[Bug 219681] ASUS Zenbook S 14 UX5406SA: Unstable USB connection on USB-A port under certain condition

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=219681

Michał Pecio (michal.pecio@gmail.com) changed:

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--- Comment #1 from Michał Pecio (michal.pecio@gmail.com) ---
Are the working and not working ports on the same USB bus, or on different
ones? Perhaps two different types of USB controllers?

You can see the mapping between USB buses and PCI controllers with
ls -l /sys/bus/usb/devices/usb*

udisks2 collects SMART data and this is known to cause problems with some
combinations of USB controllers and disk enclosures in UAS mode. It usually
recovers after the reset, so not sure why
[  131.357007] sd 0:0:0:0: Device offlined - not ready after error recovery

The network issue is possibly unrelated, because in this case the hub simply
reports complete disconnection of the device and it comes back a moment later
for unclear reasons.

I wonder if any of that is preceded by low level USB errors? Maybe try again
with some dynamic debug:
echo 'func handle_tx_event +p' >/proc/dynamic_debug/control
echo 'func handle_transferless_tx_event +p' >/proc/dynamic_debug/control

I presume this is not a regression and there are no kernel versions where it
works correctly?

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