====== ChromeOS ======
  * [[s2015|Medion Chromebook S2015]]

===== Developer mode =====
  - Hold [ESC] and [Refresh] buttons and press [Power] button
  - ignore messages and press Ctrl+D
  - confirm with [Enter]
  - press Ctrl+D again (or wait)
  - reboot takes ~30s
  - you're now a developer.

==== "The device owner has disabled developer mode on this device." ====
There could be provisioning information still left on the device. Log in with an arbitrary Google account, update the system and go to [[chrome://policy]]. Load the policies, wait a bit, shut down and try again.

===== USB boot =====
  - Boot
  - Ctrl+Alt+T for Terminal.
  - ''sudo su''
  - ''crossystem dev_boot_usb=1 dev_boot_signed_only=0''
  - reboot
  - hit Ctrl+U

===== further information =====
  * [[https://mrchromebox.tech/|MrChromebox]] – Custom coreboot firmware and firmware utilities for your Chromebook/Chromebox