Joinsubscribers and get a daily digest of news, geek trivia, and our feature articles. The following guide is intended for those that have installed a different BIOS and operating system altogether. That script, if you recall from our guidecreates a backup copy of your BIOS, making it easy to restore. If you left the write protect screw off, you can continue. Click the Wi-Fi icon at the top right corner of your screen and connect to your Wi-Fi network when you reach the desktop.
You now now run the same script you ran earlier. Open a Terminal window in Ubuntu and paste the following command, pressing Enter afterwards. Just tell the script you do not have a firmware backup file when it asks. The process should complete successfully. Launch the app and connect a USB drive. This USB drive will be erased as part of this process. You can pick it from the list or just enter the codename. Go through Chromebook Recovery Utility wizard. If your Chromebook has an SD card slot, you can also use this utility to place the recovery media on an SD card instead.
When the tool finishes creating recovery media, you can remove the USB drive from your computer and connect it to your Chromebook.
With your Chromebook still powered off, press and hold the Esc and Refresh keys the Refresh key is where the F3 key would be on a normal keyboard. Press the Power button while holding these keys and then let go of the power button.
Release the Esc and Refresh keys when you see a message appear on your screen. Connect the USB drive you created to your Chromebook. Your Chromebook will automatically detect the recovery media and use it to restore your device.
Ensure the Chromebook is plugged in and allow it to automatically restore the operating system. Ensure you only have the one USB drive connected to avoid confusing the system.
Your Chromebook will then restart automatically. Sign in and set up Chrome OS normally. Paste the following command and press Enter to download and run the firmware script one last time:. At this point, you may or may not want to disable Developer Mode.
Your Chromebook will wipe its internal drives and re-enable OS verification, which prevents you or malware from modifying the system partition and operating system files. You may want to re-enable the BIOS write protection, too. Your Chromebook will be back to the same state it was in when you bought it, running the original BIOS and protecting it from modification.
Just do the same thing you did when you removed the screw. Turn the Chromebook over and unscrew the bottom.
Locate the screw hole you unscrewed the BIOS write protect screw from previously. Take the exact same screw you unscrewed earlier and screw it back into the hole. Your Chromebook will be in the same state it was in when you purchased it. The Best Tech Newsletter Anywhere. Joinsubscribers and get a daily digest of news, comics, trivia, reviews, and more. Windows Mac iPhone Android. Smarthome Office Security Linux. The Best Tech Newsletter Anywhere Joinsubscribers and get a daily digest of news, geek trivia, and our feature articles.
Skip to content.Contributions welcome! Please check the board documentation or ask on the mailing list if unsure of the status. You just have to run the following in your coreboot checkout:. There's also a cgit facility to browse the latest source code online. The resulting coreboot. SeaBIOS can read the coreboot flash filesystem and extract files.
For machines without a VGA adapter, please follow the sgabios instructions below. This information can be found from lspci :. Use the following to add a compressed option ROM instead:. After the above is done, one can write the coreboot. If the target machine does not have a VGA adapter, then one should install sgabios.
When using sgabios, all the characters that SeaBIOS writes to the screen will be seen twice — once from SeaBIOS sending the character to the serial port and once from sgabios forwarding the character. This could be done like that:. Coreboot can initialize the GPU of some mainboards. After initializing the GPU, the information about it is passed to the payload. For example:. One should note that many bootloaders expect some vbios functionality which this vgabios does not provide.
To overcome this issue one can use a bootloader not requiring this functionality. For instance grub works fine if configured in textmode. To enable this, add the JPEG file to flash with the name bootsplash. The size of the image determines the video mode to use for showing the image. Make sure the dimensions of the image exactly correspond to an available video mode eg, x, or xotherwise it will not be displayed.
SeaBIOS will show the image during the wait for the boot menu if the boot menu has been disabled, users will not see the image. By default, the boot menu prompt and thus graphical image is shown for 2. This can be customized via a configuration parameter. It supports most common JPEGs, but does not support all possible formats. Please see the Trouble reporting section if a valid image isn't displayed properly. However, compression won't significantly reduce gpxe's size as it implements its own compression.
