Difference between revisions of "Support/Broadwell"

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Intel processors with Broadwell cores are very popular in newer higher-end ChromeOS devices.
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Broadwell core Intel processors are popular in higher end 2014 and 2015 Chromebooks.
  
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Factory firmware support for coreboot and SeaBIOS is spotty, but custom firmware is also available for all Broadwell models from John Lewis: https://johnlewis.ie/custom-chromebook-firmware/rom-download/.
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Support for Broadwell Chromebooks has been implemented in upstream Linux with aplomb, so you should be able to run any recent Linux distribution you please with little to no friction.
  
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Only one firmware update option is currently available for Broadwell models:
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Factory firmware support for coreboot and SeaBIOS is generally good on Broadwell models (with a few bugs), but custom firmware is also available -- see [[Firmware]].
  
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# '''RW_LEGACY'''
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=== GRUB bug with some factory firmwares ===
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#* Leaves all stock functionality intact, including the white "OS verification is OFF" screen
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* One firmware bug relates to video init in early boot, which prevents the display of the GRUB boot menu. This can be worked around with GRUB settings:
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#* Allows device to dual-boot GalliumOS alongside ChromeOS
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** # Add settings to '''<code>/etc/default/grub</code>'''
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#* Some models ship with this feature enabled and including a working SeaBIOS
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** #* <code>GRUB_TERMINAL=console</code>
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#* On some models, includes bugfixes and enables additional functionality such as booting from SD card/eMMC
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** #* <code>GRUB_GFXMODE=1024x768</code>
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** # Run '''<code>sudo update-grub</code>'''
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== Model-Specific Notes ==
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* This bug is not present on full custom [[Firmware]].
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=== Acer C740, Acer C910 and Acer CB5-571 (auron_paine and auron_yuna) ===
 
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* '''Full ROM''' flash is possible
 
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A full ROM is available from CoolStar: https://docs.google.com/document/d/1nFZmoRzQ03btPCGVSa4ku6JPQik-SxD__zOd1CoB2yg/edit
 
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(for running Linux, you can follow the flashing instructions and install Linux instead of Windows)
 
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#* Bypasses the white "OS verification is OFF" screen
 
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#* Installs a complete ROM containing a coreboot build and a working SeaBIOS
 
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#* Removes the ability to run ChromeOS natively, creating a small risk of bricking your device
 
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#* Will wipe out all product data
 
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#* This option is the most invasive and may include bugs or idiosyncrasies that the stock firmware does not
 
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#* Fixes Graphics issues associated with the RW_LEGACY
 
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#* Fixes several issues related to ACPI
 
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#* Allows booting Linux, Windows and even Mac OS!
 

Latest revision as of 20:45, 10 June 2019

Broadwell core Intel processors are popular in higher end 2014 and 2015 Chromebooks.

Support for Broadwell Chromebooks has been implemented in upstream Linux with aplomb, so you should be able to run any recent Linux distribution you please with little to no friction.

Factory firmware support for coreboot and SeaBIOS is generally good on Broadwell models (with a few bugs), but custom firmware is also available -- see Firmware.

GRUB bug with some factory firmwares

  • One firmware bug relates to video init in early boot, which prevents the display of the GRUB boot menu. This can be worked around with GRUB settings:
    • # Add settings to /etc/default/grub
    • #* GRUB_TERMINAL=console
    • #* GRUB_GFXMODE=1024x768
    • # Run sudo update-grub
  • This bug is not present on full custom Firmware.
Retrieved from "https://wiki.galliumos.org/index.php?title=Support/Broadwell&oldid=1390"