Can't select EFI boot option from BIOS

[thiner]

It's a long story before I came here to ask this question. In short, I am trying to passthru the GPU to a guest OS (an OMV5 instance). I followed the official instruction(https://pve.proxmox.com/wiki/Pci_passthrough#Enable_the_IOMMU), but failed while starting up the OMV instance due to BIOS was set to "OVMF" mode. So googled and found this official guide: https://pve.proxmox.com/wiki/OVMF/UEFI_Boot_Entries. Tried to follow the guide to fix the UEFI boot option on OMV instance, but I failed at step 2. It's empty in the file explorer! My screenshot as below:

Can somebody tell what's going on here? I'm a real novice to PVE, just started from last week.
Thanks in advance!

 

[Stefan_R]

Did you install OMV5 correctly? I suspect it should support UEFI natively, if not that is a bug in OMV, not PVE...

 

[thiner]

I've solved the problem. The previous OMV installation was installed with GRUB, so there wasn't UEFI boot file. I reinstalled OMV5, and chose UEFI mode this time, the problem solved after installation complete.
Anyway, thanks for your reply.