[Bug 218943] No SuperSpeedPlus on AM4/5 Hubs

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=218943

--- Comment #12 from Mathias Nyman (mathias.nyman@linux.intel.com) ---
Your device was initially detected and trainer as a 10Gpps SSP device in Linux

There were some issues reading descriptors from the device, and giving it an
address, so port was power cycled.
After this the device was enumerated as a SS 5Gbps device.

There are probably some small differences in how Windows and Linux do device
enumeration that cause this.

[  363.960026] usb 4-4: new SuperSpeed Plus Gen 2x1 USB device number 4 using
xhci_hcd
[  369.344592] usb 4-4: unable to get BOS descriptor or descriptor too short
[  369.370574] usb 4-4: unable to read config index 0 descriptor/start: -71
[  369.370586] usb 4-4: can't read configurations, error -71
...
[  370.325161] usb 4-4: Device not responding to setup address.
[  370.537171] usb 4-4: Device not responding to setup address.
[  370.744627] usb 4-4: device not accepting address 5, error -71
[  370.753259] usb usb4-port4: attempt power cycle
[  371.861790] usb 4-4: new SuperSpeed USB device number 6 using xhci_hcd
[  372.067721] usb 4-4: LPM exit latency is zeroed, disabling LPM.
[  372.157551] usb 4-4: New USB device found, idVendor=07ca, idProduct=2553,
bcdDevice= 1.00
[  372.157560] usb 4-4: New USB device strings: Mfr=6, Product=7,
SerialNumber=3
[  372.157564] usb 4-4: Product: Live Gamer Ultra 2.1


Logs with dynamic debug enabled for usb core and xhci host could possibly show
more info

<boot>
mount -t debugfs none /sys/kernel/debug
echo 'module xhci_hcd =p' >/sys/kernel/debug/dynamic_debug/control
echo 'module usbcore =p' >/sys/kernel/debug/dynamic_debug/control
<connect device>
<send dmesg>

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