod +x install.sh
sudo ./install.sh

Shut down the VM completely after installation:

sudo shutdown -h now

Step 2: Enable Enhanced Session on Hyper-V host.

On Windows host, opened PowerShell as Administrator and ran (Replace “YourVMName” with actual VM name):

Set-VM -VMName "YourVMName" -EnhancedSessionTransportType HvSocket

Step 3: Start the VM.

Started VM from Hyper-V Manager. Was presented with Enhanced Session connection screen with resolution options.

Result
After completing these steps:

  • Enhanced Session Mode restored and functional
  • 4K resolution working correctly.
  • Audio working without additional configuration (resolved automatically during the process).
  • xrdp login screen presenting properly on connection.

Notes
The upgrade to Ubuntu 24.04 combined with reinstalling Enhanced Session components resolved both the original audio issue and the post-upgrade display issue. The linux-vm-tools script automatically configured xrdp and audio components correctly for Ubuntu 24.04.

InfiniteLoop

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