Public bug reported: Setup:
Host: Debian/SID, Kernel 5.6, QEMU 5.0 Guest: Windows 10 VM with PCI and USB device passthrough. Problem: Guest VM suddenly hangs when pulling USB device out from the Host. Observations: - Issue appears to be related to QEMU 5.0 - It started after an upgrade to QEMU 5.0. - Downgrading only QEMU on multiple systems fixes the issue. - Issue is very reproducible. - Most of the time within a few attempts of pulling/reconnecting the device. - Issue happens with multiple devices (I did try standard HID devices, a webcam and an x-ray sensor). - Guest just hangs. - Display output remains on last frame shown. - Ping to Guest immediately stops working. - Logs in the Guest stop logging immediately. - Host is fine and thinks the Guest is fine. - Guest continues to show as running in "virsh list". - No suspicious entries in the QEMU logs. - No suspicious entries in Host syslogs/messages. - Host can can kill guest "virsh destroy" and respawn fine. - Issue seems widespread. - Multiple similar reports from ProxMox users after upgrade to ProxMox 6.2 for both Windows and Linux guests (First version that uses QEMU 5.0) https://forum.proxmox.com/threads/vm-freezes-when-disconnecting-usb-keyboard-and-mouse.70287/ https://forum.proxmox.com/threads/usb-drive-crashes-vm.70214/ https://forum.proxmox.com/threads/latest-proxmox-usb-disconnects-freeze-kvm.70398/ https://forum.proxmox.com/threads/vm-with-gpu-passthrough-freezes-when-turning-off-monitor-after-proxmox-6-2-upgrade.69821/ https://forum.proxmox.com/threads/vm-with-gpu-passthrough-freezes-when-turning-off-monitor-after-proxmox-6-2-upgrade.69824/ I'd be more than happy any debugs that might be helpful. ** Affects: qemu Importance: Undecided Status: New -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1884684 Title: QEMU 5.0: Guest VM hangs/freeze when unplugging USB device Status in QEMU: New Bug description: Setup: Host: Debian/SID, Kernel 5.6, QEMU 5.0 Guest: Windows 10 VM with PCI and USB device passthrough. Problem: Guest VM suddenly hangs when pulling USB device out from the Host. Observations: - Issue appears to be related to QEMU 5.0 - It started after an upgrade to QEMU 5.0. - Downgrading only QEMU on multiple systems fixes the issue. - Issue is very reproducible. - Most of the time within a few attempts of pulling/reconnecting the device. - Issue happens with multiple devices (I did try standard HID devices, a webcam and an x-ray sensor). - Guest just hangs. - Display output remains on last frame shown. - Ping to Guest immediately stops working. - Logs in the Guest stop logging immediately. - Host is fine and thinks the Guest is fine. - Guest continues to show as running in "virsh list". - No suspicious entries in the QEMU logs. - No suspicious entries in Host syslogs/messages. - Host can can kill guest "virsh destroy" and respawn fine. - Issue seems widespread. - Multiple similar reports from ProxMox users after upgrade to ProxMox 6.2 for both Windows and Linux guests (First version that uses QEMU 5.0) https://forum.proxmox.com/threads/vm-freezes-when-disconnecting-usb-keyboard-and-mouse.70287/ https://forum.proxmox.com/threads/usb-drive-crashes-vm.70214/ https://forum.proxmox.com/threads/latest-proxmox-usb-disconnects-freeze-kvm.70398/ https://forum.proxmox.com/threads/vm-with-gpu-passthrough-freezes-when-turning-off-monitor-after-proxmox-6-2-upgrade.69821/ https://forum.proxmox.com/threads/vm-with-gpu-passthrough-freezes-when-turning-off-monitor-after-proxmox-6-2-upgrade.69824/ I'd be more than happy any debugs that might be helpful. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1884684/+subscriptions
