Hello coreboot developers,
Here a coreboot user who wishes to boot from an USB-memory-stick. That is in addition to regular boot from internal storage device.
The computer I'm talking about is a Lenovo Thinkpad X230 which does have coreboot installed, it is what I have bought. Payload is grub.
An .iso is fetched from Internet and `dd` to USB-memory-stick. The USB-thumbdrive is then inserted in the X230, on the left side, in the USB-slot closest to user[1].
Upon power-on is a grub menu shown[2]. Default menu entry has description "Load operating system", beneat is `search_grub ahci` and does indeed load and start Linux. (in ohter words: payload came alive)
However the other boot menu entries[3] don't work. It is the reason why I'm seeking your advice.
When I active menu entry 'Search ISOLINUX menu (USB)', which has grub command 'search_isolinux usb', screen goes shortly black and then the main grub menu re-appears. As if the coreboot payload grub wants to tell "nothing found".
For the other boot menu entries I also get "nothing found".
What to do to make coreboot grub accepting USB image?
Groeten Geert Stappers
[1] Other USB-slots have also been tried. Only with the "front-left-USB-slot" do I see a blinking activity LED of the USB-memory-stick. [2] Other power-up-messages might have been printed, but the quick appearance of the grub menu overwrites then. [3] "Poweroff" and "Reboot" are not **boot** menu entries.