[HTC Pico (Explorer)] kirmaniarslan:
Changelog :-

CyanogenMod 12.1

Beta#1 03/06/2015 :

- Lollipop 5.1.1

- CM-12.1 Upstream

- Fixed Deepsleep issue

- Disable dialer lookup by default

- Switched to QCOM power HAL

- Added LZ4 Compress/decompress support

- Update zram and zsmalloc up-to 3.17 kernel changes

- inherit media_codecs_google_video_le.xml better for low end devices

- update ril.h for 5.1

- Disable dex2oat watchdog

- Don't disable jit cache

- Set dalvik.vm.dex2oat-filter=balanced

- Disabled LTE as our device doesnot support it

- Update Audio policy for 5.1

- Call broken and Wifi Calling fixed

- Increase ZRAM swap size to 192MB

- fixed heatset and Data connection problem on kernel level ( no patches needed )

CyanogenMod 12.0

Beta#3 02/03/2015 :

- CM Upstream

- Fixed Data Connection

- Fixed Headset thanks [MENTION=4869275]thewisenerd[/MENTION] for fix

- Fixed MTP connection with PC

- Enabled WITH_ART_SMALL_MODE you can read it more here : http://source.android.com/devices/tech/dalvik/configure.html#with_art_small_mode

- Symlink dalvik-cache to nand for performance and also decreases the battery usage ( u can see it as sd-ext in recovery for cleaning it )

- Disabled data encryption

- Updated audio_policy.conf from HTC one M7

- Set sd cache to 1MB

- Enable LOGD

- Using NuPlayer instead of Awesome player

- Based on Aw3some mod thanks [MENTION=4869275]thewisenerd[/MENTION]

- Gapps Lags Fixed

- Headset profile update from DX kernel 3.4

More Kernel Changelog

Beta#2 29/01/2015 :

- Cm Upstream

- Fixed GPS

- F2FS support in kernel and device tree added for /system and /data partition

- Fixed Sound Recorder

- Enable cortex a9 optimization

- Update HtcMsm7x27aRIL class

- Disabled alpha trasformation in animations

- Added New CPU GOV Intelliactive and set it to default governer

More Kernel Changelog You can Check from HERE

Beta#1 20/01/2015 :

- CM Upstream

- Fixed Camera (Still camcorder is broken )

- Setup for chromecast support.

- Lowmemory killer tweaks to fix oom issues

- Sepolicy inherit from common qcom sepolicy

- Force camera API to version 1

- Updated partition layout

- Set background process to 4

- Inherit dalvik-heap props with 512mb ram (This fixes browser Image Cache problem)

- Enable SystemUI flags to optimize performance

- Builtin bcmdhd module in kernel to fix loading and unloading issues

- Add custom HtcMsm7x27aRIL to fix SignalStrength on gsm

- Disable TARGET_CPU_SMP

- Disable Atlas service

- Cleaned up system.prop

- Disable JIT

- Configure ksm with low ram

- Allow legacy allocations from MM heap

Alpha#2 - 28/11/2014 :

- CM Upstream

- Enable dex-preoptimization to speed up first boot sequence

- Patches for performance Much stable and faster now

- SELinux Support : Set to Permissive mode

- Temp fixed soft reboots

- Forced high-end graphics for transparent lockscreen and statusbar

- Ril fixed GSM working but data connection is not fixed

- Added FFMPEG codec configuration

- Added SELinux support in kernel

- Disabled kernel features

- Added Multi User support upto 4 users allowed can be enabled with ( ro.config.low_ram=false in build.prop )

- Using Awsome Latest layout

Alpha#1 - Nov 19, 2014 :

- Initial upload

- Updated Libaudio

- Disable LOGD

- Enabled Minikin fonts

- Display and Media hals based on msm8960 with some hacks for msm7x27a

- Used dlmalloc instead of jemalloc

FAQ :-

Q: Why SD-ext and what is Partition layout ?

Ans:There is not much space in system partition even with awsome partition layout and secondaly here is the partition layout

/dev/block/mmcblk0p3 mounted as /system i used this partition so that you dont have to create partition again and again

/dev/block/mmcblk0p2 mounted as /data

Q; How Can I clean my sd-ext partitons ?

Ans : you can flash this before flashing rom http://xdaforums.com/showthread.php?t=2392001

Q: I am stuck at HTC splash screen what to do ?

Ans:Simply Take out boot.img from Rom zip and flash it in fastboot mod

Fastboot flash boot boot.img

Q: I can't find developer options and performance settings, why?

A: Settings -> About phone -> Click 'Build number' several times

Q. No ROOT access WTF ?

Ans : Enable it from Developer option