[Bug 218943] No SuperSpeedPlus on AM4/5 Hubs

[bugzilla-daemon@kernel.org]

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

--- Comment #13 from Jarrard (jarrard@proton.me) ---
(In reply to Mathias Nyman from comment #12)
> 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>

Ok Cheers I'll check this out and post results if I find anything.  And yeah
the USB devices under Linux do get power cycled from time to time as they can
freeze up occasionally when used in OBS.

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