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Date:   Fri, 15 Sep 2017 21:49:11 -0700
From:   Kai-Heng Feng <>
To:     Mathias Nyman <>
Cc:     Greg KH <>,,, USB list <>,
        LKML <>,
        "Tsai, Nicholas" <>,
        Nehal Shah <>,
        Ramkumar Subramaniyan <>
Subject: Re: [PATCH] Revert "xhci: Limit USB2 port wake support for AMD
 Promontory hosts"

On Mon, Aug 28, 2017 at 9:56 PM, Kai-Heng Feng
<> wrote:
> On Mon, Aug 28, 2017 at 6:14 PM, Mathias Nyman
> <> wrote:
>> On 28.08.2017 12:29, Greg KH wrote:
>> Adding more people who were involved in the original patch.
>> Users are now seeing the unresponsive USB2 ports with Promontory hosts.
>> Is there any update on a better way to solve the original issue.
>> To me a "dead" USB2 port seems like a much worse issue for a user
>> than a BIOS disabled port waking up on plug/unplug (wake on
>> connect/disconnect),
>> so I'm myself in favor of doing this revert.
> At least I can't find "Disable USB2" on my ASUS PRIME B350M-A, so the
> new behavior is quite surprising.
>> But there was a strong push from Promontory developers to get the original
>> fix in,
>> and I would like to get some comment from them before I do anything about
>> it.
> You looped them to the mail thread which I reported the regression two
> weeks ago, and there is no response since then...

Still no response from AMD and ASMedia guys.

I don't like to use out-of-tree patches for myself, but probably it's
the only way here?

>> Thanks
>> -Mathias

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