yashsingh1/xdaforums huggingface dataset:
[Xiaomi Redmi 1S] dels07:
no ETA asking just glad to hear that it not discontinue...

about real life, yeah I know, I have work and family too :D, I could be your tester, how am I supposed to do that? give you logcat? kmsg?
[Xiaomi Redmi 1S] Normas Interruptor:
Please take your time for your own personal life.... we can wait ... as you know Armani has been released 5.1 also.. so i hope when you feel free, then you will make it your best kernel for it too.

Thanks DEV. have a great day ahead. :good:
[Xiaomi Redmi 1S] gummie:
Dudes seriously? You're still on CM11. We are all here on CM12.1 already and it's quite good as for just an initial build. The Memory Leak, [MENTION=3637908]kairi_zeroblade[/MENTION] already applied a kind of bandaid solution which is the ZRAM. Multitasking is pretty much decent since Build 4 for CM12. Now on CM12.1 the leak is quite non existant anymore as fixes from Google is applied, coupled with ZRAM you wont even feel even a slight of a leak. Anyway, I'm on Xcelerate CM12 build 5 on a CM12.1 and its quite a great experience, everything is working well except WiFi tethering. Multitasking is even better now with build 5 over CM12.1 R1.
[Xiaomi Redmi 1S] asurabp:
well for me im fine with cm11. cm12 and cm12.1 is not just for me yet.
[Xiaomi Redmi 1S] NikosGeo:
[MENTION=4380380]gummie[/MENTION], i've tried to install CM12 build 5 on CM12.1 and i always get bootloop. I use the xcelerate Kernel since day one, and i never had any problem.

Any suggestion would be valuable...

Thanks in advance!
[Xiaomi Redmi 1S] dels07:
could you confirm that background application or services closed automatically is gone in CM12.1 after several days of use? since I heard it would be fixed in 5.1.1
[Xiaomi Redmi 1S] gummie:
Somehow I just flashed it and it just booted successfully. I did not wipe anything. Lucky, I guess?

So far I haven't encountered any sudden apps closing with no warnings in CM12.1 R1.
[Xiaomi Redmi 1S] BATVIC:
Multi tasking it is working perfectly,

Background apps are not gone after several days.

5.1 is more smoother and better than 5.0.2
[Xiaomi Redmi 1S] BenSamte:
CM11 R25...

Been using the latest CM11 R25...easily the best one till now. No FC, random reboots till now. Initially tried flashing the last CM11 Xcelerate Kernel - successful, but WiFi stops working after that. But no worries as such - as the stock kernel is as good, if not better than the Xcelerate Kernels that I've been using till now....Those hesitant about CM11 R25, go right ahead & clean install, it's awesome right out of the box.
[Xiaomi Redmi 1S] adewisman:
+1 successfully installed xcelerate cm12R4 build5 on top cm12.1-R1 boot.img ;) and confirm wifi tethering is not working but I dont mind bcoz I rarely use it .

Ss attached
[Xiaomi Redmi 1S] travarilo:
Totally agree that it's such an awesome kernel for R25..the only thing has bothered me is the wifi..if it has been fixed, I guess it will be perfect.. :D
[Xiaomi Redmi 1S] NikosGeo:
I can confirm that xcelerate cm12R4 build5 has successfully installed on cm12.1. I just flashed it, I didn't perform any wipe! (The key is not to perform any wipe, just flash, as [MENTION=4380380]gummie[/MENTION] said.) WiFi tethering is not working.
[Xiaomi Redmi 1S] smart_thingup:
What kernel version you use ?

latest version for R24 or latest version for CM12 ?

I use R25 too, and I want to use this kernel again. But I wonder what version do I use for R25
[Xiaomi Redmi 1S] dels07:
using CM12 kernel on CM11 is a big no...he certainly use the one for R24
[Xiaomi Redmi 1S] Gkm91:
where is da dwnd link? :rolleyes:
[Xiaomi Redmi 1S] keliori:
He uses stock kernel R25, not Xcelerate.
[Xiaomi Redmi 1S] kairi_zeroblade:
Build for CM12.1-R1 is up!!

