After power outage host will not boot

lpearl

New Member
Jul 17, 2025
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Hi,

Everything has been working fine for months on 6.8.12-10-pve with gpu passthrough on 4 Windows VMs. I had a power outage, which has caused the system to not boot.
It gets stuck at Loading Initial ramdisk. It was recommended to me that I should try disabling virtualization and iommu in the bios. I also added nomodeset debug to the kernel to try and get some more info.

I get the error vfio-pci: probe of 0000:81:00.0 failed with error -22 Not sure if this is because of disabling virtualization and iommu.

My last resort is trying to recover my vms and reinstalling proxmox. It's a strange issue, and I'm not sure what's going on.

I would appreciate any advice!

MB: Asus Pro WS TRX50-SAGE WIFI

CPU: AMD Threadripper 7960x

Storage: Samsung 990 EVO PCIe NVMe SSD 2TB

RAM: Kingston S.RenePro DER 4800 32Gx4 C36

GPUs (for passthough): 4x Gigabyte GeForce RTX 3050 LP OC 6G


EDIT: It ended up getting it to boot by adding initcall_blacklist=vfio_pci_init to the kernel arguments. I'm guessing something changed with the IOMMU, which prevented it from booting. I'm not sure how to prevent this from happening again.
 
Last edited:
EDIT: It ended up getting it to boot by adding initcall_blacklist=vfio_pci_init to the kernel arguments. I'm guessing something changed with the IOMMU, which prevented it from booting. I'm not sure how to prevent this from happening again.
Please look at /etc/default/grub or /etc/kernel/cmdline respectively.

To get more information on boot, you can also remove the quiet command line flag so that you will see more.