To add a payload, build the corresponding. During boot, one can press the ESC key to get a boot menu. It is possible to embed an image of a floppy in flash. This is mainly useful for legacy software such as DOS utilities. Both uncompressed and LZMA compressed images are supported. Several floppy formats are available: K, 1. SeaBIOS expects the uncompressed images size to be equal to the ones just mentioned. Else, given enough debug, it will complain with: "No floppy type found for ramdisk size".
The floppy image will appear as writable to the system, however all writes are discarded on reboot. The reserved memory is then no longer available for OS use, so this feature should only be used when needed.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.
If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. With the separation of hardware initialization and later boot logic, coreboot can scale from specialized applications that run directly firmware, run operating systems in flash, load custom bootloaders, or implement firmware standards, like PC BIOS services or UEFI.
This allows for systems to only include the features necessary in the target application, reducing the amount of code and flash space required. After the basic initialization of the hardware has been performed, any desired "payload" can be started by coreboot. If you want to test coreboot without any risks before you really decide to use it on your hardware, you can use the QEMU system emulator to run coreboot virtually in QEMU.
The copyright on coreboot is owned by quite a large number of individual developers and companies. Please check the individual source files for details. Some files are licensed under the "GPL version 2, or any later version ", and some files are licensed under the "GPL, version 2".
For some parts, which were derived from other projects, other GPL-compatible licenses may apply. Skip to content.
Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up. No description, website, or topics provided.Why Use a Chromebook
Branch: 4. Find file. Sign in Sign up. Go back. Launching Xcode If nothing happens, download Xcode and try again. Latest commit. Latest commit aa3 Jan 12, Payloads After the basic initialization of the hardware has been performed, any desired "payload" can be started by coreboot.
Supported Hardware coreboot supports a wide range of chipsets, devices, and mainboards. Two options: use our toolchain eg. This makes the resulting coreboot images licensed under the GPL, version 2. You signed in with another tab or window.
Reload to refresh your session. You signed out in another tab or window. Nov 19, This page is a collection of links, information, tips, and guides related to running Kodi on Chromebox mini PCs. Model-specific features are enumerated below. Chromeboxes are small, lightweight x PC that natively runs ChromeOS, but with a few simple tweaks, has the capability to run any Linux-based OS some models can also run Windows 8.
A simplified overview of the ChromeBox boot process is shown here click for full-size : This wiki page will guide you through the steps necessary to put the ChromeBox into Developer Mode and set up Kodi in either a dual boot or standalone non-ChromeOS configuration.
Haswell Chromeboxes were first released in Marchand quickly became the low-cost x86 platform of choice due to the combination of the speed U-series Celeron CPU and capable integrated GPU. Capability wise, the Haswell ChromeBoxes fully support hardware accelerated H. HiP H. Broadwell Chromeboxes were announced in the Spring ofbut not available to purchase until the Fall.
Even now, their availability is still limited to the Haswell boxes, which have displayed remarkable staying power given the release of replacement models. HEVC is still software decoded, making 4K output a spec-sheet checkmark for the most part. Even still, there likely better options available at a lower price point. Currently, Legacy Boot Mode is broken in Google's stock firmware, so dual booting is not functional at this time.
Disabling the write protect is also necessary for standalone setups so that the stock firmware can be replaced with a custom version. With the device powered off:. Afterwards, the ChromeBox will be in developer mode vs verified boot modeand the developer boot screen shown below will be displayed at each boot. Note: The recovery button and booting to recovery mode are a function of the stock firmware. If you've flashed a custom firmware on your box either as part of a standalone setup or otherwisethe recovery button has no function and the ChromeOS recovery mode doesn't exist.
The developer boot screen has a warning about OS verification being off. The ChromeBox must remain in developer mode, else you will potentially have to redo the setup from the beginning. A factory reset is not needed for a standalone setup, but must be performed prior to any dual-boot re install. If one USB stick doesn't work, try another.At startup, the Firmware Utility Script will automatically detect the device, OS, and current firmware type, and restrict the available menu options based on this information.
An override is available for users who really know what they are doing or really want to try and brick their device - though the script will do its best to try and prevent you from doing this. Because these operations are mostly being done to normally read-only parts of the firmware, the firmware write protect will need to be removed for most of the script's functions.
This is documented for each function below, and the script will likewise check the write-protect state for each function that requires it to be disabled.
