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

[Michael Shiloh]

Interesting. What's your preferred mechanism for stopping and restarting
BT? I can try the same and see if that works as a workaround.

By the way, I should have said in my original letter that this problem only
appeared after I upgraded to 17.10.

Michael

On Thu, Nov 23, 2017 at 9:39 PM, Ken Shaffer <kenshaffer80 at gmail.com> wrote:

> After suspend, my Lenovo W520 frequently loses bluetooth, which is
> internally connected via USB.  Stopping BT and restarting, gets a new
> USB device/inputxx and things work again.
> Ken
>
> On 11/23/17, 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
> >
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> >
>
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