Lineage OS

TWRP is asking for a password even if pattern was set

This happens for encrypted phone and my TWRP v 3.1.0 (at least). It seems to be a bug in TWRP.

It can be solved by writing numbers instead of points for gesture:

https://www.reddit.com/r/Nexus5/comments/2mskzu/twrp_is_asking_for_a_password/

Or by setting PIN in the system as a lock method and unlocking TWRP with that PIN instead.

https://forums.oneplus.net/threads/twrp-encryption-password.432114/#post-14736345

Or by using default_password as a password.

TWRP is asking for a password even if pattern was set

Upgrade LineageOS by a major version

Upgrade LineageOS by a major version

Download to PC

System install ZIP and Recovery image from https://download.lineageos.org/bacon
GApps NANO image from https://wiki.lineageos.org/gapps.html
- because MICRO only overrides Calendar and has extra GMail, Pixel Launcher and Google Wallpapers.
Magisk image and Manager APK.
Recovery image
- EITHER - TWRP https://eu.dl.twrp.me/bacon/
- OR - Lineage Recovery https://download.lineageos.org/bacon

Installing Lineage Recovery with major version upgrade where previously was used TWRP, can cause inability to unlock screen. Install TWRP back instead.
Fix is to rename/remove the /data/system/locksettings.db from within the TWRP (Advanced > Filemanager), reboot to system and set the new lockscreen.

Prepare PC

Install android-tools to support adb and fastboot https://wiki.lineageos.org/adb_fastboot_guide.html

Setup adb

enable developer options on phone
- Settings > About > [tap Build number 7-times] > [back] > System > Developer options > Andriod/USB debugging
- connect phone to PC via USB
- on PC run sudo adb devices
  - if no permissions is shown then
    - sudo adb kill-server
    - sudo adb start-server
  - if unauthorized is shown then
    - on phone
      - Revoke ADB authorizations
      - and disable/enable Andriod/USB debugging again
      - then on PC run sudo adb devices and confirm the dialog
- on phone tap [x] Always allow USB debugging

Setup fastboot

connect phone to PC via USB
boot phone into fastboot mode
- EITHER when phone powered on, run sudo adb reboot bootloader
- OR when phone powered off, hold [Volume Up] + [Power]
on PC run sudo fastboot devices to verify connection to phone
- if no permissions fastboot is shown, try running it as root

Install new recovery

https://wiki.lineageos.org/devices/bacon/install#installing-a-custom-recovery-using-fastboot

do the same as [Setup fastboot](#setup-fastboot)
on PC run sudo fastboot flash recovery <recovery.img> to flash recovery to phone
on phone
- when powered off (or in Fastboot mode) hold [Volume Down] + [Power] (release after vibration confirmation/screen change) to boot into recovery
- enable ADB
on PC run sudo fastboot reboot to reboot to system, if that you don't want to sideload any other apps

Upgrade the OS

https://wiki.lineageos.org/devices/bacon/upgrade

~~on phone Settings > System > Developer Options~~
- ~~either [x] Rooted Debugging (LineageOS 17.1 or above)~~
- ~~or Root Access Options > ADB Only~~
on PC run sudo adb reboot sideload
- blank screen is OK - bug on some recoveries
on PC run sudo adb sideload </path/to/system-image.zip>
install custom APK packages
- on phone Apply Update > Apply from ADB
  - this enables ADB and sideload
- on PC run sudo db sideload </path/to/package.apk>
on phone [back] > Reboot system now