USB to Serial stops working in Windows 10

toddrebhanMember

With many new Windows 10 computers the USB ports are set to hibernate by default to save power.

When configuring a new windows 10 computer for timing and to make sure the USB hubs are not set to go into sleep mode do the following.

Go to Device Manager and scroll down to "Universal Serial Bus Controllers". Open that and there will be a list of USB hubs. One at a time double click on each USB Hub and select the Power Management Tab and make sure the check box in front of "Allow this computer to turn off this device to save power" is unchecked. Then click OK.

Check your power management setting also. I set all mine to "Never"

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12/10/196:41 AM

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patmacdonaldMember

This is a good tip, and can be done with other things too, like your ethernet adapter.

12/10/198:14 AM

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cottageguyMember

I've had SplitSecond on Timer A and Timer B and my newer computer Freeze on me. They are all windows 10. I'm going to guess this must be the issue. I can't imagine I have a bad USB to serial cable. The event log on my new computer does show 1 critical message related to ACPI. All of my diagnostics pass and I've had no issues. This is the message I get.

: The embedded controller (EC) did not respond within the specified timeout period. This may indicate that there is an error in the EC hardware or firmware or that the BIOS is accessing the EC incorrectly. You should check with your computer manufacturer for an upgraded BIOS. In some situations, this error may cause the computer to function incorrectly.

2/17/206:05 PM

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