[time-nuts] LH Z3801 and XP stalling

[Chuck Harris]

A customer's 'doze 7 computer got auto updated to 'doze 10,
and with that upgrade came a usb hub that timed out, turning
itself off.... the only problem was, the keyboard and
mouse were on that hub, leaving no way to signal the computer
to turn the hub back on.  Ultimately, the customer found that
if he unplugged the monitor, plug and pray would restore things.
For a while.

-Chuck Harris

jimlux wrote:
> 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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