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Can I install Ubuntu 18 software on Ubuntu 22.04? (Technically Linux Mint 21.3)
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this post was submitted on 25 Jan 2024
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For maximum performance you probably want to skip virt-manager, virt-viewer has a hardcoded FPS cap.
If you use QEMU directly and use virtio-gpu paired with the sdl or gtk display, and OpenGL enabled, you can run Ubuntu at 4K144Hz no problem. The VM is near imperceptible, and it works out of the box, that's not even touching the crazy VFIO stuff.
Perhaps I was a bit vague with the word "performance", but given that this user only seems to be interested in running ROS, there is absolutely no reason they need anything above the FPS cap (hence my recommendation of
virt-manager, as it is quite user friendly). The "performance" aspect of it boils down to CPU utilization and efficiency more than anything.