Virt-Manager running Windows 10

My employer has provided me with a lovely new laptop, a completely blank slate, ready for me to install an OS and setup. I have gone with Fedora 38 Beta because of the maturity of Fedora in general, and a general hedonistic desire for pain.

Some of my work is on Windows 10, for which I have a virtual machine that I copied over from the old laptop. Here’s where my pain begins.

Permissions – Selinux as setup on Fedora won’t let KVM touch the hard disk image I have copied over. Try “chcon -t virt_content_t -R PATH/TO/VMs”.

You want multiple VMs to talk to each other without the IP address changing all the time, and they must be able to access the internet no matter what network you are actually connected to – Use the bridge. It’s probably already setup as “virbr0”. That’s all, just use bridged networking. Each machine will be allocated an IP, on next startup, that will remain with it for a very long time.

Display and fractional scaling issues – Set “Scale Display” to “Never” and enable “Auto resize VM with window”. Set video to QXL and then edit the XML to double each of the RAM values. Make sure you have added a spice channel, target name “com.redhat.spice.0”. Install spice tools on the guest machine. Set DPI to 200% in the guest. Whatever fractional scaling you use on your Linux desktop, the guest will be appropriately scaled.

Sleep mode doesn’t work or isn’t present – This is a pain, because suspend to RAM basically doesn’t work, it crashes on resume. Suspend to disk on the other hand does work, with coaxing, and there’s no button in the UI to initiate it. Edit the XML and ensure “suspend-to-disk” is enabled. Install the virtio client tools in the guest, they can be downloaded from the Proxmox web site. Add a new spice channel for the QEMU guest agent. Restart the guest. You can now hibernate the VM from the host with this command line “virsh -c qemu:///system dompmsuspend win10dev disk”.

Naturally much of this will work differently, or not at all for you, but here it is as future notes for me, and hopefully the start of finding your solutions.

We don’t use Linux because it’s easy.


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