this post was submitted on 21 Sep 2023
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Linux
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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If you're doing GPU passthrough, then you'd have a dedicated monitor on the iGPU just for managing VMs, and you'd have a second monitor hooked up to the dGPU and it would initialize with the VM bootup. If what you're trying to do is just get multiple monitors on a linux install, then you should just disable the iGPU and don't plug anything into it at all, and only use nVidia driver stack for your setup.
I don't know what problem you're trying to solve exactly. Are you looking to do GPU passthrough on VMs, or are you just trying to get a standard multi-monitor setup on a gaming PC? What, exactly?
iGPU shares one monitor with the dGPU, but on different protocol, which from what I read online is supported.
It only really needs output when I flick it open.
So maybe it needs a KVM switch instead of trusting the monitors splits.
It's possible you need a dedicated KVM for swapping the input of the iGPU/dGPU shared monitor. If the dGPU is only getting passed through to a VM, I don't believe it will initialize until the VM explicitly takes control of it.
And I think vGPU passthrough is disabled on consumer Ada/Ampere architectures unless there's been a crack developed for it since then?
The turing architecture (RTX 20 series) is the only one I know of that has a crack/drivers available for it but I may be wrong/out of date on that info.