According with the Rack Matrix BLOG article
PC Engines APU motherboard BIOS update describing how to update the PC Engines APUx BIOS.
We update the SD image with last BIOS 4.9.0.7 and 4.0.27 for legacy released at 2019-07-09 and can be download
hereV4.9.0.7
release date 2019-07-09
List of change- Fixed/added:
- rebased with official coreboot repository commit c32ccb7
- prepared integration of tianocore payload allowing to boot UEFI aware systems
- removed incorrectly assigned clock request mappings
- disabled IPv6 in iPXE that often caused the dhcp/autoboot command to time out
- updated SeaBIOS to rel-1.12.1.3
- updated sortbootorder to v4.6.15
- Known issues:
- some PCIe cards are not detected on certain OSes and/or in certain mPCIe slots
- booting with 2 USB 3.x sticks plugged in apu4 sometimes results in detecting only 1 stick
- certain USB 3.x sticks happen to not appear in boot menu
- booting Xen is unstable
- watchdog cannot be enabled on apu3
