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Try to pass-through both, function 0 and 1, after having unloaded the driver module from the Proxmox host. Let's see if the issue is the fact, that you are trying to pass through a device, while the host's driver is still active and is managing the device.

Looking good, according to the posted output. Only thing I see is, that you originally only wanted to pass-through one Ethernet interface, right? Just function 1, but not function 0? According to your output, both have been passed through. Did you by any chance enable the "all functions" option...

What does "dmesg|grep -i vfio" on the proxmox host say? And is the device listed inside the VM (lspci), or is it completely missing?

The entry "options vfio-pci ids=03:00.1", that you created, is simply wrong. You need the actual PCI-ID (see here https://admin.pci-ids.ucw.cz/read/PC/8086) and NOT the bus number and function here. In your case, this would be "options vfio-pci ids=8086:15ad". See your own lspci quote.

@kjkent: The OP did mention "and see it on a monitor". And I guess a physical display was meant by that. As far as I know, this is only possible via full pass-though. @SInisterPisces: I am in no way sure, but maybe that Alderlake iGPU needs the same a similar reset-workaround, as some slighly...

Undervolting and server-type usage is not really what most people like to mix. For a gaming machine, where you might lose all your save games in the worst case, it probably is OK (at least for most people). However, when it comes to valuable personal data, I personally would think more than...

If you cannot deliver any real technical background, as to why that ASUS feature would be so groundbreaking, concerning power-efficiency-optimization, then I'm afraid you just repeated Asus marketing babble. Sorry if that sounds harsh, but if you use phrases like "usually a 7-11w drop on both...

Just ran a quick test with kernel 6.8 on my Win10 gaming VM. Finally, this again shows the same performance on this machine, as did the old 5.13 kernel. Anything since then had atrocious performance, with unbearable lags every few seconds. So no idea what was done, but it is finally good again.

It is not a power-efficiency champion, according to some comments, but it might be an improvement (https://www.gigabyte.com/de/Enterprise/Server-Motherboard/MC12-LE0-rev-1x): https://www.ebay.de/itm/132936385331 I don't think you'll win much, considering the mere idle power consumption, but...

Devices 2-6 are all on the same IOMMU group. See your own screenshots. That means you cannot pass-through just one, but you can only handle them all at a time. You are trying to pass only devices 4 (Asmedia SATA) and 5 (Realtek 2.5G Ethernet) to a VM. This is why the whole system freezes, as you...

What you are decscribing sounds a bit like this: https://www.cnx-software.com/2024/01/04/qotom-q20332g9-s10-fanless-mini-pc-features-four-10-gbe-and-five-2-5gbe-ports/

Small addition, now that I think of it: Even the E3900 ApolloLake SOCs can do ECC. If those are up to the task, in general, is a different question. And concerning the original question from tonycav: I could guess, that your system might idle with something like 12W - 18W, but there are too...

That is absolutely correct. However I doubt, that Enterprise SSDs is what tonycav had in mind. But good point as well: What kind of storage class (Consumer, Mid-Range-Workstation class or even Enterprise) do I intend to use for my data. Most of the time the power-consumption goes up with each...

A few points, concerning low power: - Consider that 3.5" drives will usually consume way more power, even in idle, when compared to 2.5" hdds and especially any kind of flash based storage (be it NVMes or SATA or SAS SSDs). - So, if you do not need the highest storage capacity at all times, then...

You might be interested in looking into the "hookscript" feature: https://pve.proxmox.com/pve-docs/pve-admin-guide.html (search for "hookscript")

Are you sure you are even using the Grub-bootloader? Does "cat /proc/cmdline" show your additions, concerning ASPM? Depending on how you installed, you might be using systemd-boot. Then editing the grub config would of course be pointless. In that case, you would need "/etc/kernel/cmdline". See...

Maybe a silly question: You did reboot after the "update-grub", right?

"/usr/lib/modules/5.15.0-100-generic/kernel/drivers/gpu/drm/i915/i915.ko" is clearly not the correct place for the modules. I have no idea how they ended up there, or what you are actually doing. Why don't you lose that strange image and do a clean install, like you would do with a bare-metal...

This is what you need: https://packages.ubuntu.com/jammy/kernel/linux-modules-extra-5.15.0-100-generic

Just a quick comment, concerning the power-consumption, but intentionally not fully tackling your "1 all-in-one machine vs. 2 dedicated machines" thought: For pass-through to work, you usually completely unload all the relevant drivers from the host OS (Proxmox here). Which means, that this...