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So if we do gpu passthrough, memory ballooning become unusable or there are still a way around this?

Hi there, I think I'm having the same problem. I see that just like me, you are doing gpu passthrough on your vm while trying to do a memory ballooning. If you only start 1 vm with ballooning (with safe number), and compare the memory used from inside the vm to the memory used from proxmox...

Hi there, Sadly when I try iommu=pt or intel_iommu=pt I get the "No IOMMU detected, please activate it.See Documentation for further information." error message and can't do any passthrough anymore.

Today while doing some tests, I saw that when I start a vm with a IGD passthrough I get this error on the host: [ 1470.342498] DMAR: DRHD: handling fault status reg 3 [ 1470.342502] DMAR: [DMA Read] Request device [00:02.0] fault addr a400a000 [fault reason 05] PTE Write access is not set [...

You could send your physical disk directly to the vm with https://pve.proxmox.com/wiki/Physical_disk_to_kvm Or you could clone your current setup with something like clonezilla and install the clone inside a vm.

For the last few days I'm trying to do a igd passthrough, I managed to send signal to the guest but the drivers don't seem to be loaded correctly. On this computer I have 2 dedicated graphic card and one on my cpu (i7-7700k) The computer is my dayly workstation and will work 100% from the vm, so...