lemp12 usb-c port detecting devices at usb 2.0 speeds

[thomas-zimmerman]

• Model: lemp12
• BIOS version: 2023-09-08_42bf7a6
• EC version: 2023-09-08_42bf7a6
• OS: Pop!OS 22.04
• Kernel: 6.5.6 (and 6.6.10)

This was found with a Gigabyte USB Ethernet adapters that all are limited to ~300MB speeds when attached to the USB-C port but get full speeds when moved to the USB-A ports.

Additional info

Looking at the kernel logs, devices attached to the USB-A port are detected as "SuperSpeed" devices, while all of the devices that I attached via the USB-C port are getting "high-speed" settings from the kernel.

[leviport]

Since lemp13 had something similar which was fixed in the lemp13 firmware-open branch, I also tried that lemp13 branch on the lemp12 to see if it fixes this. It does not, unfortunately.