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Partition and Install PostmarketOS (Alpine Linux)

  • Wait for 15 days to unlock your tablet (unlock will remove all user data!)

  • Get the recovery image (not be FLASHED) wget https://github.com/serdeliuk/xiaomi-nabu-orangefox/releases/download/2/xiaomi-nabu-orangefox.0.0.2.zip

  • unzip xiaomi-nabu-orangefox.0.0.2.zip

  • adb reboot bootloader

  • Now when FASTBOOT appear on screen then run fastboot boot xiaomi-nabu-orangefox.img from your host

  • Check the userdata partition number parted /dev/block/sda

  • Inside parted print to view partitions and then remove userdata partition rm 31

  • Inside parted the 30th partition ends at 10.9GB and for 256GB version of tablet one can use mkpart userdata 10.9GB 100GB. This shall create ~90GB userdata partition and rest will be kept for pmos.

  • Inside parted now create pmos partition mkpart pmos ext4 100GB 250GB

  • Inside parted check the free space print free if it shows a few GBs then you might go back and adjust your partitions, if not, do quit and reboot.

  • The reboot should land you to recovery screen, select WIPE USERDATA and reboot to Android with new userdata partition

  • Connect adb and do adb reboot bootloader again

  • Now when FASTBOOT appears on screen run fastboot getvar current-slot. This usually should print a, this means the Android uses slot a, this also means that slot b could be used for pmos

  • There are 3 partitions involved to boot pmos? boot, vbmeta, dtbo? (need more info)

  • fastboot set_active b

  • Download the pmos preview image from here

  • Extract the above tar file and cd

  • Flash the modified vbmeta to disable the boot verification process fastboot flash vbmeta_b vbmeta_disabled.img

  • Erase dtbo_b to prevent interfering with pmos fastboot erase dtbo_b

  • Flash Linux Kernel to slot b boot region fastboot flash boot_b boot.img (You may use alternate kernel from here which contains CONFIG_SCSI_UFS_BSG for switching slots using qbootctl)

  • Now flash prebuilt Alpine image (pmos) fastboot flash pmos xiaomi-nabu.img

  • Once done fastboot reboot to get into KDE Desktop.

  • Default user is user and password is 147147 details