yashsingh1/xdaforums huggingface dataset:
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] sluTTY:
I am on UNOFFICIAL LOS 16 by NeoArian, build # lineage_sagit-userdebug 9 PQ3A.190801.002 eng.arian.20190817.121746

Can I switch to the OFFICIAL version without losing my data? How?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] trionix:
I use a Norwegian money transfer app called Vipps, which is claiming my device is rooted, so it won't run.

Root is disabled in my dev settings, but that's apparently not enough. Has anyone got any advice? Vipps is used everywhere in Norway, to pay for everything. It's really important.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] singularity0821:
You could flash Magisk and then use Magisk Hide for this app.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] trionix:
Okay so strangely, now when I try to boot into TWRP, it freezes on the 'enter password' screen, and then reboots after maybe 30 seconds.

Have you encountered anything like this?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] singularity0821:
This happens from time to time on my phone. But once I reboot it usually works.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] DomeD13:
Hi guys,

I'm using this rom since it's official. But since the built from october 13th I have a big battery drain. The Android OS is draining around 75% a day! Currently I'm on the latest built but nothing changed. What I already did is clearing cache and dalvik, deleting all data from play-services and the Google App, activated all battery optimisations that are possible in Settings.

Any tipps?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] geronimoge:
I had the same problem. It would be great if the other version could be removed from the second post or to explain there which is which so it's clear which one to chose [MENTION=8746471]NeoArian[/MENTION].
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] mkdk:
After the 25 Oct update I have lost dialer. Is it normal?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] anderson997:
Added an System profile to disable security when connected to wifi at home, the trigger is WIFI connected, and when the wifi is disconnected, it would be switched back to default profile. But when I restart the phone in the [MENTION=313982]home[/MENTION] profile with wifi connected , it would stuck at "Phone is starting", googled around, it is said that the launcher is missing. In the meantime I can goto setup, the default home app is empty, also the profile is set to default. Only after I disconnect the wifi then restart, it got working all well. Could anyone please help with this? Thanks.

ROM: Fresh installed October 26,2019, w/ Magisk v20, EdXposed v0.4.5.1_beta4463 SandHook.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] richardlittlewood:
Cant boot on latest LineageOS builds

I've followed the install instructions, unlocked device, installed latest TWRP, wiped everything and done a format then installed these 3 zips queued in order:

fw_sagit_miui_MI6Global_V10.4.1.0.PCAMIXM_38edd1584c_9.0

lineage-16.0-20191115-nightly-sagit-signed

open_gapps-arm64-9.0-stock-20191115

I get the Mi boot screen for a couple of seconds, then the lineageOS boot screen for a 6 minutes before it goes back to the Mi boot screen and then TWRP.:( I also tried other OS builds (5th, and 14th). I see this (or a similar) issue was reported on a different build.

Q) On the nightly builds list there are only a few builds available, how do I get a known good build from say 2 weeks ago (one that people have used OK).

Could anyone suggest where I'm going wrong?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] odubinkin:
Try to format Data just after installing all 3 zips.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] richardlittlewood:
Thanks. I've since managed to get it running stock Android 10 (PixelExperience_sagit-10.0-20191027-1329-UNOFFICIAL) and it works great.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] Krzysieq:
Hi guys, what is the current SELinux status on this ROM? Can I install this ROM not rooted?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] NeoArian:
Official LineageOS requires selinux to be configured in enforcing. Of course you don't have to root this ROM.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] faabiano7:
youtube is not working on build 20191125. It just keeps loading
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] mctenddies:
Did someone figure a good, properly working working camera configuration?

Gcam is giving me hell with horrendous loading times in hdr photos...
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] Kamil Kupiec:
Great ROM. [MENTION=8746471]NeoArian[/MENTION] is there a chance for the official version of los 17 based on Android Q?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] Barracuda77777:
Seriously? Lineage 17 code itself is still work in progress, there isn't a single los 17 official build yet here you are nagging wanting it official. As sure sure as the sun goes up and down noobs will never change on XDA.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] egendomligt:
Did you find a fix for this bug? I have the same thing. Others can't use my phone even though they know my pattern because the home button needs to be unlocked with my fingerprint.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] Gekobix:
[MENTION=4803059]egendomligt[/MENTION]

Nope, it's still here.

I've been using Smart Lock and set at least my house safe so it's always unlocked.

But I found out that if you use face unlock it doesn't do that, only if you unclock with just the PIN/pass/sequence.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] NeoArian:
I looked into that but didn't really find something. Luckily it is fixed with Android 10 though.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] Gekobix:
[MENTION=8746471]NeoArian[/MENTION]

Sweet! Thank you!