Sorry for the delay as I have to start out clean again..so it took me quite a while to set things up again.. ;)

I am in need for testers on CM11..Can't release untested stuff.. :(
[Xiaomi Redmi 1S] $îMpŁÿ_¢ØmPłİÇåŤęĎ:
I'll test it for u ;) :good:
[Xiaomi Redmi 1S] sherry_94:
I can test on CM11 R24 or R25

Sent from a Walkie Talkie
[Xiaomi Redmi 1S] adewisman:
Sorry can't test it for you mate, this godamn connection is driving mad tonight.... It took 5-6 min just to open this thread on xda app, some country I live in... LTE pantent owns by someone from my country (khoirul anwar) but still, we have the poorest net connection on south east Asia oh my god.... This is pain....

Sorry for the OT.

Ps : wifi tethering is working now thank you very much for the build.

Did I fail to upload the SS XD ? Sorry damn connection did this. Will upload it next time ...
[Xiaomi Redmi 1S] smart_thingup:
Waiting for R25 version to be release

I'm afraid R24 kernel version can cause problem when installed on R25

Or not ? Anyone ?
[Xiaomi Redmi 1S] asurabp:
Still on cm11. I can test
[Xiaomi Redmi 1S] travarilo:
It's not cause a problem, just the wifi issue..it's not working at all.. :p
[Xiaomi Redmi 1S] proseray:
Itz more than fast !
[Xiaomi Redmi 1S] BenSamte:
Stock CM11 R25 kernel bro....Xcelerate latest CM11 kernel renders WiFi inoperable....that's the problem....but as such not an issue..the stock kernel is very good this time around....
[Xiaomi Redmi 1S] kairi_zeroblade:
Bleeding edge.. :D

Can somebody who wants to test come with me on Hangouts..my tester is not Online.. -_-

I can't release unless this gets tested..
[Xiaomi Redmi 1S] justian:
cant install kernel

How to install this kernel.

i can install the old version like for cm11 R16 , but for the latest i cant even install it, i tried using TWRP, Phillz recovery, the process said succesfull but my kernel didnt change.

Thanks
[Xiaomi Redmi 1S] adewisman:
First be sure you are using latest twrp, use twrp manager from play store and download and install the latest recovery img

2nd exctract boot.img from your cm11 zip file, use esfile explorer for this.

3rd reboot to recovery and install the boot.img change the file choose criteria from zip to img, bottom right corner button!!

4th install xcelerate zip file

5th wipe cache &dalvick .... reboot

6th install synapse on playstore as it is the only kernel manager that supported by this kernel

Done.... enjoy xcelerate

Sent from Indonesia`s poorest internet connection in south east asia XD :good
[Xiaomi Redmi 1S] kairi_zeroblade:
CM11 production build 16

CM11 build uploaded..its on the same Download link..

Thanks to the volunteers who tested for me.. :D
[Xiaomi Redmi 1S] Zeehan:
Works like a charm on R25. Thank you [MENTION=1371975]kairi[/MENTION]zeroblade. Much appreciated.

I'm really excited about the cpu boost which came in the previous versions too, but I want to try it out now.

If you don't mind can you please tell me what does it exactly do in laymans terms :p

Do I need to tweak it? Or should let it be.?
[Xiaomi Redmi 1S] kairi_zeroblade:
well CPU Boosting is meant to give you a smooth user-experience by boosting the Online CPU's to a certain frequency when there's interaction with the phone..I suggest leaving it as it is..as its tweaked to be optimal for your phone..but feel free to experiment..
[Xiaomi Redmi 1S] militantmind:
Cm12.1 kernel is backward compatible with cm12.0 :)
[Xiaomi Redmi 1S] akhilkumarco007:
For the first time installing this kernel is causing bootloop in my phone ... :( should I install this on cm12.1 boot.IMG or just wipe cache and data and then flash this?
[Xiaomi Redmi 1S] BATVIC:
You should flash it on clean cm12.1 r1 boot.img,so only it will work.
[Xiaomi Redmi 1S] Normas Interruptor:
I cannot set CPU frequency Min. 300 and max 1194 after flashing xcelerate kernel in 12.1 Armani Android 5.1 build.... please tell me the way ...

