USB 4 / Thunderbolt 3 NIC

[tqt3e]

I tried to use a Thunderbolt 3 NIC with Intel 82599 chip inside, but Proxmox doesn't recognize it & doesn't create the network interfaces.
Proxmox is on v9.06, all latest updates installed. Also Tried with & without Secure boot & trusted computing.

Tested to work on windows, so doesn't seem to be a cable / hardware problem.

So for, I have already enrolled the device with boltctl, and it seems to detect & connect:

boltctl info be030000-0042-441e-03d3-47dc4a45d808
 ● Shenzhen Dongman Technology Co.,ltd DM7801BJ
   ├─ type:          peripheral
   ├─ name:          DM7801BJ
   ├─ vendor:        Shenzhen Dongman Technology Co.,ltd
   ├─ uuid:          be030000-0042-441e-03d3-47dc4a45d808
   ├─ dbus path:     /org/freedesktop/bolt/devices/be030000_0042_441e_03d3_47dc4a45d808
   ├─ generation:    Thunderbolt 3
   ├─ status:        authorized
   │  ├─ domain:     ffbc3804-005f-01bd-ffff-ffffffffffff
   │  ├─ parent:     ffbc3804-005f-01bd-ffff-ffffffffffff
   │  ├─ syspath:    /sys/devices/pci0000:00/0000:00:08.3/0000:c7:00.5/domain0/0-0/0-2
   │  ├─ rx speed:   40 Gb/s = 2 lanes * 20 Gb/s
   │  ├─ tx speed:   40 Gb/s = 2 lanes * 20 Gb/s
   │  └─ authflags:  none
   ├─ authorized:    Sat 30 Aug 2025 10:45:08 AM UTC
   ├─ connected:     Sat 30 Aug 2025 10:45:05 AM UTC
   └─ stored:        Thu 28 Aug 2025 09:48:45 AM UTC
      ├─ policy:     auto
      └─ key:        no

Proxmox seems to only 'see' the thunderbolt device, but not the NIC.

> lspci
05:00.0 PCI bridge: Intel Corporation JHL7440 Thunderbolt 3 Bridge [Titan Ridge DD 2018] (rev 06)
06:01.0 PCI bridge: Intel Corporation JHL7440 Thunderbolt 3 Bridge [Titan Ridge DD 2018] (rev 06)
06:02.0 PCI bridge: Intel Corporation JHL7440 Thunderbolt 3 Bridge [Titan Ridge DD 2018] (rev 06)
06:04.0 PCI bridge: Intel Corporation JHL7440 Thunderbolt 3 Bridge [Titan Ridge DD 2018] (rev 06)

Any suggestions on what I can do next?

 

[Flocki]

Did you try unplugging and replugging while the system is running?

 

[tqt3e]

Did you try unplugging and replugging while the system is running?

I got it working by a few args into grub: GRUB_CMDLINE_LINUX_DEFAULT="pci=assign-busses,realloc,hpbussize=0x10,hpmmiosize=128M,hpmmioprefsize=1G"

Though it struggles to reconnect after rebooting Proxmox.

 

[readyspace]

@tqt3e you might want to check if there is an update on Bios firmware available. I suspect that there is a need to update it.

 

[tqt3e]

@tqt3e you might want to check if there is an update on Bios firmware available. I suspect that there is a need to update it.

Unfortunately it already has latest available BIOS installed. AMD CPU microcode is also up to date.