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.
- 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 theH
key - Save and exit sortbootorder by pressing
s
.