[Latest] Proxmox - USB disconnects freeze KVM

[Dragon19]

Using Proxmox with either a windows guest or linux guest - disconnecting a USB device freezes the VM.

This did not happen on older versions of proxmox.

Currently using a four port USB kvm switch.

 

[tom]

Please tell the detailed version of working and not-working package versions.

"Latest" is not an exact version.

 

[Dragon19]

Hello,

The kernel is 5.4.41-1-pve and the pve manager is 6.2-4.

 

[Shadow2091]

I confirm, the problem is present.

 

[Someone123]

Yes, problem is reproducible.

 

[leesteken]

I can also reproduce the issue with Proxmox 6.2-10, which I posted about in Ubuntu 20.04 random freeze.
I did not have this problem on earlier versions (6.1 and before), but I was also using other hardware at the time.

 

[Steffenprox]

Similar error reports:
https://forum.proxmox.com/threads/vm-freezes-when-disconnecting-usb-keyboard-and-mouse.70287/
https://forum.proxmox.com/threads/usb-drive-crashes-vm.70214/

 

[skytrooper09]

Can confirm that this is an issue for me too. Very frustrating with a KVM switch where it is much less feasible to keep the mouse/keyboard plugged in.

PVE: 6.2-10
Kernel: 5.4.44-2-pve

 

[Jarvar]

I'm getting the same issue in regards to Proxmox Backup Server which is a VM inside my Proxmox Server. The USB Passthrough started disconnecting and locking up the VM.

 

[leesteken]

There is this bug report and it appears to be an upstream QEMU issue...

 

[Jarvar]

I had this issue a while back as well. I think I may have figured out the issue this time. I had restored a remote VM to my Proxmox Server that uses the exact same name for USB0 as well as the hose name
ie: -usb0 host=0bc2:ab28,usb3=1

which is the same as the one passed through to my PBS server VM. I stopped the VM or atleast removed the USB device from the offending VM and thee URB -71 and some other errors stopped.

Thank you so much for your help.