[Bug 221318] mice behind ASMedia ASM1042A via Thunderbolt 2 never produce input, most likely due to interrupt pipe idle window during enumeration

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=221318

--- Comment #7 from Michał Pecio (michal.pecio@gmail.com) ---
(In reply to manauer.uel from comment #6)
> The Thunderbolt log contains two controllers: Intel (0000:00:14.0) and
> ASMedia (0000:0a:00.0). The Intel slot 2 ep 2 stalls that repeat every two
> seconds or so throughout the log are from a different device
Unrelated, though a little odd. Can you check what's making this noise?
cat /sys/kernel/debug/usb/xhci/0000:00:14.0/devices/02/name

> The ASMedia side is where things go wrong. During each enumeration attempt
> of the mouse (slot 3), ep 0 stalls repeatedly while the device is being
> configured. That part eventually completes and the mouse is recognized.
Same thing on the good bus. EP 0 stall is just some control request unsupported
by the device. More interesting is interrupt endpoint 0x81 aka "ep 2".

But little happens here. The initial Stopped events on ep 2 and 4 are probably
xhci_endpoint_reset(), then EP 0 stalls twice more and then usbhid cancels some
URB from the interrupt endpoint.

Does this cancellation go away when you enable the udev rule or ALWAYS_POLL?
Maybe something goes wrong here.

Then there is nothing, which means that URBs are completing successfully or not
at all (as the mouse doesn't work, probably the latter). At some point
disconnection and cancellation again, which proves that there was some URB on
the endpoint at the time.

> But then this appears:
> > xhci_hcd 0000:0a:00.0: Split transaction error for slot 3 ep 2
> > xhci_hcd 0000:0a:00.0: Hard-reset ep 2, slot 3
> 
> Shortly after, the mouse disconnects:
> > usb 3-1.1: USB disconnect, device number 5
I/O errors aren't entirely uncommon when a device disconnects. Does it mean
that the device kept disconnecting by itself and it wasn't you doing it?

Do you have some other USB 2.0/3.0 hub you could put between the monitor and
the mouse? Does it make any difference?

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