Le lun. 16 sept. 2019 à 14:57, Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx> a écrit : > So both places that indicate USB 3.1 support are not according to latest spec, > SBRN (Serial Bus Release Number) is 30 instead of 31, and supported protocol > capability minor revision is 0x1 instead of 0x10. Yes. I searched for firmwares, but I only saw a much older version available on Internet. > Most reliable way of checking the current actual port speed is reading protocol speed id > from the ports PORTSC register port-speed field. > Use debugfs: (with your correct pci address and port number) Currently I have "PortSpeed:4" which matches with the "Gen 1" trace. If I even get a "Gen 2" trace again, I will check. > Is the xHCI controller id PCI D0 state even when runtime suspeded? > Some ACPI tables end up preventing D3 for runtime suspend, keeping controller in D0 > and possibly preventing PME# wake signaling It seems you are right, lspci still shows D0 : Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA PME(D0+,D1-,D2-,D3hot-,D3cold-) Status: D0 NoSoftRst+ PME-Enable+ DSel=0 DScale=0 PME- The other USB controllers (AMD 3.0 and 3.1) have "PME(D0+,D1-,D2-,D3hot+,D3cold+)", are in D3 state when runtime suspended, and wake up correctly. Looking at this, I realized the front panel USB3.0 connectors are on the AMD 3.1 controller, I wonder how they are limited to SuperSpeed (configured by the BIOS ?).
