If the screen turns off or on during that period, ignore it and make sure you keep all three buttons held down for the whole 10 second period, then release them. Recovery mode: Power + Volume-Up + Volume-Down, hold for 10 seconds.The boot firmware screen is accessible through keyboard shortcuts on devices with keyboards on keyboardless devices, the following methods are supported: Battery cutoff shortcut is supported only on devices with a smart battery (e.g., not Scarlet, Dru).All users can still file feedback via the browser options menu ( Help > Report an issue.). Filing feedback from the power button menu is currently (as of ) only supported on canary (for all users) and dev/beta/stable (for Google employees) release channels.Power + Volume-Up, hold down, remove power for 5 seconds Power button, hold for 3 seconds, select option in menu Note that some of the following behaviors work on convertible devices when used in tablet mode. Below are the shortcuts for performing various system and debugging tasks with only the limited physical buttons and touch screen found on tablets or detachable devices. Without a keyboard, some typical keyboard-based debugging shortcuts can't be supported. Starting in 2018, keyboardless Chrome OS devices are being built, in tablet and detachable form factors. Note: An additional, deeper reset (with forced memory retraining) can be triggered on some devices on the way to recovery mode by holding Left-Shift during the normal recovery sequence (i.e., Left-Shift + Esc + Refresh + Power). You can read up on your particular device under the device-specific developer information table. Older devices have a physical Developer Mode switch.To enter Developer Mode on a Chromebox, first enter recovery mode and press Ctrl + D on the keyboard, then push the physical recovery button on the Chromebox to accept.To enter Recovery Mode, hold down the recovery button and press Power. Some devices do not support Esc + Power + Refresh for entering Recovery Mode: The option crossystem dev_default_boot=usb can be set to override the default boot behavior if no key combination is pressed for 30 seconds.On these devices, the number keys can be used to directly boot the numbered bootloader without going through the menu. 0 through 9: On newer (2019+) platforms, more than one alternative bootloader can be installed and Ctrl + L will show a selection menu.The option crossystem dev_boot_legacy=1 must be set from the command line before this option is available. New alternative bootloaders can be manually installed on the device from Developer Mode. Not all devices are shipped with alternative bootloaders. This may allow booting other Operating Systems more easily. Ctrl + L: Chain-load an alternative bootloader (e.g.The option crossystem dev_boot_usb=1 must be set from the command line before this option is available. Ctrl + U: Boot the system from an external USB stick or SD card.Ctrl + D: Boot the system from the internal disk.From the warning screen, the following keyboard shortcuts are available:.The screen will time out after 30 seconds, playing a warning beep. Devices in Developer Mode will show a warning screen on every boot.Note that Developer Mode disables security features and may leave your device open to attack.
Typically (only?) for chromeboxes with a QWERTY keyboard attached.ĭeveloper mode: To enter Developer Mode, first enter recovery mode, then press Ctrl + D, followed by Enter to accept. Recovery mode: Engage the small Reset pinhole with a paperclip, hit Power and continue engaging Reset for 2 seconds. From here, follow the instructions at to recover your device using external media.Recovery mode: Hold Esc + Refresh and press Power. Overriding the charging port is only supported on Samus.When in Developer mode, you can enable SysRq key combinations as documented in the Linux kernel docs. Alt + Volume-Up is treated as the Magic SysRq key.EC hibernate is supported only on devices with select Embedded Controllers.AP = Application Processor EC = Embedded Controller.Left-Ctrl + Right-Ctrl + Search + (0 or 1 or 2) * Power + Refresh, hold down, remove power for 5 seconds FunctionalityĬtrl + Alt + Shift + R from login screen * Shortcuts with an asterisk ( *) also work with tablets/detachables with a keyboard attached. When in doubt, assume debug shortcuts refer to the physical mapping of a US keyboard layout. Note that some of the below debug keyboard shortcuts are implemented at a very low level and are not keyboard-layout aware. See the official support page for non-debug keyboard shortcuts.
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