Difference between revisions of "Support/SandyIvy"

Revision as of 05:16, 2 March 2017

Intel processors with Sandy Bridge and Ivy Bridge cores are only used in a few ChromeOS devices.

Factory firmware support for coreboot and SeaBIOS is limited, but custom firmware is available for all Sandy/Ivy Bridge models from John Lewis: https://johnlewis.ie/custom-chromebook-firmware/rom-download/.

Full firmware for select Sandy/Ivy Bridge models is also available from MrChromebox: https://mrchromebox.tech

There are two firmware update options available:

RW_LEGACY
- Leaves all stock functionality intact, including the white "OS verification is OFF" screen
- Allows device to dual-boot GalliumOS alongside ChromeOS
- Some models ship with this feature enabled and including a working SeaBIOS
- On some models, includes bugfixes and enables additional functionality such as booting from SD card/eMMC
- Sandy/Ivy Bridge: only available for the Google Pixel 2013 (LINK)
Full ROM
- Installs a complete ROM containing a coreboot build and a working SeaBIOS (or Tianocore for UEFI ROMs)
- Bypasses the white "OS verification is OFF" screen
- Removes the ability to run ChromeOS natively, creating a small risk of bricking your device
- Will wipe out all product data
- This option is the most invasive and may include bugs or idiosyncrasies that the stock firmware does not
- Sandy/Ivy Bridge: Enables hardware virtualization extensions and suspend

@@ Line 5: / Line 5: @@
 Full firmware for select Sandy/Ivy Bridge models is also available from MrChromebox: https://mrchromebox.tech
-There are three firmware update options available:
+There are two firmware update options available:
 # '''RW_LEGACY'''
@@ Line 13: / Line 13: @@
 #* On some models, includes bugfixes and enables additional functionality such as booting from SD card/eMMC
 #* '''''Sandy/Ivy Bridge''': only available for the Google Pixel 2013 (LINK)''
-# '''BOOT_STUB'''
-#* Bypasses the white "OS verification is OFF" screen
-#* Removes the ability to run ChromeOS natively, creating a small risk of bricking your device
-#* Leaves the “REFRESH + POWER” functionality of the stock ROM intact
-#** If you engage this key sequence, device will reboot and try to run ChromeOS Recovery (which will fail)
-#** This process will repeat on every boot until you disassemble the device and briefly disconnect the battery
 # '''Full ROM'''
-#* Installs a complete ROM containing a coreboot build and a working SeaBIOS
+#* Installs a complete ROM containing a coreboot build and a working SeaBIOS (or Tianocore for UEFI ROMs)
 #* Bypasses the white "OS verification is OFF" screen
 #* Removes the ability to run ChromeOS natively, creating a small risk of bricking your device