Proxmox VNC clipboard sharing not working?

[omarkb93]

I followed the guide here regarding enabling vnc for my Windows 11 VM. I'm using remmina to connect (I also tested with vinagre), and while the display is working, clipboard sharing is not. IT works for another windows machine (not VM) that's running a tiger-VNC server, so I don't think it's an issue on the client side, and it made me think maybe it's on the proxmox side. Is the proxmox vnc server set up to support clipboard sharing in this way, or is there anything I can do to make it so? Maybe this is the same reason the built-in noVNC sharing doesn't have clipboard sharing.

Copy paste works but it is just isolated between systems. I tried looking at vnc logs using `grep vnc /var/log/* -R | less` on the proxmox host but don't see anything particularly conspicuous.

I can't really use spice for my VMs because they have GPUs passed through and spice doesn't play nicely with that.

 

[MarkusF]

I have made a patch series for that, but it is not applied yet:
https://lists.proxmox.com/pipermail/pve-devel/2023-September/059059.html

 

[omarkb93]

oooh fantastic! thanks much, I look forward to it.

 

[omarkb93]

@MarkusF I'm unfamiliar with proxmox development cycles, do you have a sense of when I might hope this is applied, or is there some way I could subscribe or follow the issue?

 

[MarkusF]

We use bugzilla & mailing-lists (in this case: pve-devel) for our development:

https://bugzilla.proxmox.com/show_bug.cgi?id=1406
https://lists.proxmox.com/pipermail/pve-devel/2023-September/059174.html

You could subscribe to our mailing list here:
https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-devel

 

[omarkb93]

It looks like this was included in Proxmox 8.1. Thanks!

 

[omarkb93]

I tested this and it works great, thanks. For future reference, I have the folowing line in my `/etc/pve/local/qemu-server/100.conf`

args: -vnc 0.0.0.0:100

and I ran qm set 100 --vga clipboard=vnc, And made sure my vm had vdagent installed (sudo apt install spice-vdagent). After that, in the proxmox gui -> vm -> hardware -> display shows up as 'Default (clipboard=vnc)' and the clipboard works as expected when connecting to <hostname>:6000 in remina.

Would be great to add the vnc flag and vga clipboard option to the gui (or maybe even make it default) at some point so that it takes less searching.

 

[omarkb93]

Just as an update, we have been using this but find that it can cause some crashes on our windows VMs unfortunately. Seems similar to the thread below. I have largely given up on this for the time being.

https://forum.proxmox.com/threads/s...oxmox-vm-causing-vm-to-abruptly-crash.108604/

 

[390620652]

I tested this and it works great, thanks. For future reference, I have the folowing line in my `/etc/pve/local/qemu-server/100.conf`

args: -vnc 0.0.0.0:100

and I ran qm set 100 --vga clipboard=vnc, And made sure my vm had vdagent installed (sudo apt install spice-vdagent). After that, in the proxmox gui -> vm -> hardware -> display shows up as 'Default (clipboard=vnc)' and the clipboard works as expected when connecting to <hostname>:6000 in remina.

Would be great to add the vnc flag and vga clipboard option to the gui (or maybe even make it default) at some point so that it takes less searching.

Could you show me how dose it work ? I have tried many ways but still didn't succeed.

 

[lubr]

Hi, I have enabled clipboard via

qm set 100 --vga clipboard=vnc

command. I can see new button in noVNC console including textarea for clipboard content. But there is no submit button or anything.

How does this feature work?

 

[MarkusF]

There is no submit button. What you type there will be synced to the VM's clipboard. You need to install spice-vdagent inside the VM.

https://pve.proxmox.com/pve-docs/pve-admin-guide.html#qm_display

 

[TronID]

There is no submit button. What you type there will be synced to the VM's clipboard. You need to install spice-vdagent inside the VM.

https://pve.proxmox.com/pve-docs/pve-admin-guide.html#qm_display

Hello Markus,
Do we install spice-guest-tools for windows vm?
If so, I have installed it but it still doesn't work. Is there anything missing?

Thanks,
Kurniawan

 

[MarkusF]

Hello,

yes, it should work after installing spice-guest-tools in WIndows.

How does your VM config look like and what VNC client are you using?

 

[TronID]

Hello,

yes, it should work after installing spice-guest-tools in WIndows.

How does your VM config look like and what VNC client are you using?

Hello Markus,
I have made sure that the spice-guest-tools application is installed on Windows 11. But it still doesn't work using noVNC. I have attached some screenshots to help me find the cause of the problem.

Thanks,
Kurniawan

 

[MarkusF]

Where did you get the SPICE guest tools?

When installing it from the latest virtio-win-iso (https://pve.proxmox.com/wiki/Windows_VirtIO_Drivers) it should work.
if not, maybe try a different VNC client so we can rule out that noVNC or your browser are part of the problem.

 

[TronID]

From here https://www.spice-space.org/download.html

As you can see it is already installed but it doesn't work. What next should I do?

Screenshot my settings, is it all correct?

 

[TronID]

Hello Markus,

When installing it from the latest virtio-win-iso (https://pve.proxmox.com/wiki/Windows_VirtIO_Drivers) it should work.

I followed your instructions, and it worked. I am very glad you could help me so well. Thank you very much.

Even though the download to be installed is quite large for the clipboard to work and it is still a mystery, why SPICE guest tools can't work while others can. I hope to find the answer.

With Kind Regards,
Kurniawan