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+
+LXD fails to create VM with QEMU 7.2.0: "../../net/net.c:1106: net_client_init1: Assertion `nc' failed."
+Description of problem:
+Beginning with QEMU 7.2.0, LXD is unable to launch virtual machines using the default network profile, which breaks the out-of-box experience if a user wishes to create a virtual machine. This worked correctly with QEMU 7.1.0.
+
+Multiple users across different Linux distributions are reporting this issue:
+- https://discuss.linuxcontainers.org/t/failed-adding-nic-netdev-monitor-is-disconnected/15946
+- https://forums.gentoo.org/viewtopic-p-8774212.html
+- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1030365
+
+```
+gibmat@tharkun:~$ lxc launch images:debian/sid debian-sid-vm --vm
+Creating debian-sid-vm
+Starting debian-sid-vm                        
+Error: Failed setting up device via monitor: Failed setting up device "eth0": Failed adding NIC netdev: Monitor is disconnected
+Try `lxc info --show-log local:debian-sid-vm` for more info
+gibmat@tharkun:~$ lxc info --show-log local:debian-sid-vm
+Name: debian-sid-vm
+Status: STOPPED
+Type: virtual-machine
+Architecture: x86_64
+Created: 2023/02/10 23:47 UTC
+
+Log:
+
+warning: tap: open vhost char device failed: Permission denied
+warning: tap: open vhost char device failed: Permission denied
+qemu-system-x86_64: ../../net/net.c:1106: net_client_init1: Assertion `nc' failed.
+
+```
+
+```
+gibmat@tharkun:~$ qemu-system-x86_64 --version
+QEMU emulator version 7.2.0 (Debian 1:7.2+dfsg-2)
+Copyright (c) 2003-2022 Fabrice Bellard and the QEMU Project developers
+gibmat@tharkun:~$ lxc version
+Client version: 5.0.2
+Server version: 5.0.2
+```
+Steps to reproduce:
+1. Install LXD and QEMU 7.2.0
+2. `lxc launch images:debian/sid debian-sid-vm --vm`
+  - This will fail as reported above
+3. Downgrade to QEMU 7.1.0 (such as from https://snapshot.debian.org/package/qemu/1%3A7.1%2Bdfsg-2/)
+4. `lxc launch images:debian/sid debian-sid-vm --vm`
+  - Now VM creation is successful
+    ```
+    gibmat@tharkun:~$ lxc launch images:debian/sid debian-sid-vm --vm
+    Creating debian-sid-vm
+    Starting debian-sid-vm
+    gibmat@tharkun:~$ lxc list
+    +---------------+---------+------+-----------------------------------------------+-----------------+-----------+
+    |     NAME      |  STATE  | IPV4 |                     IPV6                      |      TYPE       | SNAPSHOTS |
+    +---------------+---------+------+-----------------------------------------------+-----------------+-----------+
+    | debian-sid-vm | RUNNING |      | fd42:ea61:feb4:55ef:216:3eff:feb8:2e8c (eth0) | VIRTUAL-MACHINE | 0         |
+    +---------------+---------+------+-----------------------------------------------+-----------------+-----------+
+    gibmat@tharkun:~$ lxc info --show-log local:debian-sid-vm
+    Name: debian-sid-vm
+    Status: RUNNING
+    Type: virtual-machine
+    Architecture: x86_64
+    PID: 2502
+    Created: 2023/02/11 15:08 UTC
+    Last Used: 2023/02/11 15:08 UTC
+    
+    Resources:
+      Processes: -1
+      Network usage:
+        eth0:
+          Type: broadcast
+          State: UP
+          Host interface: tap5efa7582
+          MAC address: 00:16:3e:b8:2e:8c
+          MTU: 1500
+          Bytes received: 3.13kB
+          Bytes sent: 164B
+          Packets received: 12
+          Packets sent: 2
+          IP addresses:
+            inet6: fd42:ea61:feb4:55ef:216:3eff:feb8:2e8c/64 (global)
+    
+    Log:
+    
+    warning: tap: open vhost char device failed: Permission denied
+    warning: tap: open vhost char device failed: Permission denied
+    
+    gibmat@tharkun:~$ qemu-system-x86_64 --version
+    QEMU emulator version 7.1.0 (Debian 1:7.1+dfsg-2+b3)
+    Copyright (c) 2003-2022 Fabrice Bellard and the QEMU Project developers
+    ```