[coreboot] CTL Chromebook info

Stefan Reinauer reinauer at google.com
Thu Jul 10 21:12:24 CEST 2014

Hi Richard,

* Richard A. Smith <richard at laptop.org> [140710 19:45]:
> http://ctl.net/education-chromebook/
> Anyone know if these run coreboot and how locked down they are?
All new Chrome OS devices run coreboot and depthcharge, a payload that
implements a verified boot process. Chrome OS devices with an Embedded
Controller also run Open Source EC firmware.

The devices have a part of their firmware write protected (root of
trust) and the RW firmware portions are cryptographically checked.
Flash write protection can be circumvented by opening the device and
removing the "write protect screw".

In "Normal Mode" Chrome OS devices will only run Chrome OS signed by
Google. In "Developer Mode" (built-in "jailbreak" mode) you can install
your own software (and run SeaBIOS or any other payload)

Please let me know if you have further questions.


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