Just in case I paste the log of the test I did [pastebin KCNevGHk] (can't post links yet)

Tried to open Instagram, lock, unlock with the pin and pressed the home button.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] mctenddies:
Default camera in video is shooting at 12 fps, any way to crank it up to 30?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] patrikos23:
I have a dilemma, when I upload only lineage, the system gets up elegantly, and when I overwrite gapps, it restarts to recovery. Anyone know why this is happening? [MENTION=8746471]NeoArian[/MENTION]?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] patrikos23:
what gapps to use on lineage 16 so that the phone does not restart for recovery?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] patrikos23:
I already know, upload gapps from January 17 and everything is fine
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] Carlinyos18:
Which firmware should I use for this version?

I'm seeing an immense 5-6%/h battery drain on this rom (at idle, with no connections nor apps opened) with the latest 11.0.3.0 firmware from xiaomi.eu.

would like to see that % reduced
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] meruem02:
last update caused to bootloop.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] Tommytommy1234:
Anybody knows who maintain this build or if is still maintained?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] NeoArian:
I am obviously maintaining it as the wiki and this thread says. It is still maintained and security patches are merged regularly.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] GG.sciuridae:
Is there anyone who have returned to this ROM from any Android 10 ROM? If so, how can I flash this as I have system-as-root structure. Is getting back to the TWRP in the second post enough?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] simoneluconi:
I have update from 15.1, update went really smooth, everything works. Except i have no audio for multimedia. System sound, ringtone ecc works perfectly, but i can't hear music from spotify, instagram and audio from Whatsapp and telegram. Any ideas?

Update:

Installed firmare 8.10.25 and it fixed it. Downloaded from here: https://androidfilehost.com/?fid=11410932744536989064

I thought I had already installed the latest compatible version
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] SHJordan:
system rom gone?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] NeoArian:
The recommended and required firmware 8.4.19 works fine. You will have much fun when you want to update because your firmware is not compatible, it has a more recent trustzone version which will block the installation. So I can just repeat myself that there is a reason why we require this firmware and I don't know why noone even tries to use the recommended one but instead flashes incompatible versions.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] EmuMaster58:
Amazing work.

What is status with ARB(anti roll back) protection?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] NeoArian:
What makes you think that anti rollback is enabled at our device?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] Carlosbgx:
To any of the developers of LOS outhere. I suggest that in the official installing guide (https://wiki.lineageos.org/devices/sagit/install) you propose an alternative to ADB sideload (it works great with small files, but with the big 600mb ROM it gets stuck at 47%, at least thats what happened to me). I suggest using MTP. You just have to first reboot device to recovery after performing all the wipes in the guide, and then you can just copy paste the files into your phone through the browser.

Thx for your work :)
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] dgm_mixtoon:
i have error 7, whathappend?, with any roms, i can't flash something :(
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] Mindzy:
Have anyone occurred that, after flashing open gapps system aroma or stock, it keeps bootloop to recovery and there is no file in /system? Any solutions?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] Tommytommy1234:
Read posts above. Flash the recommended firmware and then flash rom.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] NeoArian:
adb push works fine, mtp is an alternative way. I use adb push multiple times a week to push 700mb+ files to my phone without any problem. You should check your connection/cable and adb driver.

Read post #2... :(

Make sure to use the twrp from post #2. It seems like you use an twrp build for system as root?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] Carlosbgx:
Okay, I'll have a look at that. I was just mentioning because people might have the same issue as I'm having and in that case, it's easier if they have some sort of alternative, don't you think? :)

Really, thx 4 ur work!
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] Icatream:
Thanks a lot :D

Update is easy, no need to wipe data.

adb sideload is a little strange.

twrp console print finish, but the adb print below

serving: 'mi6\lineage-16.0-20190613-nightly-sagit-signed.zip' (~47%) adb: failed to read command: No error

so, i push the rom into sdcard, install it again.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] Mindzy:
Thanks for your reply. I tried twrp from post #2, still the same problem here.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] camp70:
Try nano pack, it works
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] Mindzy:
I just find a solution here. I sideload lineage and reboot to system. Then reboot to recovery and sideload open gapps aroma. It works:). But don't know why:confused:
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] DomeD13:
Hi, with the twrp in post #1 I can not decrypt my data in twrp. Twrp just doesn't show me anything where I can enter my passcode. What can I do?

Update: worked after flashing Los16

dirty flashing worked fine. Looks great. Thanks a lot. Only the google Assistant doens't work. But it's not important to me.

An other thing that I just noticed.

When I get any notifications, it takes up to 15 seconds until my phone makes the notification sound. I can see the notifiaction already in the status bar. Heads up notification also doesn't work for me.

