NoVNC guest mouse gone when upgrade pve-qemu-kvm:amd64 .

[ertanerbek]

Hello, when I upgrade the package pve-qemu-kvm:amd64 from 10.0.2-4 to 10.1.2-1, if I use VNC in the guest system’s Display -> Clipboard section, the mouse becomes unusable in the NoVNC console on the guest.

When I downgrade, it works correctly again.

To fix the issue, I tried different display adapters such as Standard VGA, VMware Compatible, and Spice, but the problem persisted. It only gets resolved if I downgrade the package from 10.1.2-1 to 10.0.2-4.

I believe there is a problem in the latest update.

 

[ertanerbek]

For your information: In the latest update, the following packages were upgraded.


Start-Date: 2025-11-11 21:25:38
Commandline: apt-get dist-upgrade
Upgrade: pve-qemu-kvm:amd64 (10.0.2-4, 10.1.2-1), libpve-storage-perl:amd64 (9.0.13, 9.0.14), libpve-common-perl:amd64 (9.0.11, 9.0.13)
End-Date: 2025-11-11 21:26:00

I just downgrade packet and power off anf power on guest then mouse come back

 

[ReluctantSnake]

I have the same issues on NoVNC and Guacamole VNC connections.
Only on Windows VMs with spice-tools installed and Clipboard set to VNC.

Downgrading was the only way to resolve this for me as well.

 

[Unfazed4088]

I ran into this issue too. I discovered there is also a temporary workaround which works on pve-qemu-kvm 10.1.2-1. Go into the Options tab of the VM in PVE and set "Use tablet for pointer" to no, apply it, and then set it back to yes (Do it while the VM is running and all the drivers are loaded). That brings the mouse back until the VM is restarted.

 

[fiona]

Hi,
thank you for the reports! I can reproduce the issue with a Windows 11 guest and will take a look.

EDIT: Upstream already has a fix which was sent to the pve-devel mailing list now too:
https://lore.proxmox.com/pve-devel/20251117114324.113404-1-f.ebner@proxmox.com/T/

 

[ertanerbek]

I ran into this issue too. I discovered there is also a temporary workaround which works on pve-qemu-kvm 10.1.2-1. Go into the Options tab of the VM in PVE and set "Use tablet for pointer" to no, apply it, and then set it back to yes (Do it while the VM is running and all the drivers are loaded). That brings the mouse back until the VM is restarted.

Thanks for this replay.