Proxmox version 7.3-3
GPU Nvidia 3060ti, AMD 6600xt
CPU 5600x
Motherboard ASRock B550M Pro4
After a month or two of smooth(ish) sailing I rebooted my proxmox host because my vms were giving some weird behaviors, and when the host booted back up I was met with this error when the machines tried to boot up "TASK ERROR: cannot prepare PCI pass-through, IOMMU not present". I took a look at some other threads here I could find, but no answers that I could find. /etc/default/grub has these settings:
GRUB_DEFAULT=0
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet amd_iommu=on iommu=pt pcie_acs_override=downstream,multifunction"
GRUB_CMDLINE_LINUX=""
and my setup is definitely using grub as questioned by other threads, during boot it comes up with the gnu grub version and everything.
I don't remember the command but one thread asked the op to list the iommu groups to see if there were still multiple, and for me there were. If it would help I can post my specific output from my system.
Edit: ok i got some help from reddit, it was bios settings
GPU Nvidia 3060ti, AMD 6600xt
CPU 5600x
Motherboard ASRock B550M Pro4
After a month or two of smooth(ish) sailing I rebooted my proxmox host because my vms were giving some weird behaviors, and when the host booted back up I was met with this error when the machines tried to boot up "TASK ERROR: cannot prepare PCI pass-through, IOMMU not present". I took a look at some other threads here I could find, but no answers that I could find. /etc/default/grub has these settings:
GRUB_DEFAULT=0
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet amd_iommu=on iommu=pt pcie_acs_override=downstream,multifunction"
GRUB_CMDLINE_LINUX=""
and my setup is definitely using grub as questioned by other threads, during boot it comes up with the gnu grub version and everything.
I don't remember the command but one thread asked the op to list the iommu groups to see if there were still multiple, and for me there were. If it would help I can post my specific output from my system.
Edit: ok i got some help from reddit, it was bios settings
Last edited: