USB keyboard can NOT wakeup from S3( suspend to RAM )

[jingyun@cpu-os.ac.cn (jingyun at cpu-os.ac.cn)]

Hi, Greg

Thanks for your time.
First of all, if I do NOT hit the keyboard during the suspend.
Then my keyboard CAN wake the system up from suspend.
This has rule out that my system does NOT support USB wakeup. Right ?

Thanks again.

Jim


 
From: Greg KH
Date: 2017-08-30 14:09
To: jingyun at cpu-os.ac.cn
CC: kernelnewbies
Subject: Re: USB keyboard can NOT wakeup from S3( suspend to RAM )
On Wed, Aug 16, 2017 at 06:03:22PM +0800, jingyun at cpu-os.ac.cn wrote:
> hi, there
> 
> thx in advance;
> 
> I encounter a strange (maybe) bug:
> During the suspending of my linux box(which runs debian 9), I hit the key of
> the USB interfaced keyboard;
> after making sure the box enter suspend state  for a while ( which I can tell
> from the power LED blinks), 
> I can NOT wakeup it by hit that keyboard any more.
> But if I do NOT hit the key during the suspending, I CAN wake it up by hitting
> the keyboard.
> 
> After that I tried Ubuntu 16.04(runs 4.4 version kernel ) and Ubuntu 14.04 (
> 3.13 kernel).
> And I found all of them got the same problem;
> 
> Do not know if this is the right place to ask. Just a try.
 
Sounds like your system does not support USB wakeup, which is very
common, sorry.
 
good luck!
 
greg k-h
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