It's always sets Min. 300 and max 1300.
[Xiaomi Redmi 1S] phreakenstein:
So any reviews for xcelerate on cm12.1?
[Xiaomi Redmi 1S] adewisman:
Just use synapse to manage the kernel else it wont work download it from playstore

One word for the rom and the kernel..... Awesome ..... Just try it mate wont regret.
[Xiaomi Redmi 1S] somu1795:
will the xcelerate for cm11 work for miui v6 on redmi 1s?
[Xiaomi Redmi 1S] adewisman:
Already tried mate, even using compabilty patch and miui firmware, it just didnt work.. The kernel booted up but the screen went crazy, we think it because miui using different type of screen driver on its build.
[Xiaomi Redmi 1S] somu1795:
yes I saw the exact same problem !

isnt there some solution??
[Xiaomi Redmi 1S] rocknegi:
Anyone facing bootloops ?? I am facing it after installing kernel ...

press thanks if I helped u :)
[Xiaomi Redmi 1S] BATVIC:
Which rom are you using?

Whether you flash the kernel on top of the cm boot.img?

Use the latest version of TWRP recovery...

I'm flashed the kernel on top of cm boot.img for me working without boot loops..
[Xiaomi Redmi 1S] rocknegi:
ROM cm 12.1

Twrp 2.8.6.0(latest)

On top of boot.IMG

The phone starts but after free seconds it restarts again this is happening

press thanks if I helped u :)

---------- Post added at 06:24 AM ---------- Previous post was at 06:13 AM ----------

How to get rid of this and music app crashing

press thanks if I helped u :)
[Xiaomi Redmi 1S] adewisman:
For the kernel installation dont wipe anything before and after the instalation sequence ( boot.img and then xcelerate zip) if you install it on cm 12.1

Use other app for music, poweramp works flawleslly on my side using service and wakelock option.. , for detected double media file, just clear the cache and data of storage media on app setting reboot directly after that. Hope that solve your issue ...

Just IF clearing media storage data and cache doesnt solve your issue..... Just back up all your pic and song with other data on your sdcard to pc. And then format the sdcard ... And then restore the backup file from your pc using usb mtp connections.

Sorry for The Off topic btw it is rom issue not kernel issue again sorry.... But people might find this useful
[Xiaomi Redmi 1S] BATVIC:
Sorry i can't help you I'm using the kernel with aicp,for me working flawlessly.

Again try a clean install,if it is rebooting ask kairizeroblade

Use a third party music player,

I'm using google play music,for me it is not force closing,
[Xiaomi Redmi 1S] Normas Interruptor:
It's working now.... Thanks :) :good:
[Xiaomi Redmi 1S] :
Which version of this kernel I can install on ultimate lollipop ROM?
[Xiaomi Redmi 1S] adewisman:
Never heard anyone reported it works on KK AOSPA Rom, afaik, cmiiw, try the latest xcelerate for CM11, maybe it will works or may be it wont, do give feedback if you succeeded on installing/not

TIA
[Xiaomi Redmi 1S] smart_thingup:
Have no problem with latest kernel for R25

Wifi is also work normally
[Xiaomi Redmi 1S] aqirul2411:
4.4.4

im on N5X kitkat, rc9.3, what kernel version can i flash? bootloop
[Xiaomi Redmi 1S] akhilkumarco007:
no matter what i do my phone is stuck on bootloop im forced to use the stock kernel that comes with cm12.1 and i wanna use xcelerate .... :crying: i tried with and without wiping and even tried to install the kernel on stock boot.img but no use :crying:
[Xiaomi Redmi 1S] adewisman:
Are you sure it is a bootlop you are mentioning, cause it took longer to boot on art than it is on dalvik. if you sure it is a bootlop, try this method of Instalation.

