Hmm, my card doesn’t even show up as a device specifically if I attach it to either of the “closer to the front” 2/4 expansion ports (Fedora 36, kernel 5.19.9). No interface shows up under ip link / ifconfig, and if I attach to a 1 GbE switch, nothing happens.
Excerpt from journalctl -r
Sep 22 14:40:41 host kernel: usb usb2-port3: config error
...
Sep 22 14:40:21 host kernel: usb usb2-port3: Cannot enable. Maybe the USB cable is bad?
...
Sep 22 14:40:17 host kernel: usb 2-3: device not accepting address 9, error -71
Sep 22 14:40:17 host kernel: usb 2-3: Device not responding to setup address.
Sep 22 14:40:17 host kernel: usb 2-3: Device not responding to setup address.
Sep 22 14:40:15 host kernel: usb usb2-port3: attempt power cycle
Perhaps I have a hardware issue on those ports that other expansion cards haven’t made apparent before. With the other two ports, the link shows up, but no luck actually connecting to my router after testing with a few different cables.
Sep 22 14:56:56 host mtp-probe[7931]: bus: 2, device: 36 was not an MTP device
Sep 22 14:56:56 host mtp-probe[7931]: checking bus 2, device 36: "/sys/devices/pci0000:00/0000:00:0d.0/usb2/2-4"
Sep 22 14:56:56 host NetworkManager[1468]: <info> [1663883816.3231] settings: (enp0s13f0u4c2): created default wired connection 'Wired connection 1'
Sep 22 14:56:56 host NetworkManager[1468]: <info> [1663883816.3197] device (enp0s13f0u4c2): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
Sep 22 14:56:56 host NetworkManager[1468]: <info> [1663883816.3096] device (eth0): interface index 10 renamed iface from 'eth0' to 'enp0s13f0u4c2'
Sep 22 14:56:56 host kernel: cdc_ncm 2-4:2.0 enp0s13f0u4c2: renamed from eth0
...
Sep 22 14:56:55 host mtp-probe[7882]: bus: 2, device: 36 was not an MTP device
Sep 22 14:56:55 host mtp-probe[7882]: checking bus 2, device 36: "/sys/devices/pci0000:00/0000:00:0d.0/usb2/2-4"
Sep 22 14:56:55 host NetworkManager[1468]: <info> [1663883815.6871] manager: (eth0): new Ethernet device (/org/freedesktop/NetworkManager/Devices/10)
Sep 22 14:56:55 host kernel: cdc_ncm 2-4:2.0 eth0: register 'cdc_ncm' at usb-0000:00:0d.0-4, CDC NCM, 9c:bf:0d:00:02:6f
Sep 22 14:56:55 host kernel: cdc_ncm 2-4:2.0: setting tx_max = 16384
Sep 22 14:56:55 host kernel: cdc_ncm 2-4:2.0: setting rx_max = 16384
Sep 22 14:56:55 host kernel: cdc_ncm 2-4:2.0: MAC-Address: 9c:bf:0d:00:02:6f
Sep 22 14:56:55 host kernel: usb 2-4: SerialNumber: 4013000001
Sep 22 14:56:55 host kernel: usb 2-4: Manufacturer: Realtek
Sep 22 14:56:55 host kernel: usb 2-4: Product: USB 10/100/1G/2.5G LAN
Sep 22 14:56:55 host kernel: usb 2-4: New USB device strings: Mfr=1, Product=2, SerialNumber=6
Sep 22 14:56:55 host kernel: usb 2-4: New USB device found, idVendor=0bda, idProduct=8156, bcdDevice=31.04
Sep 22 14:56:55 host kernel: usb 2-4: new SuperSpeed USB device number 36 using xhci_hcd
Anyone have thoughts on things to test?