Having my Redmi Note 5 stuck at the LineageOS logo, I tried different ROMs like Resurrection Remix OS. They work well. After some reserach, I found a hint to some kind of encryption in the LineageOS release thread on xda-developers. So I re-flashed the stock MIUI ROM (without firmware cause of Xiaomi's devious anti roll-back mechanism) and LineageOS could be installed without problems.

I want to understand this topic:

  • What are those keys?
  • Why LineageOS needs them?
  • Has this anything to do with device encryption?
  • Is this a Xiaomi specific topic or does it apply to other manufactures as well?

Currently, I know very little about those encryption keys:

  • It seems that they're generated by the stock MIUI on first boot
  • They got deleted by formatting in TWRP, not on simply wiping
  • We don't get any usefull error message, only a endless booting LineageOS animation
  • Encryption can be bypassed using a zip from here. But without OTA updates and the zip for bypassing must be flashed on each LineageOS update
  • Other ROMs like MoKee or Resurrection Remix OS don't care
  • 1
    Really interesting question, something which confusing me too. Would be nice if some experienced user or developer could bring light into the dark of this topic. – Sascha Oct 26 '18 at 17:54

Format data using TWRP, unmount the data partition, then resize the partition with adb shell : resize2fs /dev/block/mmcblk0p50 51G

(my original size of filesystem /dev/block/mmcblk0p50 was 52.1G (you can find it with the command "df -h /dev/block/mmcblk0p50") The encryption process need to take some place at the end of the partition or it will fail - this thread has helped me : github.com/CyanogenMod/android_device_motorola_xt907/issues/3 You can debug also the problem with the adb logcat command.

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