[UNOFFICIAL BUILD] Xiaomi Mi Mix 3 (perseus)

[smu44]

Hi,

As usual, please take one or more backup(s) of your working device and ensure you can restore.

I am not responsible for what can happen, from the appliance catching fire to the cat scratching your mother-in-law

Please share you feedback

==>> MArch 18 2023: 1.9 R build, please see here: [UNOFFICIAL BUILD] Xiaomi Mi Mix 3 (perseus) - #64 by smu44
Latest Q build (0.23.9), please see here.

4th button fix : [UNOFFICIAL BUILD] Xiaomi Mi Mix 3 (perseus) - #12 by smu44

XDA forums : https://forum.xda-developers.com/c/xiaomi-mi-mix-3.8145/

Please see release post (link above) for building details.

Regain your privacy! Adopt /e/ the unGoogled mobile OS and online services

[answer35]

Hi, Thank you for the build and your time. After testing it on my device, I had noticed some issue using camera app. Actually it doesn’t open at all but stays stuck in loading I think. Other than this, I haven’t noticed any major issue yet.

[smu44]

Thank you very much for your feedback !

Camera issues seem common by these days, not only for this device

I’ll dig into that as soon as I have free time, meanwhile could you please try :

• Open Camera Crash, how to reset? {SOLVED}
• https://footej.com/

[answer35]

Hi, Thank you for your reply.
I’ve tried those two solutions but none of them are working.
Footej give me a error message regarding camera service which is unavailable

Someone from a MIX3 group on Telegram told me to send you those links which seems to be the only way to fix camera issues:
https://review.arrowos.net/c/ArrowOS/android_device_qcom_sepolicy/+/10896
https://review.arrowos.net/c/ArrowOS/android_device_arrow_sepolicy/+/10895

I hope it can help you to fix this and maybe for other devices you had the issues

[smu44]

Thank you !

I’ll take a close look ASAP (but not before next week-end …).

[smu44]

Good news, I was able to acquire a second-hand device
So I will be able to test by myself and improve the build image.

[smu44]

After days and weeks of testing builds in the little free time I have, I can finally come back with a new 0.17 Q version, with a working camera!

Next week I’ll switch from my good old Mi Mix 2 to conduct complete tests as a daily driver, you’re welcome to join !

Here is the link : https://www.androidfilehost.com/?fid=14943124697586360930

To “clean” flash over another ROM or Android version (you will lose your datas !) :

• boot to TWRP
• wipe cache + Dalvik + System
• format Data
• adb copy zip file to /sdcard
• install with TWRP

For a “dirty” flash (from /e/ Q) you can only install then wipe cache + Dalvik.

Please be aware that the GPS can take a loooong time to acquire a decent location, and may not use BeiDou/Galileo. I’ll work on that later.

About the camera fix : @answer35 was totally right, thanks !
I’ll explain later this week how I applied it to /e/ building system (it is quite simple).

[smu44]

So far, so good : everything is working fine

I’ll post the build method as soon as I’ve some free time …

[smu44]

How to build with camera fix (warning : time-consuming method !) :

• start a normal Docker build as instructed in my first post
• once successfully terminated, delete everything from “logs” and “zips” folder (you may want to try this build, be aware that the camera won’t work)
• apply all changes from https://review.arrowos.net/q/topic:"perseus-hax"+(status:open%20OR%20status:merged) in your source tree (see below for hints)
• start the Docker build again
• enjoy

Hints :

• qva is in src/Q/device/qcom/sepolicy/
• dynamic & vendor are in src/Q/device/lineage/sepolicy/
• repo or git commands will not override your changes, nor synchronize other files anymore; thus I recommend to start over with a clean src tree for each new build

They are more efficient (in matter of time) ways to build this ROM, but I found the Docker way much more easier for others to reproduce

[smu44]

Unfortunately, I won’t be able to enhance GPS
/e/ is relying on LineageOS Xiaomi kernel, which is somehow behind latest Xiaomi releases.
It would be too much work for me to fork LOS tree and merge latest Xiaomi kernel

I could confirm (hiking in France) that U.S. GPS is working fine, along with Radiocells.org location module instead of Mozilla’s one (because of the offline database ).

