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Wayland server for Android

7 posts
Thanks Meter: 2
By Hentacler, Junior Member on 21st February 2019, 03:41 PM
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Hi! Does anyone here use Linux desktop distributions in chroot environment on Android device?
I am developing wayland protocol server for Android devices. If anyone is interested in checking my project, latest version of apk is always available here:
Currently I am only focused on running Xwayland as client. Also apk supports audio output.

Simplest instruction:
1. Android 6 or newer required, busybox required, root required
2. Prepare linux distribution in directory, image or on partition. Make sure you have Xwayland installed in it. Make sure you specify which DE to run (or at least xterm) in ~/.xinitrc
3. Install and start sparkle.apk
4. Press "edit", uncomment (remove #) line starting with start_generic_container. Change rest of this line to match your device:
first arg - image or partition where distribution is installed. If distribution is installed in directory and mouting is not needed, leave this arg unchanged.
second arg - mount point or directory with distribution. If you use mounting (first arg), this arg can be left unchanged.
third arg - name of the user which will be used to start Xwayland and DE. Its better to specify non-root. Also this is the user who must have .xinitrc in his home dir (see step 2).
5. Save and click "Start".
6. Any problems and crashes will be reflected in the log.

If you want audio output:
1. Compile and install driver from pcm_sparkle.tar.gz in your distribtion
2. cp 1.asoundrc ~/.asoundrc

If you have blinking problem, change upload_mode from 1 to 2 in settings. If you have bad performance, setting no_damage to true may help, but in most cases no_damage=false is better. Fastest upload mode is 0 (if it works).

If you don't trust me and don't want to give sparkle root permissions (I perfectly understand this) you don't have to. Also you can do without busybox.
But in this case, you need to understand and do a lot of things. Check sparkle's to get idea about what needs to be done. Basically:
1. You need to make /data/data/com.sion.sparkle/files accessible from inside chroot container. You can use bind bound.
2. Make sure you have tmpfs mounted over /tmp in container.
3. You may need to change selinux context on /tmp to match sparkle's context or disable SELinux.
4. You need to create new directory in /tmp, symlink sparkle's wayland socket from /data/data/com.sion.sparkle/files/wayland-0 to this dir. And export XDG_RUNTIME_DIR to point to this dir. Dir must be (ch)owned by user who will be running Xwayland and DE.
5. After all this, you can try to start Xwayland and your DE.
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2nd March 2019, 12:10 AM |#2  
OP Junior Member
Thanks Meter: 2
new version
New version

Added x86 and x86_64 support. Actually it is rewritten almost from scratch but x86 support is the only thing others can notice...
18th March 2019, 11:05 AM |#3  
Junior Member
Thanks Meter: 0
Hello! This project is interesting. I tried you app and it works on my Xiaomi Redmi Note 4X(chromium and glmark from chrooted environment works very well)! Can you publish source code on Github, because it really interesting project?
26th March 2019, 10:44 PM |#4  
Junior Member
Thanks Meter: 0
Also I'm interested, please post it on github!
31st March 2019, 07:51 AM |#5  
Junior Member
Thanks Meter: 2
Did you put this up on github or move this thread? Looks very interesting.
31st March 2019, 10:01 AM |#6  
OP Junior Member
Thanks Meter: 2
Argh, sorry, I decided to abandon this project. You are free to delete thread. Also no copyleft-licensed components were used so I don't have to bother releasing sources.
15th April 2019, 04:32 AM |#7  
Thanks Meter: 4
Originally Posted by Hentacler

Argh, sorry, I decided to abandon this project. You are free to delete thread. Also no copyleft-licensed components were used so I don't have to bother releasing sources.

Check your PM please!
2nd July 2019, 02:36 AM |#8  
OP Junior Member
Thanks Meter: 2
Hello again.
For last two weeks I was rewriting it from scratch (yes. again... yes, third time).
Probably need another week to make it stable.
Currently I am not sure it runs on any device except my own 5-year old phone (LineageOS 14).
I will maintain last version here:
There is no English documentation, but you can see script "" to get idea about how to start xwayland. In most cases it should be enough to edit few lines in that script to make it work on another device. If you execute this script on your device with "install" argument, it is supposed to place itself into sparkle's directory and sparkle is supposed to run it ("start" function) automatically. Sparkle doesn't request root unless script does.
Here is video of sparkle working:
But it seems that KDE + video recording was too much for my old phone
Still, if you going to see video, don't close it until 2:00 where I turned of composition which caused lags.
Also on device everything looks much smoother than on video, even after 2:00.
When I watch fullscreen (1280x720) video on my device, sparkle + xwayland together add just 5% of CPU load (20% load of single core).

Thats it I guess... I tried to to discuss sparkle on (russian forums), but got very bad reception. "xsdl is perfect, dont reinvent the wheel" they say. So I started to hate humanity and I decided to make sparkle personal project. Also this is last time I am solving reCAPTCHA to leave post on XDA.
30th August 2019, 05:06 PM |#9  
OP Junior Member
Thanks Meter: 2
Still alive
We are still alive. I've changed first post to reflect actual state. Now sparkle supports audio, auto-mouting containers and is lot more stable.
Yet there are still many things I want to improve in sparkle's core before adding new functions.
Also there are few demo videos on ftp.
12th October 2019, 03:52 AM |#10  
Senior Member
Thanks Meter: 115
Working great on my redmi 6 pro. Stock miui 9.9.3 rom. With linuxdeploy and sparkle from your ftp. No lag on visual and sound. My Linux distribution is alpinelinux arm64 arch.

Since first time I see your posting on 4pda. I'm interested in it. And finally it's on xda.

Thanks dev.

---------- Post added at 02:52 AM ---------- Previous post was at 02:44 AM ----------

For anyone interested in the topic. Please follow the instructions in documentation from ftp. And Translate it to eng from rus.
2nd January 2020, 02:11 PM |#11  
Thanks Meter: 9
This sounds amazing! Just curious, is it related to ?
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