proxmox Proxmox PCIE Issues

[welcome2_themachine]

I'm facing some unique PCIE issues with the latest hardware addition to my proxmox server. Everything was working fine before, and now the add-in NIC isn't recognized, there seem to be USB connectivity issues, and other PCIE related failures. I think it's a bios settings, but I'm at a loss for which settings I need to tweak.

 

Background: I wanted to try virtualizing a mac os VM, so I added in my old R9 290. My NIC, which worked just fine before, had to move to the PCIE 1_1 slot from the PCIE 1_2 slot, due to how the lane sharing works on my motherboard (PCIE x16_2 runs in x4 mode if PCIE 1_2, and 1_3 are unoccupied; it runs in x2 mode if either is populated). I've successfully booted into live USBs and everything shows up on lspci except the nic, no matter which slot it's in. I've attempted removing the new GPU but the problem persists.

 

Specs:

• Asus B550 Prime Pro Motherboard
• Ryzen 7 3700X
• 64GB DDR4 @3200mhz (4x16)
• EVGA 3060 12GB (PCIE x16_1)
• 2.5gb/s NIC (PCIE 1_1)
• Asrock Radeon 290 (PCIE x16_2) -> runs at x4
• Storage: 2x 1TB NVME SSDs, 4x SATA SSDs

Bios Settings I've been messing with (to no effect), currently are are set to enabled but I've tried all the combos:

• Fastboot
• 4G Decoding / Resizable BAR
• DOCP (RAM overclocking)
• SR-IOV

Any ideas?

[Kilrah]

Try to check whether CSM / Legacy BIOS mode is enabled/disabled. Maybe putting in the old GPU forces CSM on, and then the NIC won't work with that...

[welcome2_themachine]

I attempted flipping CSM off / on - but no change. Latest update: I booted a pop os live disk and everything shows up and works. Maybe there's some issues in my kernel arguments for my proxmox instance?