Boot from SD Card?

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1

Hi all,

Firstly, thanks to the developers and this community, in the space of 30 minutes I took a brand new Asus CX1 Chromebook, wiped ChromeOS and had it running Linux Mint 22, everything JUST WORKED. Amazing. Only slight issue was the sound card, but that was solved by installing the ALSA Manager utility in Mint.

Question. Is there a way to get the ‘Full ROM’ UEFI firmware (Coreboot) to boot from an SD card on the in-built SD Card reader? If I put the SD card in a USB reader it works, but just the SD card in the laptop port doesn’t get recognized.

Any ideas?

2

if it doesn’t show up in the boot menu, then it’s a firmware limitation for that device at the moment.

Only thing that can be done to debug the issue is to use a debug build with a SuzyQ cable to try and figure out why it’s not being detected

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3

I am willing to help out with this. I was going to make a cable the other day but didn’t have any 56kOhm resistors in my stash, I’ll order some and get that underway.

Do you have a debug build that I can flash or should I build my own?

4

if you’re able to build your own, that’s best. just add:

CONFIG_CONSOLE_SERIAL=y
CONFIG_EDK2_DEBUG=y

to the config for your board and then build using ./build-uefi.sh <board name>

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5

Just built. Output rom is 16MB is that right?

6

that’s correct

7

thanks for this

8

Any hints on what to look for? Or shall I just dump the whole log somewhere?

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pastebin or attach the log file here, google drive, etc