[mythtv-users] How To Prevent Disabling of USB Devices When Idle

Jay Foster jayf0ster at roadrunner.com
Sat Sep 30 22:59:18 UTC 2017


On 09/30/2017 03:51 PM, Jay Foster wrote:
> On 09/30/2017 05:47 AM, Stephen Worthington wrote:
>> On Fri, 29 Sep 2017 14:42:26 -0700, you wrote:
>>
>>> I have an Intel NUC 7I5BNH as a frontend.  I use an IO Gear wireless
>>> keyboard/mouse with it.  The interface to the frontend is a USB dongle.
>>> When the frontend is idle for enough time, the screen saver kicks in.
>>> Usually, pressing a key or moving the mouse (trackball) will wake up 
>>> the
>>> frontend.  However, if more time passes by, the frontend kernel goes to
>>> sleep too, and no amount of key pressing or mouse moving will wake it
>>> up.  I suspect that the kernel is disabling the USB keyboard/mouse
>>> wireless dongle.  Is there some way to prevent this?
>>> Ubuntu 14.04.
>>> Jay
>> Have you checked your BIOS settings?  The wakeup sources are often
>> configured there.
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> Looking at the BIOS settings for the USB, nothing pops out at me. 
> There is an "USB Legacy" option (enabled) and a Portable Device 
> Charging Mode option (Charging in S3/S4/S5).  Other choices are "Off" 
> and "Charging Only".  Other than that, only an Enable/Disable for each 
> USB port (all enabled).
>
>
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I might have replied too soon.  With some further investigation, I found 
some settings under the Power tab in the BIOS.  I have enabled the "USB 
S4/S5 Power" setting and the "Wake on USB from S5" setting.  I see if 
this helps.




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