Firmware Utility Script, on device with stock firmware and WP enabled. In both screenshots above, only the script functions available for the device and current firmware are enabled cyan text ; unavailable functions are in grey. Features which require the firmware WP to be disabled are clearly labeled as such, along with the ability of that function to be used based on the current WP state.
Changing either of these options requires re-running this script function.
Chromebook Coreboot Installation
As this is a full replacement firmware, the script will offer users the option to back up their stock firmware on USB. If PXE support is enabled, it can also be set to be the default boot device. As before, changing any of these boot options requires re-running this script function. It will also persist the VPD region across firmware updates, so this is all transparent to the user. This script function allows one to change the timeout for the Developer Mode boot screen 2s or 30s and the default boot target ChromeOS or Legacy Boot Mode.
This is normal and no cause for alarm, though you'll need to re-run the script and reset them to the Factory Default before exiting Developer Mode should you want to do so. HWIDs aren't unique, so any valid one will do. Note: If you restored your stock firmware using the option from this script, it is not necesary to set the HWID afterward. This function removes the ChromeOS bitmap image files used to display the Developer Mode and Recovery boot screens, leaving you with a simple black screen with white terminal text -- much easier on the eyes, esp when booting in a darkened environment.
Note: ChromeOS updates might occasionally restore the missing bitmaps, so if you're still running ChromeOS you may need to re-run this function as needed. Credit to Joshua Stein for bringing this to my attention via his blog which I stumbled upon somehow.
This script function will restore the stock firmware, preferably from a backed-up copy on USB.
For Chromeboxes, if the current fimware contains an embedded VPD region, it will be extracted and merged before flashing. Support for flashing shellball ROMs for additional devices is planned for the near future. After restoring the stock firmware, you will need to reboot and reinstall ChromeOS from the recovery media. This will delete all bootorder entries stored in NVRAM, and they will be created again on the next boot or next time grub is updated.Caution: Modifications you make to the system are not supported by Google, may cause hardware, software or security issues and may void warranty.
Enabling Developer mode is the first step to tinkering with your Chromebox. With Developer mode enabled you can do things like poke around on a command shell as root if you wantinstall Chromium OS, or try other OS's.
Note that Developer mode turns off some security features like verified boot and disabling the shell access. If you want to browse in a safer, more secure way, leave Developer mode turned OFF. Note: Switching between Developer and Normal non-developer modes will remove user accounts and their associated information from your Chromebox. By default, USB booting is disabled. Once you are in Dev-mode and have a root shell, you can run:.
Like USB boot, support for this is disabled by default. You need to get into Dev-mode first and then run:. To leave Dev-mode and go back to normal mode, just follow the instructions at the scary boot screen.
It will prompt you to confirm. There's no way to enter Dev-mode programmatically, and just seeing the Recovery screen isn't enough - you have to use the three-finger salute which hard-resets the machine first. That's to prevent a remote attacker from tricking your machine into dev-mode without your knowledge. If you do get into such a situation:.
The board name for the HP Chromebox is "zako". To boot your image you will first need to enable booting developer signed images from USB or SD card. If all goes well you should see a "Chromium OS" logo screen. Use a recovery image if you want to get back to a stock Chrome OS build.
The Chromium Projects. Search this site. Chromium OS. Quick links Report bugs. Other sites Chromium Blog. Google Chrome Extensions.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. With the separation of hardware initialization and later boot logic, coreboot can scale from specialized applications that run directly firmware, run operating systems in flash, load custom bootloaders, or implement firmware standards, like PC BIOS services or UEFI.
This allows for systems to only include the features necessary in the target application, reducing the amount of code and flash space required.
After the basic initialization of the hardware has been performed, any desired "payload" can be started by coreboot. If you want to test coreboot without any risks before you really decide to use it on your hardware, you can use the QEMU system emulator to run coreboot virtually in QEMU.
The copyright on coreboot is owned by quite a large number of individual developers and companies. Please check the individual source files for details.
Some files are licensed under the "GPL version 2, or any later version ", and some files are licensed under the "GPL, version 2". For some parts, which were derived from other projects, other GPL-compatible licenses may apply.
Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up. No description, website, or topics provided. Branch: 4.
Fast, secure and flexible OpenSource firmware
Find file. Sign in Sign up. Go back. Launching Xcode If nothing happens, download Xcode and try again.
Latest commit. Latest commit aa3 Jan 12,