[mythtv-users] How To Prevent Disabling of USB Devices When Idle
jayf0ster at roadrunner.com
Sun Oct 8 14:15:57 UTC 2017
On 09/30/2017 05:37 PM, Nick Morrott wrote:
> On 29 September 2017 at 22:42, Jay Foster <jayf0ster at roadrunner.com> 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?
> Disabling power saving of individual USB devices is possible (and
> necessary with some IR receivers too, IME).
> You can follow a clear write-up here:
> It boils down to poking power/control for the correct USB device
> (under /sys/bus/usb/devices) and changing its status from 'auto'
> (kernel can autosuspend the device) to 'on' (device is always on).
> It may also be necessary to ensure that utilities like
> laptop-mode-tools and powertop are not overwriting settings you are
> manually applying.
> mythtv-users mailing list
> mythtv-users at mythtv.org
> MythTV Forums: https://forum.mythtv.org
When I checked the power/control setting for the keyboard/mouse USB
device, it was already set to "on" and the problem still happens. I
have added setting "usbcore.autosuspend=-1" on the kernel boot command
line as described here
I hope this will help.
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