diff options
Diffstat (limited to 'docs/install/c201.md')
| -rw-r--r-- | docs/install/c201.md | 47 |
1 files changed, 20 insertions, 27 deletions
diff --git a/docs/install/c201.md b/docs/install/c201.md index 2e1d23b8..bcacd75b 100644 --- a/docs/install/c201.md +++ b/docs/install/c201.md @@ -1,5 +1,6 @@ --- title: ASUS Chromebook C201 installation guide +x-toc-enable: true ... These instructions are for installing Libreboot to the ASUS Chromebook @@ -25,26 +26,14 @@ source code is made available by Google: It is not distributed along with Libreboot yet. However, it is preinstalled on the device, with ChromeOS. -Installing Libreboot internally requires sufficient privileges on the -system installed on the device.\ -When the device has ChromeOS installed (as it does initially), it is -necessary to gain root privileges in ChromeOS, to be able to access a -root shell. - -- [Gaining root privileges on ChromeOS](#root_chromeos) -- [Preparing the device for the installation](#preparing_device) - - [Configuring verified boot - parameters](#configuring_verified_boot_parameters) - - [Removing the write protect - screw](#removing_write_protect_screw) -- [Installing Libreboot to the SPI flash]() - - [Installing Libreboot internally, from the - device](#installing_libreboot_internally) - - [Installing Libreboot externally, with a SPI flash - programmer](#installing_libreboot_externally) -- [Debian GNU+Linux is recommended for this device](#debian) +Installing Libreboot internally requires sufficient privileges on the system +installed on the device. When the device has ChromeOS installed (as it does +initially), it is necessary to gain root privileges in ChromeOS, to be able to +access a root shell. Gaining root privileges on ChromeOS +-------------------------------- + In order to gain root privileges on ChromeOS, developer mode has to be enabled from the recovery mode screen and debugging features have to be enabled in ChromeOS. @@ -75,7 +64,7 @@ Before installing Libreboot on the device, both its software and hardware has to be prepared to allow the installation procedure and to ensure that security features don't get in the way. -Configuring verified boot parameters {#configuring_verified_boot_parameters} +Configuring verified boot parameters ------------------------------------ It is recommended to have access to the [developer mode @@ -89,7 +78,7 @@ parameters](../depthcharge/#configuring_verified_boot_parameters): Those changes can be reverted later, when the device is known to be in a working state. -Removing the write protect screw {#removing_write_protect_screw} +Removing the write protect screw -------------------------------- Since part of the SPI flash is write-protected by a screw, it is @@ -111,7 +100,7 @@ screw](images/c201/wp-screw.jpg)](images/c201/wp-screw.jpg) The write protect screw can be put back in place later, when the device is known to be in a working state. -Installing Libreboot to the SPI flash {#installing_libreboot_spi_flash} +Installing Libreboot to the SPI flash ===================================== The SPI flash (that holds Libreboot) is divided into various partitions @@ -119,7 +108,7 @@ that are used to implement parts of the CrOS security system. Libreboot is installed in the *read-only* coreboot partition, that becomes writable after removing the write-protect screw. -Installing Libreboot internally, from the device {#installing_libreboot_internally} +Installing Libreboot internally, from the device ------------------------------------------------ Before installing Libreboot to the SPI flash internally, the device has @@ -131,16 +120,20 @@ transferred to the device. The following operations have to be executed with root privileges on the device (e.g. using the *root* account). In addition, the **cros-flash-replace** script has to be made executable: + # chmod a+x cros-flash-replace The SPI flash has to be read first: + # flashrom -p host -r flash.img\ + **Note: it might be a good idea to copy the produced flash.img file at this point and store it outside of the device for backup purposes.** Then, the **cros-flash-replace** script has to be executed as such: # ./cros-flash-replace flash.img coreboot ro-frid + If any error is shown, it is definitely a bad idea to go further than this point. @@ -149,11 +142,11 @@ The resulting flash image can then be flashed back: # flashrom -p host -w flash.img You should also see within the output the following:\ -**"Verifying flash\... VERIFIED."** +**"Verifying flash... VERIFIED."** Shut down. The device will now boot to Libreboot. -Installing Libreboot externally, with a SPI flash programmer {#installing_libreboot_externally} +Installing Libreboot externally, with a SPI flash programmer ------------------------------------------------------------ Before installing Libreboot to the SPI flash internally, the device has @@ -184,12 +177,14 @@ host (e.g. using the *root* account). In addition, the The SPI flash has to be read first (using the right spi programmer): # flashrom -p *programmer* -r flash.img + **Note: it might be a good idea to copy the produced flash.img file at this point and store it outside of the device for backup purposes.** Then, the **cros-flash-replace** script has to be executed as such: # ./cros-flash-replace flash.img coreboot ro-frid + If any error is shown, it is definitely a bad idea to go further than this point. @@ -199,7 +194,7 @@ programmer): # flashrom -p *programmer* -w flash.img You should also see within the output the following:\ -**"Verifying flash\... VERIFIED."** +**"Verifying flash... VERIFIED."** The device will now boot to Libreboot. @@ -211,8 +206,6 @@ See <https://wiki.debian.org/InstallingDebianOn/Asus/C201>. Copyright © 2015 Paul Kocialkowski <contact@paulk.fr>\ - - Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License Version 1.3 or any later version published by the Free Software Foundation |