Some notifications (gmail for example) don't show up anyway. If I open the app, the new email is there, but I never got a notification in my status bar, or head up. Tested it several times.

Everything else seems to work fine.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] thevirionz:
Successfully upgraded from official lineageos 15.1.

Not very smooth process though, at first I got stuck on bootanimation (like a bootloop), so I rebooted to recovery and then clear dalvik + cache, and done.

But after that, I got stuck on 'Phone is starting' screen after unlocking the lock screen several times. I think it's because I set third party launcher as default. So I tried to go to settings immediately after unlocking the lock screen, and then reset the default launcher, and it worked.

I experience some freeze also that makes the phone like, hot reboot? (Idk the terms)

Well probably all of those issues happened because of my installed apps and personalization in previous version of los.

Now after several restarts and dalvik + cache wipes, the rom is incredibly smooth.

Many thanks for all the maintainers, keep up the good work!
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] DomeD13:
Battery drain

Battery is draining a lot more than on Los 15.1 for me.

I only got 3,5h of SOT. With Los15.1 it was around 6,5h.

Especially in standby, battery percentage is running.

Latest FW installed.

Can I do anything to this?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] caesarwoo:
Clean flash with the TWRP and firmware provided. The only change was the /data partition was F2FS, and it now stuck at boot animation.

Does this ROM support F2FS? Or do I have to use EXT4?

Thanks a lot.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] Carlosbgx:
I got exactly the same issue, dunno why. i guess time to use adb expired quicker than it should have. That´s why I suggested them to add into the official guide to use MTP if people got the same ptoblem. However they haven't done it yet (and maybe never do) :(

---------- Post added at 05:08 PM ---------- Previous post was at 04:50 PM ----------

Google Assistant isn't working for me either. I'll have a look at it after my exams go past.

About the battery drain, this is one of the first builds yet. I experienced a really huge drain tonight, but it makes sense as we are in such an early stage. I read on your previous post that you dirty flashed the ROM, that probably doesn't help either (I dunno if after dirty flashing you flashed it clean tho). Also keep in mind that Xiaomi should release their Pie source code 'soon' and that should also help the developers in their amazing job. So far I'm having good performance in games and on previous LOS I didn't have it.

BTW, to save battery, disable Ambient display if you havent done it yet
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] DomeD13:
I know that it's an early build, but I didn't think battery drain could be so high. Actually thinking about going back to LOS15.1 just because of the battery drain.

Clean flashed it again yesterday but battery drain is the same.

Everything else works really good and quite smooth. Great rom, except the battery.

One more thing. NFC deactivates itself after paying with google pay. Is it a bug or a feature? I would prefer, that nfc just stays activated
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] Carlosbgx:
My NFC works perfectly, it didn't deactivate or anything (I've already used it to pay more than once). Maybe you casually changed it on the notification panel without noticing. I hope battery gets better, cause the ROM works extremely well!
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] DomeD13:
I dont know. Maybe...I'll have a look at nfc the next days.

Yes, Rom is really great except the battery life.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] Dobsgw:
I welcome the return of HMP for LOS tbh

Everything is great :)
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] dgm_mixtoon:
last update kill my phone, only boot to recovery after flash.. :( help me!
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] dampa75:
You need to remove magisk.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] Thorst1:
Those of you experiencing battery drain, did you check which apps / processes use a lot of juice? In my experience, a LineageOS ROM upgrade sometimes resulted in some apps hanging or something, which caused a high battery drain. Using BBS (BetterBatteryStats) I usually managed to find the culprit and re-install it or something. If it's the Google framework, though, there's not much to be done, except use stuff like Trust to limit it's power.

I'm still on NeoArian's unofficial LOS 16 build myself, so I can't comment on the battery drain of this official build.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] atwar_1:
Until last friday I used unofficial LOS 16 by NeoArian. SoT level was about 5,5h - 6h. Now I have official LOS 16, SoT is about 3,5h - 4h. In my point of view it's firmware problem: 9.5.30 in unofficial vs old 8.4.19 official. Without firmware change it will not be better.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] thevirionz:
I think it's probably because of the kernel (or different things like apps installed on the device, usage patterns, etc)

I haven't tried the unofficial ones, but I use custom kernel that based from official, with the EAS commits from unofficial ones (thanks NeoArian for the source).

Still monitoring the SoT though, but it's quite good so far.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] fantamadnesss:
Hello, latest nightly Is really stable overall, only bug i found is when i plug in my USB headphones and disconnect them i still have no audio, It acts as i still have them plugged in. A reboot fixes the issue until the next time i plug them in. Thanks for the great rom
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] Alessandro999:
are you able to share the eas kernel or create a forum post
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] DanteDmc11:
Fast charge no work her
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] karzan24:
Camera doesn't work and how can i add MIUI camera ???

