On 12/15/16 7:08 PM, Chuck Harris wrote:
Sometimes, when one is doing a long run that goes past the
usual power save times, the USB port will shut itself off.
I believe that most motherboards have a setting in the BIOS
that controls the ability of the BIOS to power the USB port
down during quiet times.
More likely the OS configures the USB hardware. On Win 7 (but probably
also anything from WinXP on, if not before) there's a whole bunch of
command line tools (or you can use Device Manager) to deal with the
incredible complex power state behavior of USB devices, and more
particularly hubs.
devcon is the command line tool here
http://support.microsoft.com/kb/311272
More info at:
http://www.fixedbyvonnie.com/2013/11/fix-usb-root-hub-power-management-issue-windows-7/
and at:
http://support.microsoft.com/kb/817900
devcon is the command line tool here
http://support.microsoft.com/kb/311272
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