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J13 USB header enablement

J13 USB header

The J13 USB header found on apu3-6 boards is disabled by default in some BIOS versions (this was last reported for version 4.12.0.4). If you encounter problems with USB peripherals (e.g. watchdog module) connected to this header, you may use sortbootorder to enable the EHCI controller functionality.

How to enable

  • Enter sortbootorder in the SeaBIOS menu while booting by choosing the option payload [setup] in the boot menu
  • Check the state of the EHCI controller - if it says Disabled, enable it using the H key
  • Save and exit sortbootorder by pressing s.