After waking from suspend, USB devices are not recognized (Ubuntu 17.10)

[Michael Shiloh]

Very interesting. After removing TLP the problem seems to have gone away. I
am now able to enjoy USB peripherals again. Thanks!

I'd love to understand why, though.

On Fri, Nov 24, 2017 at 11:45 AM, Michael Shiloh <
michaelshiloh1010 at gmail.com> wrote:

> Not powertop, but yes tlp. Very interesting. I will uninstall and see if
> that solves the problem.
>
> Another observation I just made: If I suspend the laptop with USB devices
> plugged in, they are still detected when I restart.
>
> I guess I could work around by leaving some small USB device plugged in
> (one of those wireless mouse things) but obviously that's a real hack.
> Still, the observation may be a hint as to what's going on or what I might
> look at next.
>
> I will disable TLP and report back.
>
> Michael
>
> On Fri, Nov 24, 2017 at 2:38 AM, Efraim Flashner <efraim at flashner.co.il>
> wrote:
>
>> On Thu, Nov 23, 2017 at 06:15:03PM +0400, Michael Shiloh wrote:
>> > Hi,
>> >
>> > 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.
>> >
>>
>> Do you run powertop or tlp on your laptop? Sometimes those can cause
>> issues with the USB ports.
>>
>> --
>> Efraim Flashner   <efraim at flashner.co.il>   אפרים פלשנר
>> GPG key = A28B F40C 3E55 1372 662D  14F7 41AA E7DC CA3D 8351
>> Confidentiality cannot be guaranteed on emails sent or received
>> unencrypted
>>
>
>
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