[PLUG] Getting up from chair brings desktop out of suspend

[Denis Heidtmann]

I agree with the ESD idea.  I set up my 'scope with an unshielded DMM probe
lead spread across the desk in front of the keyboard.  I can see very fast
events in the few volt range, but what seems to trigger the wake from
suspend are slower, lower events.  No solid correlations, however.  And the
grounding does not seem to help.  Might running the USB cable from the
keyboard to the computer through a toroid help?  (I would need a big toroid
to pass the big USB plug.)

On Wed, Feb 21, 2018 at 1:52 PM, Galen Seitz <galens at seitzassoc.com> wrote:

> On 02/21/2018 01:21 PM, Denis Heidtmann wrote:
>
>> I think you will see in my earlier message that I cannot use the mouse to
>> come out of suspend.  I can drop the thing from a few inches off the
>> desk--no  response.
>>
>
> I vote ESD/EMI.  Can you try maintaining contact with a grounded object
> while rising from the chair?  Say the outer shield of a USB cable that is
> plugged into your computer, for example?
>
> Back when I was using a crappy plastic chair mat, merely leaning back in
> my office chair would sometimes trigger my oscilloscope.  Even with a
> hardwood floor you could be experiencing an ESD event, particularly with
> the low humidity we have right now.
>
>
> galen
> --
> Galen Seitz
> galens at seitzassoc.com
>
> _______________________________________________
> PLUG mailing list
> PLUG at pdxlinux.org
> http://lists.pdxlinux.org/mailman/listinfo/plug
>