No, you misunderstood it. It doesn’t work in OpenOS either.
But I’ll try Sensors, atm I have OpenOS 19.5., give me a sec…
Ah, sorry. Makes more sense this way 
.
In my guide I just wrote to format the data partition for relative simplicity’s sake.
Of course you can format any other partition, too, instead of just wiping them … the system partition would come to mind:
In TWRP … Wipe - Advanced Wipe - (choose partition) - Repair or Change File System - Change File System - EXT4
That’s the sensor overview. However, there are no values displayed when I tap on a specific sensor.
(e.g.
x-axis - - - y-axis - - - z-axis
i suppose this is the reserved space vor values
m/s^3 - - - m/s^3 - - - m/s^3)
Consistent little critters …
Did you always flash the same modem.zip, or did you try different versions?
Older ones are still here … Index of /public/misc/fairphone/modem/.
Newer ones are here … Releases · WeAreFairphone/modem_zip_generator · GitHub.
Nope… Still doesn’t work.
If it was me, I would throw UBports at it now to see what a non-Android would have to say to this … https://devices.ubuntu-touch.io/device/FP2 (manual installation recommended).
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I guess after these problems you do not wanna go back. However, there is edxposed for android 9 (lineage 16) and above: https://forum.xda-developers.com/xposed/android-9-0-xposed-solutions-t3889513
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I already tried this method, but apart from it not being official or open source, I don’t like Magisk, since it takes control over root priviledge management, which messes some stuff up (e.g. Yalp wasn’t able to use the root install method anymore), so I deleted it again.
@AnotherElk I haven’t hat that much time (or motivation) during the week, but I’ll try to get UBports on it today or tomorrow to see how it behaves. (Btw, where can I download the files manually when the installer is so broken?)
The manual installation instructions along with the download links for all the files are on https://devices.ubuntu-touch.io/device/FP2
You could try the installer first, though. I had lots of trouble with earlier versions, but the newer ones almost always worked for me (when the same versions failed for others). But I wouldn’t invest more than 2 or 3 tries with the installer.
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Well, the manual installation requires me to run a couple of these commands wget http://cdimage.ubports.com/devices/recovery-FP2.img -O recovery.img && echo "534cc2da2add4a2bd8136b01069ed7dbe432076659fd4780910b6910b916f77b recovery.img" | sha256sum -c, which I can’t do that easily (at least I don’t really know how). But I’ll try the Installer 
Basically, instead of pasting that command here into the forum, paste it into a terminal and that’s it 
I searched a bit, and here’s an introduction to the command line, which I think should work well (it’s part of a wider programming tutorial, so just concentrate on this command line part) …
@Ingo I am not that stupid, it didn’t work.
Der Befehl "wget" ist entweder falsch geschrieben oder konnte nicht gefunden werden.
I hate the Windows command line. Maybe I’ll try it with Linux later, I hope that I have enough time in summer to ditch Windows completely (at least as much as possible).
Paise @AnotherElk, my Lord and Savior!
Today I finally had the motivation* to try this out. (*= I had to get it done until saturday because I need the phone by then)
After procrastinating studying for my biology exam I have in two days (
), I tried everything, and after a successful install of UBports using the Linux installer (the Windows version didn’t recognise the phone in fastboot mode), installing TWRP and not being able to transfer the files because neither MTP nor ADB sideload worked, a couple of failed attempts to install UBports via Linux again I remembered that I could install OpenOS via fastboot, which is what I did and *tadaa*, the screen rotates. Currently, LOS 15 is booting and I hope this works too.
My mental health is completely destroyed and my sanity gone, but hey, at least I have a working phone again. After 7 months.
Tomorrow I’m going to put my data on it again. Hopefully.
Edit from tomorrow: It refused to boot yesterday, but today I wiped the storage and flashed LOS15 again and it finally worked! 
I haven’t finished setting it up completely (Xprivacy is going to take a while), but so far everything runs
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FWIW, you can get GNU Wget to work via Cygwin or WSL(2).
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@Stanzi I honestly didn’t believe you that installing Ubuntu Touch can fix anything but I am here to tell you that I was wrong. I have tried basically everything that I could think of to get the sensors working on a FP2 of mine (flashing all kinds of systems with all partitions and everything) and literally nothing helped.
As it was a device in daily use I couldn’t experiment a lot with it, but today I finally backed up everything, flashed Ubuntu Touch with the ubports installer and immediately the rotation worked in Ubuntu Touch. Flashing back Android (fp2-gms-21.01.0-rel.1-manual) and the sensors in Android work again as well…
The only reasonable explanation I can think of is that something on the persist partition (mounted at /persist in Android) had some problem or whatever and that magically gets fixed by Ubuntu Touch for some reason. But I don’t have any actual evidence of that.
Thanks…
p.s. Ubuntu Touch feels remarkably nice on the FP2 - smoother than the Android 9 GMS build 
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^^
I would never lie to you 
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