id = 1305
title = "qemu will detach usbredir if backend chardev socket disconnect"
state = "opened"
created_at = "2022-11-08T06:34:10.310Z"
closed_at = "n/a"
labels = ["Chardev", "USB"]
url = "https://gitlab.com/qemu-project/qemu/-/issues/1305"
host-os = "CentOS 7.4"
host-arch = "x86"
qemu-version = "QEMU emulator version 2.12.0 (qemu-kvm-ev-2.12.0-44.1.el7)"
guest-os = "CentOS 7"
guest-arch = "x86"
description = """When using the usbredir device in the VM, initiate a hot migration to the VM.  
After the migration is completed, the drive letter of the usb in the VM has changed.  
Actually the device has been unplugged and re-plugged in the VM.  
I think we should keep the plugged state of the device after the migration?"""
reproduce = """1. Start a usbredirserver `usbredirserver -p 7000 -v 4 5-2`;
2. Start a VM with a usbredir device attached to it;
3. Mount the usb device in the VM;
4. Migrate the VM, after the migration done, wait a minute，the drive letter of the usb in the VM has changed."""
additional = """I've found this bug https://bugzilla.redhat.com/show_bug.cgi?id=1254971, this is just to allow the chardev to be reconnected in time when it is disconnected.   
Can we make chardev reconnect without unpluging the usbredir device?"""