[Nokia 6.1 Plus (X6) ROMs, Kernels, Recoveries, & O] RootedLee:
How awesome is that - thank you for your hard work, @Sid127.

TWRP's new Advanced -> "Flash Current TWRP" feature has the same effect as its predecessor "Install Recovery Ramdisk", with the advantage of not having to manually select the twrp.img file and then flash it - very convenient! So more appropriately it should be labeled "Flash (or Install) Current TWRP as Recovery Ramdisk". Both features enable booting into TWRP rather than the ROM's built-in recovery when choosing to boot into Recovery.

So here's my report:

(Almost) all ¹ is working mighty fine on my new Nokia 6.1 with the official LineageOS 18.1 (Android 11) ROM, except three things (+ one feature missing):

1) After (while booted into LOS) formatting my SD card as internal

and

having LOS move all data from phone internal to SD, making the SD card the only/ exclusive Internal, TWRP does't or can't access the SD card anymore.

As supposed, I have a PIN set in LOS. Once TWRP has booted, I enter the PIN as requested by TWRP, but after doing so, only see (as before with the SD as mobile storage) that DATA gets decrypted successfully, but no mention of or even an attempt to also decrypt the content of the SD card.

In TWRP storage picker, I do see my SD card with full size (appr. 128 GB), + Internal Storage (19 of the nominal 32GB). But regardless if I choose Internal Storage or MicroSD, TWRP does not see my previous backups (which are now on the encrypted "internal" SD).

Same in TWRP File Manager: the content of the SD formatted as and then dedicated as sole internal and thus encrypted by LOS does

not

show up anywhere (SDCARD/ SDCARD1/ Storage/ mnt etc.).

Still, after choosing "Internal Storage" as backup location, TWRP

does

backup. Afterwards I can choose that backup via "Restore", and also see it in File Manager in /sdcard/TWRP. But when I boot LOS, I do not see the new backup in /sdcard/TWRP, only the older ones. The new backup is nowhere to be found, not even via FX File Manger with root privs, querying the entire file System. Obviously TWRP created the backup into the phone's

real

internal, but LOS has blinded that out after migrating Internal -> SD, most likely by means of a virtual symlink internal /sdcard -> external /sdcard1, and TWRP does not honor that.

Therefore backup options right now are:

- backup to USB via OTG (only partially working, see 3) below)

- backup to internal phone storage, then (while still in TWRP)

move

(copy then delete) the backup via MTP from internal to a storage on one's computer

All that said, the following (non-exclusionary) questions arise:

1. Are you aware of that?

2. Can you or somebody else reproduce this?

3. Is this fixable somehow, either in TWRP or in LOS?

4. Is this a shortcoming of TWRP in general, failing to also decrypt an SD card if a) it's formatted as internal and b) serves as the phones *only* internal?

5. Or is that an issue that only arises with LOS (18.1) but not with other Android 11 ROMs?

I hope some insights on this issue can be shared and gathered, or even better a fix (y)

2) fastboot reboot recovery doesn't work for me; instead my ROM boots.

Nokia connected to my Mac via USB cable and booted into bootloader. Active slot is the correct one with TWRP and my ROM (LineageOS 18.1, Android 11).

I can however boot TWRP just fine via key combo (Volume Up + Power), and also via Magisk in LineageOS, so it's installed correctly.

3) USB OTG is only working with limitations:

works if TWRP was flashed/ installed as per instructions above, then (with the device powered off and (via USB cable) either connected to your computer or plugged into your charger) boot TWRP via the Power/ Volume Up key combo. (This also works in native install - not recommended because then standard boot will boot into TWRP as default rather than into your ROM)

-

NOT

working if booted live!

on your connected USB drive, TWRP only sees the 1st partition with a compatible file system (FATxy, ExFAT, ExtFS) incl. the EFI partition! Therefore make sure a) your USB drive does not have an EFI partition as 1st partition; b) the partition you want to backup to is the 1st with one of the compatible file systems!

4) The "Fix Recovery Bootloop" feature option in the "Advanced" section is missing. I was experiencing a boot loop and had to live-boot another TWRP to execute that feaure, which did fix the issue as expected. @Sid127 it would be great if you could re-add that feature.

________________________________________

¹ run live via fastboot w/o flash, flash then boot, decrypt, backup, restore, USB OTG partially