[smu44]

Today I got the 4th button (at left of screen) on duty

Quite simple :

• reboot to TWRP
• mount System partition r/w (may have to play with TWRP settings if mounted r/o)
• get key mapping file with adb pull /system/usr/keylayout/gpio-keys.kl
• with a text editor (I used Notepad++), change Android key code for : key 689 VOICE_ASSIST (I’ve put key 689 APP_SWITCH for testing)
• put back key mapping file with adb push gpio-keys.kl /system/usr/keylayout/
• ensure (adb shell) that file is “-rw-r--r-- 1 root root”
• unmount System partition
• reboot system
• enjoy

Android key code for APP_SWITCH : KeyEvent  |  Android Developers
AFAIK, every KEYCODE_*** in the list can be mapped to (remove the KEYCODE_ header), of course some won’t do anything on a phone
You may try, for example :

• Music Player (MUSIC)
• Call (CALL)
• Contacts (CONTACTS)
• Screenshot (SYSRQ)
• Mute/Unmute Media Volume (VOLUME_MUTE)
• Play/Pause Media (MEDIA_PLAY_PAUSE)
• Next Media (MEDIA_NEXT)
• Recent Apps (APP_SWITCH)
• Open/Close Quick Settings (QPANEL_ON_OFF)
• Internet Browser (EXPLORER)
• Calendar (CALENDAR)
• Calculator (CALCULATOR)

Thanks to original author and Mi MIX 3 community Telegram group !

[smu44]

Hi !

New /e/ 0.18 Q ROM available

Download : AndroidFileHost, mirror
MD5 : 0dd5b3ec4f1f4a39e2a7a064725c496a

I dirty-flashed it yesterday over 0.17 Q, so far so good !
Camera still working

NB : if you applied the 4th button fix, you’ll have to apply it again.

To “clean” flash over another ROM or Android version (you will lose your datas !) :

• boot to TWRP
• wipe cache + Dalvik + System
• format Data
• adb copy zip file to /sdcard
• install with TWRP

For a “dirty” flash (from /e/ Q) you can only install then wipe cache + Dalvik.

@Manoj : could I please edit the first post ? Link is outdated … Thanks

[Manoj]

Hi @smu44 i have made the first post a wiki …you should be able to make the edits now. That way it would remain updated.

[smu44]

It’s working, thank you very much

[smu44]

Hi !

New /e/ 0.18.2 Q ROM available

Download : here or here.
MD5 : 26f81112766ba3713c6bbe5a720ca0ac

NB : if you applied the 4th button fix, you’ll have to apply it again.

From a /e/ Q ROM you can only “dirty flash” then wipe cache + Dalvik.

To “clean” flash over another ROM or Android version (you will lose your datas !) :

• boot to TWRP
• wipe cache + Dalvik + System
• format Data
• adb push zip file to /sdcard
• install with TWRP

Feedback welcome !

[smu44]

Hi !

New /e/ 0.19.5 Q ROM available
(commits : Commits · v0.19.5-q · e / os / releases · GitLab).

Download : here .
MD5 : 9e545c906c289fff0b35fae7cb152570

NB : if you applied the 4th button fix, you’ll have to apply it again.

From a /e/ Q ROM you can only “dirty flash” then wipe cache + Dalvik.

To “clean” flash over another ROM or Android version (you will lose your datas !) :

• boot to TWRP
• wipe cache + Dalvik + System
• format Data
• adb push zip file to /sdcard
• install with TWRP

Feedback welcome !

[smu44]

NB : this ROM has LineageOS Trebuchet integrated (is was not my intent, guess it comes from LOS source tree …).
To launch it, in an ADB root shell : am start -n com.android.launcher3/.lineage.LineageLauncher

Enjoy

[aibd]

Thanks for that, it exists (hidden) in my official (I guess perhaps all), I had being wondering how to enable it.

[petefoth]

Having started it via adb, is it possible to set it as the default Launcher app?

[smu44]

Nope, intent has been removed in /e/ OS : Trebuchet: Remove HOME category from intent-filter (b44075bc) · Commits · e / os / android_packages_apps_Trebuchet · GitLab

However, I could add a Trebuchet launch icon in Bliss, using AppManager.

(made with scrcpy & ScreenToGif)