Fast Factory Boot mode (FFBM) is a semi-powered mode that is primarily designed to facilitate factory testing and improve productivity. Under normal circumstances, the end user will not encounter. But after the sale of the students recently received a number of customers returned by the VR all-in-one machine, have entered the mode. Specifically, the screen display is neither the boot animation nor the VR interface, and the ADB can normally recognize and enter commands after connecting to the computer via a USB cable, but the Android drop-screen helper (ARDC) has been shown to wait for the system to start to complete. View the kernel boot command line as follows:sched_enable_hmp=1 sched_enable_power_aware=1 console=ttyhsl0,115200,n8 androidboot.console=ttyhsl0 androidboot.hardware=qcom user_debug=31 msm_rtb.filter=0x237 ehci-hcd.park=3 lpm_levels.sleep_disabled=1 [email Protected] ANDROIDBOOT.BOOTDEVICE=624000.UFSHC Androidboot.verifiedbootstate=orange androidboot.veritymode= Enforcing androidboot.keymaster=1 androidboot.serialno=7e9ca27c androidboot.mode=ffbm-00 quiet ANDROIDBOOT.BASEBAND=APQyou can see the androidboot.mode=ffbm-00, while [Ro.bootmode] is [ffbm-00], which confirms that the VR integration machine does enter fast Factory Boot mode. after entering this mode, the machine cannot be restored even if it is forced to restart. Mobile phone If you enter this mode, you can click the touch screen operation, select Restart to enter Android can be restored. The VR all-in-one machine has no touch screen and can only be operated by PC. Since FFBM is a half-boot mode, at this time the Android screen assistant or Vysor and other remote screen tools are not working properly, can only be restored by fastboot command Erase misc partition, as shown in the steps. the commands involved are as follows:adb reboot bootloaderFastBoot Erase Miscfastboot rebootIn order to facilitate subsequent debug, while the hand in the Android screen Assistant (ARDC) to increase the FFBM mode of judgment, when in this mode directly display fast Factory boot mode, rather than waiting boot completely, in order to quickly determine the VR one The state in which the body machine is located.
VR integrated machine how to exit FFBM
