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Hello,

We're glad to announce a new Alpha version 9.0.9000.0 of our XCP-ng Windows PV Drivers for Windows 10 1607 or newer, and Windows Server 2016 or newer. Note: this driver release is for testing purposes only. Not for production use!

The release includes new 9.1-series drivers from Xen Project with new features and stability improvements. We also included a XenClean tool for cleanly removing any existing Xen PV drivers, whether they are installed via XCP-ng, Citrix or Windows Update. Feel free to give it a try!

We're looking to finalize the drivers and produce a signed, Windows-ready installation package. Your feedback will help us greatly in reaching this goal.

You'll find the new release on XCP-ng GitHub. Below are the release notes:

Before Installing

• This driver release is for testing purposes only. Not for production use!
• Make backups/snapshots before installing!
• The drivers in this package are testsigned and require enabling testsigning mode. Disable Secure Boot, then run the included script testsign/install.ps1 as Administrator to configure Windows and install the necessary signer certificates. Your VM will reboot automatically.
• If you encounter installation/uninstallation errors, please try again with one of the following commands:

For installing:
msiexec.exe /i XenDrivers-x64.msi /l*vx install.log

For uninstalling:
msiexec.exe /x XenDrivers-x64.msi /l*vx uninstall.log

Please include this log along with the file C:\Windows\INF\setupapi.dev.log in your bug report. These files will help us troubleshoot any installation issues.

Changes since 8.2.2-beta

• This release is based on upstream 9.1-series drivers, which includes the PV Mouse/Keyboard driver and PV Console Driver. You can access the PV console with the following command from a XCP-ng host:

xl console -t pv <vmname>

• New installer with clean uninstallation and multiple install/uninstall safety checks.
• New XenClean utility for cleanly removing XCP-ng and Citrix drivers.
• Multiple driver stability fixes.
• Volume Shadow Service Provider is no longer included. (XCP-ng 8.1 and newer no longer support quiescent snapshots)
• Management Agent is currently not included. Xen Orchestra may show "Management agent not detected", but shutdown and reboot features will work normally. We're looking to bring back features of the management agent in the next releases.

Help / Community Support

Please report any errors or BSOD you encounter during testing of this release. Your feedback is very appreciated.

@manilx You can use the XenClean tool from our 9.0.9000 driver release: https://github.com/xcp-ng/win-pv-drivers/releases/tag/v9.0.9000.0

Just go into package\XenClean\x64 and run Invoke-XenClean.ps1 as admin, it will remove all existing drivers and automatically reboot.
Afterwards you can install the Citrix 9.4.0 tools.

Note: Please make sure to take a snapshot before running the tool.

You simply install the XenServer tools as usual, making sure to disable driver installing and auto-updating in the setup wizard:

It's a known issue with the new Citrix drivers: https://support.citrix.com/s/article/CTX235403-updates-to-xenserver-vm-tools-for-windows-for-xenserver-and-citrix-hypervisor?language=en_US

It shouldn't happen again in future updates.

If you use the Windows Update option, then you still need to install XenServer VM tools to provide the management agent.
If the 8.2 XCP-ng tools work for you, feel free to continue using it; however, if you want the newest fixes you should use XenServer VM Tools 9.4.0.
In any case, you should keep the "Manage Citrix PV drivers" option disabled and let the installer manage its drivers.

It looks like the GeoVision dongle's driver is failing somehow. Could you open the crash dump with Windbg, run the command !analyze -v and post its output?

After some testing, I've found that running any service that creates a form (of which Xen management agent is one) will trigger the issue. This points to an issue in Windows Server itself rather than the Xen guest agent.

I've created a thread on Microsoft Community to keep track of the issue: https://answers.microsoft.com/en-us/windowserver/forum/server_performance-servertop_application/creating-an-ui-autostart-service-on-a-server-2025/c2ced91b-21c2-49c1-86a6-24b90dc72c6d. In the meantime, please use @Greg_E's method of setting the Xen management agent service to delayed start to work around this issue.

I'm investigating further.

The latest WS2025 patches fixed the issue for me.