The wiki is being retired!
Documentation is now handled by the same processes we use for code: Add something to the Documentation/ directory in the coreboot repo, and it will be rendered to https://doc.coreboot.org/. Contributions welcome!
- Spkmodem will make your boot an order of magnitude slower, be warned
- On the Lenovo X60 the output stops after the EC is initalized => press the volume up button on your keyboard when that happens, it should restore the logs...
- Don't use gdb trough serial and spkmodem at the same time... you won't be able to connect to the target trough gdb and the computer will be stuck waiting for gdb.
Download grub's trunk:
bzr branch http://bzr.savannah.gnu.org/r/grub/trunk/grub cd grub
Compile the receiver code:
cd util gcc -o spkmodem-recv spkmodem-recv.c
Run it like that if you have pulseaudio:
parecord --channels=1 --rate=48000 --format=s16le | ./spkmodem-recv
Or like that for alsa:
arecord -c 1 -r 48000 -Dplughw:0 -f S16_LE | ./spkmodem-recv
Configure coreboot like that:
Go in console:
[*] spkmodem (console on speaker) console output