USB keyboard not detected with dGPU with USB Type-C port

Dear SeaBIOS folks, Do you have any ideas regarding the USB issues with a dedicated GPU device with integrated USB Type-C port plugged in [1]? Kind regards, Paul [1]: https://ticket.coreboot.org/issues/414

Paul Menzel wrote:
Do you have any ideas regarding the USB issues with a dedicated GPU device with integrated USB Type-C port plugged in [1]?
Only speculation: Maybe multiple xHCI controllers trip up the SeaBIOS xHCI driver? Two tests would be useful, the latter can be performed by anyone: 1. Connect the keyboard to the graphics card USB port (try with and without a hub) 2. On any mainboard with coreboot and SeaBIOS (maybe even qemu), connect multiple xHCI host controllers (PCIe cards) and see what the logs say. Kind regards //Peter
participants (2)
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Paul Menzel
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Peter Stuge