r/kvm

▲ 2 r/kvm

What could make a Linux-Guest run sluggish while Windows ran great?

I'm pretty inexperienced with KVM/Qemu and currently doing more or less trial and error. My current situation is as followed:

I had a virtual machine set up (Linux host; Win 10 guest) with a dedicated GPU for some light gaming. This worked out quite well. A few days ago I decided to see how far gaming under Linux has come, so I set up a new virtual machine with a pretty similar configuration to the Windows machine and installed Cachy-OS as a guest. I was surprised to notice that the performance was way worse than with the Windows guest (I'm not only talking about running games, but also other day-to-day tasks like launching programs, browsing web-pages etc.) I assigned the same resources, so could you help me how to figure out, what makes the system feel so much slower? Honestly I don't really know where I should start looking...

My Configuration

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u/AllesMeins — 13 days ago
▲ 7 r/kvm

Move KVM VM from one machine to another (changing linux distro)

Hi All,

I've been using PopOS 24.04LTS but it's just way too buggy right now (they've labelled it a stable release but while it's a promising project it's really still in alpha) so I want to switch distros.

However, for some of my work I need ANSYS Fluent so I've set that up in a VM. Getting ANSYS to work on linux is a colossal pain in the arse as they get you to download an installer and then feed it half a dozen digital copies of CD data (I wish I was kidding) then set up a massively convoluted licencing server.

Therefore, I'd like to avoid setting all that up again. Is there a way I can save the VM to an external hard drive and then recover the VM when I switch distros?

Thanks,

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u/Pioneer_11 — 13 days ago