EC firmware update
coreboot has been developed and tested in combination with Embedded Controller firmware version 1.07.05 and 1.07.08. Therefore, before flashing coreboot, it's necessary to first check and update/downgrade the EC firmware to one of these versions.
At the moment, the EC firmware version can only be checked while running stock Insyde BIOS firmware.
Check EC firmware version
To check the current EC firmware version while running stock Insyde BIOS, run the following command:
# dmidecode -t 0 | grep `Firmware Revision` Firmware Revision: 7.5
Firmware Revision: 7.5 indicates that the EC is running firmware
version 1.07.05, which is one of the supported versions. If the version is
different, it is necessary to upgrade (or downgrade) the EC firmware to a
Update EC firmware
Updating the EC is performed with the
EcFlash EFI application.
- Download EC firmware 1.07.05
- Format a USB stick to FAT32
- Extract the update to root directory of the USB stick
- Plug the stick into the laptop
- Boot the laptop into the UEFI shell
- Open the USB stick, e.g. by running the command
FS0:- one of the filesystems in the FS list will be the USB stick
- Run the command
EcFlash.NSHto update the EC
The laptop will update the EC and reboot automatically.
EcFlash can also be
used while running