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authorDenis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>2022-05-07 00:04:48 +0200
committerDenis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>2022-05-07 00:16:05 +0200
commit629631128e1f9adcd6aae5b064190a99d4f0b829 (patch)
tree8862b2014905ff8b8c07f86bd97748e9f0041e41 /libre-testing/flex
parentde474fc049b8ea9dc9e9756ca73b26d4be31aadf (diff)
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pcr: libreboot-utils: Add spkmodem_recv
When building Coreboot or Libreboot with CONFIG_SPKMODEM, the boot messages data is encoded as sound and sent to the sound card. To receive them you can record them with another computer (and ideally you need an audio cable for that and to make sure that the volume is not too low or not too high), and you can then decode them in real time with a command similar to that one: parec --channels=1 --rate=48000 --format=s16le | spkmodem-recv This also works with grub spkmodem console output. Note that the messages speed is relatively slow, so if you build Coreboot or Libreboot with that option, your boot might take a long time (like 30min for instance) if you have a lot of messages. Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>
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