https://bugzilla.kernel.org/show_bug.cgi?id=62611

--- Comment #8 from Lan Tianyu <[email protected]> ---
(In reply to Alan Stern from comment #6)
> This does not sound like a USB problem.  It might be a problem somewhere
> else (ACPI, for instance).  Or it might be caused by a bug in the BIOS. 
> Have you checked for BIOS updates?

Hi Alan:
       Thanks for response. Enabling device's wakeup via /proc/acpi/wakeup is
just to open device's wakeup gpe and remain its power during system suspend
from ACPI side. If the device sent wakeup signal immediately after system
suspend, the symptom would take place. So I guessed it's USB related issue
first.

> 
> In any case, if you have a kernel that works, the simplest way to find the
> solution may be git bisection.
>

Yes, git bisect is the best way.

Hi Alejandro:
         Could you check whether these is a good upstream kernel version for
this issue? If yes, please do git bisect.

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