I have noticed some other roms have it
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] Thorst1:
You can't install MIUI cam without using Magisk, since this version of the ROM misses certain libs.

Camera should work, of course. If you mean Gcam, I've had success with some APK's and less luck with others.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] DomeD13:
Already checked. There's no app that consumes more than normal. But battery just runs faster. Disabling double tap to wake helped a lot for me. Now standby battery consuption is okay. But double tap to wake is actually an impoertant feature to me.

If the display is on battery drain is still quite high. SOT of 4h at the moment. With the last LOS 15.1 I got around 6h
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] norbert.x:
For how long have you been observing your SOT?

I'd give it a few days before judging the battery performance.

My SOT actually improved from the unofficial rom after two days of usage. YMMV
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] roguewave:
Could you exmplain me how to install miui camera?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] DomeD13:
I found two more bugs.

When do not disturb is activated and media volume set to 0. Whatsapp makes sounds when sending messages.

And I cannot active Hotspot Tethering sonce the last update. It just says "Error"
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] Thorst1:
You'll need to install a Magisk module. This was recommended by [MENTION=8746471]NeoArian[/MENTION] a while ago for his unofficial LOS 16, before Pie blobs were available;

It is by Danilo38 (@dan3840) https://drive.google.com/file/d/1x5O6K7x2x2RysdQG-0SYY0A2dVdYiN_B/view?usp=drivesdk
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] NeoArian:
To use MiuiCamera you should use this flashable zip: https://androidfilehost.com/?fid=818222786056031834

When thes ROM will be updated with pie blobs i will provide a new zip with the according changes.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] geronimoge:
Do GCam Ports still work after flashing this zip?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] NeoArian:
Why they should not?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] geronimoge:
With other miui camera versions for other devices afaik there came different libraries (?) with the flashable zip. So snap camera and gcam didn't work anymore.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] sami.khawaja:
I can confirm that it works. The slow motion feature doesn't work, but I don't really use it.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] :
To use MiuiCamera you should use this flashable zip: https://androidfilehost.com/?fid=818222786056031834

When thes ROM will be updated with pie blobs i will provide a new zip with the according changes.

Arian has already provided, just enjoy it:svetius:
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] penelopeXDA:
Unfortunately it doesn't work for me.

I'm getting an FC after flashing and opening the app

You'll find the log here:

https://framadrop.org/r/MEZrNF8jS2#6qz7sW4cEWNW2UCUs8PVihbUIuxMWRYQBuGUDqs7N0o=
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] mELIANTE:
You need to set the app permissions before opening it the first time.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] sassoz:
Can someone please explain how to install a working gcam?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] AndreLuiztk:
https://xdaforums.com/mi-6/themes/google-camera-mod-switchable-telephoto-t3859831

https://xdaforums.com/mi-6/themes/support-gcam-hdr-mi6-t3758876
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] keepdying:
what's the difference of this build's from your unofficial?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] :
unofficial one is Arian's homemade build, it's signed with different keys. the unofficial one includes not yet merged features(like pie blobs), but they both will keep updating
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] Roddy_Perry:
Same situation here. I'm using the firmware and trwp recommended in post #2 and I'm not being asked for a password to decrypt data.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] geronimoge:
*deleted*
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] felipefda:
I'm stuck on boot loop when I tried update after 20190612.

I'm going try remove magisk first. It will be necessary before every update?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] keepdying:
i had too much problem with both unofficial and official builds

I couldnt open camera. Miui Google Stock. all of them didnt work. Pixel Launcher comes with OpenGAPPS is always giving fclose. I'm gonna stick to Pixel Experience for a while again. :P
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] penelopeXDA:
Thanks but I did that.

I even cleared cache and data, gave permissions and tried again. Still the same, getting a FC when opening the app.
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] NeoArian:
By saying you couldn't open camera, do you mean that the camera doesn't work at all for you? Have you used any magisk modules? This seems to be definitely your problem and is not common. If you want to install pixel launcher on this ROM you would have to use a custom one( like lawn chair I guess).

Have you formatted data before flashing this ROM?

Removing magisk shouldn't be necessary as long as you don't have crazy modules. Could you explain what you have flashed?
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] Roddy_Perry:
No, I'm trying to upgrade from the last LOS 15.1 stable release 2019-05-17. Do I need to format data to upgrade to stable. Apologies if that's specified somewhere, must have missed it. I assumed being stable that upgrade was possible(?)
[Xiaomi Mi 6 ROMs, Kernels, Recoveries, & Other Dev] singularity0821:
Install the correct firmware, listed in this thread and follow this guide: https://wiki.lineageos.org/devices/sagit/upgrade