Hi Christian, I can tell you what was happening for me.
I run all my VMs through virt-manager, so I first open up virt-manager and then start my Windows Server 2019 VM. The VM boots fine and I get to the login screen where I need to send a CTRL+ALT+DELETE to login. A couple extra seconds after reaching the login screen my entire hos system hangs. By this I mean I can no longer move the mouse in the Gnome DE, the screen no longer updates (one time I had a browser window open with some animated content), I can't switch to a virtual terminal (e.g. using CTRL+ALT+FX), nothing. It makes no difference if I quickly hit CTRL+ALT+DELETE and start to type my name in, or if I just start the VM and wait, it always freezes my entire system, everything is unresponsive, and the only way to restart is to do a hard power off / power on. The reason I determined it was the networking that caused the problem is because after one of these hard power off / power on cycles, the VM asked me if I wanted to boot into safe mode. I chose this option and the same thing happened. The next time I chose safe mode without a network connection and everything worked fine. I could browse files on the VM, start programs, etc. After that I start messing with the configuration for my VM, and specifically removed the network hardware, the VM started fine - it was then that I realized the networking causes the problem. I also tried with a clean ISO install to eliminate the possibility of the qemu guest agent causing the issues. I can run through the entire Windows Server 2019 installation process, but once I reboot after I've completed the installation, I get the same hard hang where the host system is entirely unresponsive. One thing I thought of is providing you access to the Windows Server 2019 ISO, this wouldn't violate any license agreements as you can install it without needing to put a key in (trial mode). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1849720 Title: Running VM with Virtual NIC Crashes Host OS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1849720/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
