Differences

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--- doc:appunti:hardware:xiaomi_mi_a1 [2019/11/09 12:44] – [Install the TWRP Recovery] niccolo
+++ doc:appunti:hardware:xiaomi_mi_a1 [2019/11/09 14:48] – [Upgrading the Operating System] niccolo
@@ Line 273: / Line 273: @@
 The phone automatically warns about the availability of an **OTA (On The Air) Upgrade**. You can also check for upgrades availability by tapping //Settings// => //System// => //**System Updates**//.
-If you allow downloading and installing the upgrade, a check will be performed about the **integrity** of the **boot image** and the **system image**, before the actual install. The check will fail and the upgrade will be aborted if one of this condition is true:
+If you allow downloading and installing the upgrade, a check will be performed about the **integrity** of the **boot image** and the **system image**, before the actual install. The check will fail and the upgrade will be aborted if one or both of these two conditions is true:
   - You have installed **Magisk SU** or **TWRP Recovery**. These software are installed into the boot partition, either **boot_a** or **boot_b** partition. The installation of Magisk patches only the active boot partition, whereas TWRP will patches (install itself) both boot partitions.
@@ Line 280: / Line 280: @@
 The upgrade process will fail with a warning message **Couldn’t update - Installation problem** (in Italian: //Impossibile aggiornare - Problema di installazione//).
-To rescue from the first condition, it is sufficient to restore the boot partition from the original backup. You will loose root and TWRP Recovery, but you can reinstall them after the upgrade. If you have just installed Magisk, uninstalling it should be rather simple. Start the Magisk Manager app, disable and uninstall all the modules (if any) and reboot. Then run Magisk Manager again and choose to uninstall it completely. But if you have installed also TWRP you have to recover from a backup image. This is the recipe to run from a PC command line (supposing that active partition is B and that you have the original **boot_b.img** dump):
+To escape from the first condition, it is sufficient to **restore the boot partition** from the original backup. You will loose root and TWRP Recovery, but you can reinstall them after the upgrade. If you have just installed Magisk, uninstalling it should be sufficient and rather simple. Start the Magisk Manager app, disable and uninstall all the modules (if any) and reboot. Then run Magisk Manager again and choose to uninstall it completely. But if you have installed also TWRP you have to recover from a backup image. This is the recipe to run from a PC command line (supposing that **active partition is B** and that you have the original **boot_b.img** dump):
 <code>
@@ Line 288: / Line 288: @@
 </code>
-Allow upgrading after tampering the /system partition is more painful; yuo have to restore the full system by flashing the original ROM (so loosing all your data, apps and settings), then you will allow the update to install, and restore all your customization.
+Allowing automatic OTA upgrade after **tampering the /system partition** is more painful: you have to **restore system partition** by flashing it in fastboot mode. Obviously you need the original **system.img** file, either from your own backup or from factory ROM archive. Fortunately enough Xiaomi provides full stock ROM archives of the various versions. Look at this **[[https://forum.xda-developers.com/mi-a1/how-to/ota-official-fastboot-image-n2g47h-7-12-t3728929|forum post]]** and search for your version.
+Once you extracted the system.img file from the archive, boot in fastboot mode and execute the following from an attached PC (once again your **active partition is B**):
+<code>
+fastboot flash system_b system.img
+fastboot reboot
+</code>
 ==== The OTA Update ====