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 <[email protected]> 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 > [email protected] > > _______________________________________________ > PLUG mailing list > [email protected] > http://lists.pdxlinux.org/mailman/listinfo/plug > _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
