[Samsung Galaxy S9 & S9+ Cross Device Development] Rainbow_Dash:
Pixel Experience ROM for the Galaxy S9+ and the Galaxy S9​

What is this?

Semi-GSI? what's that?

a semi-gsi (at least by my own definition) is a gsi built from source, with heavy patches intended for a specific device that wouldn't make the gsi necessarily as universal as a gsi should be. so in terms: don't flash this on other devices.

How does this differ from any other gsis out there/what are the features?

Well this includes a number of fixes including:

Dual speakers are working.

Ui lag is no more (at least 99.99%).

Aod is working/enabled.

Auto brightness is kinda working.

MTP is working

Other performance fixes and improvments.

What's working/not working?

First up:

2ndly the semi-gsi has a few quirks of it's own. Nothing major or worth noting but you should check the "anything else i should know?" part in the FAQ. hence why HWC is broken

Instructions:

Make sure TWRP has been installed and functional.

Download the latest build image and kernel linked below

Reboot to recovery

Wipe system, data and cache from the wipe menu

Select flash image in twrp, lower right side on the install menu

Flash the rom image as system (and gapps). DONT flash gapps. they are already included in the rom.

Flash the kernel image corresponding to your model as boot

Reboot and enjoy :victory:

Downloads:

Galaxy S9/S9+ Exynos semi-gsi image link: (G965F/FD/S/N): V3

Kernel image link(important to use this. read more in FAQ):

S9 Exynos: V3

S9+ Exynos: V3

Note 9 Exynos: V2.3

A pretty good (unofficial) mirror for above files and more is this

Providing feedback:

You are more than welcome to provide any kind of feedback here.

(limited only to feature requests; it's called "pixel experience" for a reason and it should stay that way)

You can also msg me anytime on telegram @ Rainbow_Alex_Dash

Telegram group?

I usually like to hang around here . It isn't mine but hey.

Changelog:

12.10.2018:

Initial release Boi

V3:

Fixed apn issues; should be automatically added and set now.

Added fingerprint hal; doesn't fix much still a wip

Synced source from the latest pixelexperience upstream

Video Review:

YOUTUBE

Troubleshooting/FAQ:

Q:Can i use any other kernels with this gsi?

A:Nah, not really. I built this kernel specifically to work with this gsi and it includes a few major fixes (for example mtp won't work,major ui lag, no dual speakers etc if you switch to another kernel. But again. If you want to use other kernels, they should* boot. Endurance kernel even has my dual speaker patch and i confirm as working. But again expect bugs.

Q: Is there anything else i should know?

A: Ehhhhhhh, not really. I mean there are some stuff i'm really not proud of,for example to "fix" the ui lag i had to set the minimum gpu frequency to 455; this shouldn't create any issues(perhaps some battery drainage when screen is on) but afaik it doesn't impact sleep or anything else.

Q: My mobile data (3G/4G) is not working

A: Go into network settings and select/create an apn

Q:Would this be preferred over a device specific rom?

A: Overall nah. The reason i didn't set on building device specific los16.....well actually i did and failed. But this is a pretty good placeholder until someone more skilled than me takes over and creates pie device trees.

Q: Safetynet doesn't pass?

A: Yeah, i guess that's a thing. Go into magisk and download some module called props hide or something. Don't forget to run it from terminal. It should work from there

Q: The rom isn't booting/camera doesn't work

A: Flash/make sure you have the BRI4 vendor, the linked kernel and try again.

Q: The rom is in a bootloop/google apps keep crashing

A: You did read the instructions and NOT flash any gapps riighhttt?? smh, wipe /system,/data and /cache and start over

Q: I have another bug; How can i tell it to you while slightly increasing my changes of it ever getting fixed.

A: You can tell me what's going on either here or on telegram WITH A LOGCAT attached(required);if rom isn't booting at all attach /proc/last_kmsg.

Q: I don't know what/how to logcat. Is it really necessary?

A: Logcat or gtfo

Q: How can i support you?

A: Awwww thanks; On most of my posts on the left side there's a "donate to me" paypal button; You can use that,donations are more than welcome, or if you don't have any $ to spare you can also post here about how awesome i am (this surprisingly helps very much)

Credits:

The lineageos team; device maintainers who did a wonderful job at creating device trees

The pixel experience team for creating the rom we so do enjoy

Many good people from the telegram group (linked above) that helped me create this project and spamming for etas

And most importantly thanx to iqblal_sareem best creationner ev3r.

XDA:DevDB Information

Pixel Experience 9.0 Semi-Gsi for the S9/S9+, ROM for the Samsung Galaxy S9

Contributors

Rainbow_Dash, phhusson,malinathani, eamo5, jesec, farovitus

Source Code: https://github.com/rainbowdashh/

ROM OS Version: 9.x Pie

ROM Kernel: Linux 4.x

Based On: AOSP

Version Information

Status: Stable

Stable Release Date: 2018-10-12

Created 2018-10-12

Last Updated 2018-10-19