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[ROM] [5.0.2] [EXT4/F2FS] [LINARO] [03/22/2015] UNOFFICIAL CyanogenMod 12 [DDK 1.8]

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Senior Member
Jun 25, 2008
New York
UNOFFICIAL CyanogenMod 12 for the Samsung Galaxy Nexus

This is an extension of my original project from the Verizon forum built for maguro. Since the only device I own is a toro, I will not be able to personally test cellular data and telephony features, so I will rely on user feedback (at least initially) just to make sure everything works!

I first decided to put together this 5.0 ROM using the old graphics drivers for those of us who wished to try Lollipop, but needed full camera functionality (i.e. barcode scanner apps, or any other app that uses the camera API). At this point, it looks as if the camera has been fixed to work with the newer GPU drivers. I will continue to develop this ROM using the older drivers until all of the major kinks are worked out (both DDK and non-graphics related included) and we have a 100 percent stable release. You are welcome to try my build which does offer some unique features and will continue to be improved upon and synchronized with the CyanogenMod sources.

Please note that you can NOT use any other kernels with this ROM!! I have added a number of additional features to the kernel including custom voltage, fast charge, and color adjustment so hopefully that will satisfy enough for the time being.

I welcome any and all feedback, including bug reports and feature requests. The Galaxy Nexus is my main phone, and this ROM has been stable enough to be my daily driver since I began developing it.

Features Specific to this ROM

- Built with Linaro GCC 4.8 toolchain with O2 optimizations
- F2FS support for /data and /cache. System must be ext4.
- LegacyCamera app included (more stable and lots of features)
- Lower screen brightness during boot sequence (if you wish to disable this, delete or modify etc/init.d/96screendim)
- Adjusted minfrees for better multitasking
- Xposed for Lollipop compatible
- NEW: Specify maximum number of recent apps through build.prop key

CyanogenMod Features

- Better AppOps, including the ability to block wakelocks and alarms.
- Status bar mods (brightness control, weather, battery icon style, double-tap to sleep)
- Navigation bar customizations
- Button mods (volume wake, volume cursor)
- Color/Gamma calibration
- Battery light enable/disable
- CyanogenMod DSP
- Scramble for PIN layout on lockscreen
- Advanced reboot menu
- Charging LED ON/OFF
- Theme Manager
- Additional Quick Settings tiles (ADB over network, compass, profiles, NFC, hotspot)
- and more!!!

Kernel Features

- Built with Linaro GCC 4.9 toolchain with O3 optimizations
- CPU frequency slots: 230-1500Mhz
- CPU governors: dyninteractive, interactive, conservative, ondemand, userspace, powersave, performance
- Min Screen On / Max Screen Off
- I/O scheduler: row, zen, noop, deadline, cfq
- TCP congestion control: cubic, reno, bic, westwood, htcp
- Fast Charge
- GPU Overclock
- IVA Overclock
- SmartReflex: Core, IVA, MPU
- SmartReflex: Min calibrated voltages
- Custom Voltages
- Custom Regulator Voltages: VAUX3_6030, VAUX1_6030, VMMC, VANA, V2V1, VDAC, VCXIO, VUSIM, VMMC, VUSB
- Color Settings (gamma offset, color multipliers)
- I/O Accounting (see this post for more information).
- Vibrator Intensity
- Sound Control (High Performance Sound / Headphone Volume Boost)


First flash:
Unlock & install a recovery
Wipe data & cache partitions
Flash CM-12
Install the Google Apps package

Make a backup in recovery
Flash CM-12
Install the Google Apps package

If you are using F2FS, boot will hang for a bit longer on the Google Logo before animation starts.

Initial boot will take longer than it does with other 5.0 ROMS because this ROM is deodexed. My main reason for doing it this way is so that I can make modifications to individual framework files without having to flash the entire /system partition. The downside is that the initial boot after a wipe of the dalvik-cache will take marginally longer because it has to rebuild the caches for all of the system apps. If you do this while you still have a full compliment of user apps installed - i.e. after an upgrade, the boot sequence could take a REALLY long time - so be prepared for that. Personally, I feel that this is a small enough inconvenience and the benefits outweigh the drawbacks.


Latest Build

Google Apps: [GAPPS][5.0.x][BETA] OFFICIAL Up-to-Date PA-GOOGLE APPS

Recommended Apps
TouchControl (choose "Ponury Stock Modified" kernel module)
3C Toolbox
Trickster MOD Kernel Settings
Ultimate Dynamic Navbar

Tips / Recommendations

The stock/Google Camera app may crash if started in video mode. It takes still photos just fine, but tends to force close every now and then if you switch out of the app while in camcorder mode requiring a system reboot to restore camera functionality. Snapshots taken during video recording are corrupt. I recommend using the Legacy Camera (the one that looks like a real camera) for now, which will also allow you to take perfect still captures while recording video.


- charging text stuck on the lockscreen
- camcorder records video with green lines. Best results are with 1080p*
- Google Play Movies & TV will not stream, but if you download the movie first it will play.
- gesture typing doesn't work on stock keyboard but does work on Google Keyboard

*Videos recorded @ 1080p and 720p are now automatically cropped to remove the persistent green band along the width dimension. This can be disabled through build.prop: debug.video.crop_override=0. Please see this post for details.

I'm not responsible for bricked devices (honestly, has anyone actually ever bricked a GNexus?), data loss, lack of rhythm and coordination. Please remember to ALWAYS make backups before you flash and if you are changing filesystems on /data, you will lose ALL DATA which includes everything on internal storage and the recovery will NOT give you any warning before it performs this highly destructive act, so just be aware! Thanks and enjoy!

Thanks To/Credits

XDA:DevDB Information
[ROM] [5.0.2] [EXT4/F2FS] [LINARO] UNOFFICIAL CyanogenMod 12 [DDK 1.8], ROM for the Samsung Galaxy Nexus

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

ROM OS Version: 5.0.x Lollipop
ROM Kernel: Linux 3.0.x
Based On: CyanogenMod

Version Information
Status: Alpha
Beta Release Date: 2015-03-22

Created 2015-03-23
Last Updated 2015-03-23