Old title: Windows 10: USB 3.0 ports inop after sleep
Windows 10 upgrade complete on Z77X chipset system. Only one issue remains: after entering sleep mode, the USB 3.0 ports on the back panel do not work with USB 3.0 devices upon wake. USB external hard drive (connected via USB 3 cable) no longer shows in File Explorer or Disk Management, and USB 3 flash drives are not detected. However, USB 2.0 devices plugged into the ports are still recognized.
The 3.0 functionality returns after a Windows restart, but consistently fails after the computer enters and then wakens from sleep mode. Have already worked on USB power options, reinstalled (latest) drivers, etc. No issues are apparent in Device Manager.
FWIW, system has two front panel 3.0 ports, and they work normally after sleep mode, but that's a lousy place to plug in an external USB HDD.