[Samsung Galaxy S II Plus] andixlm:
CyanogenMod is a free, community built, aftermarket firmware distribution of Android 5.1.1 (Lollipop), which is designed to increase performance and reliability over stock Android for your device.

#include
/*
* Your warranty is now void.
*
* I am not responsible for bricked devices, dead SD cards,
* thermonuclear war, or you getting fired because the alarm app failed. Please
* do some research if you have any concerns about features included in this ROM
* before flashing it! YOU are choosing to make these modifications, and if
* you point the finger at me for messing up your device, I will laugh at you.
*/

CyanogenMod is based on the Android Open Source Project with extra contributions from many people within the Android community. It can be used without any need to have any Google application installed. Linked below is a package that has come from another Android project that restore the Google parts. CyanogenMod does still include various hardware-specific code, which is also slowly being open-sourced anyway.

All the source code for CyanogenMod is available in the CyanogenMod Github repo.

Device-specific source code for the Samsung Galaxy S II Plus are available from:

https://github.com/andixlm/android_device_samsung_galaxys2plus-common

https://github.com/andixlm/android_device_samsung_i9105

https://github.com/andixlm/android_device_samsung_i9105p

https://github.com/andixlm/android_kernel_samsung_galaxys2plus-common

Compatibilitiy Patches: https://github.com/andixlm/build_tools/tree/cm-12.1/patches

Do not submit bugs on CyanogenMod issue tracker

Downloads

ROM: https://s.basketbuild.com/devs/andixlm/CM12.1

GApps: http://opengapps.org

What works?

RIL (Calls, SMS, Mobile Data)

Wi-Fi

Bluetooth

GPS

Camera

Video playback

Audio (playback & recording)

Sensors (Accelerometer, Compass, Light, Proximity, etc.)

Everything else not listed under "Known issues"

Known Issues

There are no major hardware issues

Changelog

20160115: Upstream merge. Fixed freezing.

20160111: Upstream merge.

20151213: Upstream merge.

20151107: Upstream merge.

20151004: Upstream merge, fixes and improvements.

20150912: Upstream merge.

20150828: Restored adaptive backlight feature. Reduced /system partition's size. Upstream merge.

20150812: Upstream merge.

20150709: Upstream merge.

20150617: Upstream merge.

20150523: Added Ambient display feature. Upstream merge.

20150503: Fixed screen pinning. Removed adaptive backlight feature. Android 5.1.1. Upstream merge.

20150415: Initial release.

Reporting bugs

You are allowed to report bugs only in this thread.

Grab a logcat right after the problem has occurred. (Please include at least a few pages of the log, not just the last few lines, unless you know what you're doing.)

If it is a random reboot, grab /proc/last_kmsg. (Do not bother getting a logcat unless you can get it just before the reboot. A logcat after a reboot is useless)

If the problem disappears after running "setenforce 0" from a root shell, grab /data/misc/audit/audit.log

Remember to provide as much info as possible. The more info you provide, the more likely that the bug will be solved. Please also do not report known issues. The following is a useful format to follow.

What is your:
- Phone model (I9105 or I9105P):
- Radio (baseband):
- CM version:
- CM Download URL:
- GApps version:

Did you:
- Wipe:
- Restore with titanium backup:
- Reboot after having the issue:

Are you using:
- A task killer:
- A non-stock kernel:
- CMSettings/Performance settings (other than stock):
- Other modifications:

Provide any additional information (observations/frequency of problem/last version it worked on/etc) as needed:

Thanks

- The CyanogenMod team for providing a great ROM. Without all the compatibility work which went into it, this ROM would've been much harder to make

- [MENTION=3117667]pawitp[/MENTION] - for patches

- [MENTION=5456406]CoolDevelopment[/MENTION], [MENTION=5075128]LuK1337[/MENTION], [MENTION=5999439]GHsR[/MENTION] and other I9105/P and I9082 devs

- [MENTION=5390601]beegee[/MENTION]