VM killed on USB Detach

[tsumaru720]

Hi all

I have a keyboard and mouse attached to a USB switcher. The underlying devices are visible to my host so I pass them through to a VM and it all works fine

If I switch away from the host though, the USB devices detach and it seems QEMU instantly kills the VM.

I'm taking this as a QEMU problem rather than specific to proxmox but just wondering if there are any flags I can use to mitigate this?

Oct 26 13:02:12 yuzuki QEMU[21530]: kvm: hw/usb/core.c:546: usb_packet_check_state: Assertion `!"usb packet state check failed"' failed.
Oct 26 13:02:12 yuzuki kernel: [133108.007504] usb 6-2: USB disconnect, device number 5
Oct 26 13:02:12 yuzuki kernel: [133108.008308] vmbr0: port 4(tap101i0) entered disabled state
Oct 26 13:02:12 yuzuki kernel: [133108.011313] vmbr0: port 4(tap101i0) entered disabled state
Oct 26 13:02:13 yuzuki qmeventd[1066]: Starting cleanup for 101
Oct 26 13:02:13 yuzuki qmeventd[1066]: Finished cleanup for 101
Oct 26 13:02:14 yuzuki systemd[1]: 101.scope: Succeeded.

 

[leesteken]

It sounds a lot like this bug that has been recently fixed (pve-qemu-kvm 5.1.0-2). Can you try updating your Proxmox and/or show us the output of pveversion -v?

 

[tsumaru720]

Already at latest

$ pveversion -v
proxmox-ve: 6.2-2 (running kernel: 5.4.65-1-pve)
pve-manager: 6.2-12 (running version: 6.2-12/b287dd27)
pve-kernel-5.4: 6.2-7
pve-kernel-helper: 6.2-7
pve-kernel-5.4.65-1-pve: 5.4.65-1
pve-kernel-4.15: 5.4-19
pve-kernel-4.15.18-30-pve: 4.15.18-58
pve-kernel-4.4.134-1-pve: 4.4.134-112
ceph-fuse: 12.2.11+dfsg1-2.1+b1
corosync: 3.0.4-pve1
criu: 3.11-3
glusterfs-client: 5.5-3
ifupdown: 0.8.35+pve1
ksm-control-daemon: 1.3-1
libjs-extjs: 6.0.1-10
libknet1: 1.16-pve1
libproxmox-acme-perl: 1.0.5
libpve-access-control: 6.1-3
libpve-apiclient-perl: 3.0-3
libpve-common-perl: 6.2-2
libpve-guest-common-perl: 3.1-3
libpve-http-server-perl: 3.0-6
libpve-storage-perl: 6.2-9
libqb0: 1.0.5-1
libspice-server1: 0.14.2-4~pve6+1
lvm2: 2.03.02-pve4
lxc-pve: 4.0.3-1
lxcfs: 4.0.3-pve3
novnc-pve: 1.1.0-1
proxmox-backup-client: 0.9.1-1
proxmox-mini-journalreader: 1.1-1
proxmox-widget-toolkit: 2.3-1
pve-cluster: 6.2-1
pve-container: 3.2-2
pve-docs: 6.2-6
pve-edk2-firmware: 2.20200531-1
pve-firewall: 4.1-3
pve-firmware: 3.1-3
pve-ha-manager: 3.1-1
pve-i18n: 2.2-1
pve-qemu-kvm: 5.1.0-3
pve-xtermjs: 4.7.0-2
qemu-server: 6.2-15
smartmontools: 7.1-pve2
spiceterm: 3.1-1
vncterm: 1.6-2
zfsutils-linux: 0.8.4-pve2