[sf-lug] After waking from suspend, USB devices are not recognized (Ubuntu 17.10)

[Michael Shiloh]

Thought I'd update the list with what seems to be the solution in case
anyone ever searches this list with the same problem:

A friend suggested I remove tlp. After removing TLP the problem seems to
have gone away. I am now able to enjoy USB peripherals again.

I'd love to understand why, though.

Thanks everyone for your tips,
Michael

On Thu, Nov 23, 2017 at 11:19 PM, Michael Shiloh <
michaelshiloh1010 at gmail.com> wrote:

> Hi Bobbie,
>
> Thanks for the tip. Unplugging and plugging in again seems to have no
> effect. Once it's dead, it stays dead until I reboot.
>
> Michael
>
> On Thu, Nov 23, 2017 at 10:45 PM, Bobbie Sellers <
> bliss-sf4ever at dslextreme.com> wrote:
>
>>
>>
>> On 11/23/2017 10:28 AM, Michael Shiloh wrote:
>>
>>> Interesting observation Akkana. In my case unplugging and plugging has no
>>> effect, but your suggestion of researching Lenovo power management is a
>>> great idea.
>>>
>>> Thanks,
>>> Michael
>>>
>>> On Thu, Nov 23, 2017 at 9:04 PM, Akkana Peck <akkana at shallowsky.com>
>>> wrote:
>>>
>>> Michael Shiloh writes:
>>>>
>>>>> I noticed that my old mouse didn't work all the time, and figured it
>>>>> was
>>>>> time to replace the mouse. Then I had trouble programming some
>>>>> Arduinos,
>>>>> and figured I had a bad Arduino. It wasn't until my system failed to
>>>>> see
>>>>>
>>>> a
>>>>
>>>>> thumb drive that I finally realized the common element here: After
>>>>> waking
>>>>> from suspend, no devices plugged in to the USB ports are recognized.
>>>>>
>>>> [ ... ]
>>>>
>>>>> $ lspci -nnk | grep -A2 USB
>>>>> 00:14.0 USB controller [0c03]: Intel Corporation Sunrise Point-LP USB
>>>>> 3.0
>>>>> xHCI Controller [8086:9d2f] (rev 21)
>>>>>      Subsystem: Lenovo Sunrise Point-LP USB 3.0 xHCI Controller
>>>>>
>>>> [17aa:2238]
>>>>
>>>> Don't know how much this will help, but I had weird sporadic
>>>> problems with an external mouse on my Lenovo X201. After suspend it
>>>> would (seemingly) randomly stop working. I finally narrowed it down:
>>>> When it was docked but running on battery power, and only after a
>>>> suspend, the machine would stop listening to the mouse after a
>>>> period of inactivity. Unplugging and replugging the mouse would fix it,
>>>> as would clicking a mouse button, but simply moving the mouse did
>>>> nothing. I think it's some kind of Lenovo power management cleverness
>>>> (not), and since I notice you're also on Lenovo, it might be related.
>>>>
>>>> I never did find a fix, so now I keep the X201 plugged in when it's
>>>> in the dock using the external mouse. Sounds like your problem is
>>>> worse, but knowing that Lenovo plays funky power management games
>>>> might help in searching for a solution.
>>>>
>>>>          ...Akkana
>>>>
>>>>             I think the USB disconnect is a common phenomena as I
>> observe it here in the
>> case of my mouse and to a lesser degree the keyboard which are both
>> plugged into
>> a 3 port USB un-powered USB hub which is plugged into the computer. I see
>> this
>> most often with the mouse and find that unplugging it when it fails to
>> respond
>> and re-plugging it may restore function either immediately or after a few
>> moments.
>> I also have a mouse pad on the laptop's keyboard which remains usable.
>> This was observed on the Pavilion notebook as well as the Dell laptop.
>>
>>             bliss
>>
>>
>>
>>
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>>
>
>
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