1. Back to recovery force it by pushing power + vol up while on bootlop

2. Install CM 12.1 Zip

3. Install Xcelrate CM12.1 build 1

4. reboot

5. install synapse from playstore.

hope that fix your issue, please do leave feedback after that thanks in advance
[Xiaomi Redmi 1S] akhilkumarco007:
what about gapps?
[Xiaomi Redmi 1S] adewisman:
No need to, it will be there as it basically dont wipe anything on system partition, else just to be sure you can also install the gapps along the way.. such as after installing xcelerate..
[Xiaomi Redmi 1S] BATVIC:
Got a awesome battery backup in aicp 5.1 + xcelerate
[Xiaomi Redmi 1S] bilakos10:
Mate, post the screen on time screenshot as well!
[Xiaomi Redmi 1S] otterbvrn:
Is build 16 compatible on cm11 r26?

Since the changelog is not too much changing on system..

Or is it any the finale kernel also for cm11?
[Xiaomi Redmi 1S] adewisman:
Can you do us a favor to at least try it mate, and give some logs after installing wheter it is successful or fail one will be much appreciated, thanks in advance

Methode of install ..

Wipe cache & dalvik > install clean stock boot.img from R26 > instal xcelerate > wipe cache & dalvik > reboot.. Just install the rom again if you find it on bootlop with cleaning the cache, force reboot to recovery by pushing + vol up for a few seconds while on bootlop to get to twrp again.
[Xiaomi Redmi 1S] otterbvrn:
yeah i know, just want to make sure since this is the last version of cm11
[Xiaomi Redmi 1S] BATVIC:
I didn't take a screenshot of that,

But i got a 3hr 28mins screen on time.
[Xiaomi Redmi 1S] vivek.santhosh:
is msm hotplug enabled by default?

im using the lollipop build 5
[Xiaomi Redmi 1S] adewisman:
So do I
[Xiaomi Redmi 1S] jpnazar08:
is this kernel works on cm12.1 r2?
[Xiaomi Redmi 1S] adewisman:
Yes I'm using it atm ss:

https://copy.com/saDjVGPKx39fe7A1

https://copy.com/7s9so9LiScqAnms3
[Xiaomi Redmi 1S] jpnazar08:
thanks let me try

---------- Post added at 12:48 PM ---------- Previous post was at 12:31 PM ----------

it works but can you tell me why my signal bar have exclamation point " ! "
[Xiaomi Redmi 1S] adewisman:
Idk mine working perfectly fine, have you update your firmware to the latest from Miui V6, if not try to update it mate, either by installing miui V6 global rom or using this zip https://copy.com/FwgPNyhSPWflSR0T I archived it from miui beta V6 official just install it on twrp no need to wipe anything
[Xiaomi Redmi 1S] asurabp:
in lollipop, with exclamation point has no internet connection.
[Xiaomi Redmi 1S] jpnazar08:
Oh i see thanks
[Xiaomi Redmi 1S] zacutesz:
After an hour using Xcelerate kernel R24 on cm11 R26 i feel no lag anymore but when i try to open app game like Respawnables it's blank.
[Xiaomi Redmi 1S] kairi_zeroblade:
New builds up!!

Grab it from here (git updated)

For CM12.1-R2

CM11-R26 gets updated later this morning..
[Xiaomi Redmi 1S] arunal_123:
Xcelerate for CM12.1 r1 worked flawlessly on MK51.0 experimental (Mokee 5.1 ROM).

Just posted to let people using Mokee L know that it worked.

Now will test this build too...

Thanks kairi...
[Xiaomi Redmi 1S] akhilkumarco007:
i had to revert back to first build as this one caused bootloop :( is it only me?
[Xiaomi Redmi 1S] bilakos10:
It boots up fine. Make sure to wipe system(only) , flash rom, gapps and kernel.

Your data will stay intact.
[Xiaomi Redmi 1S] adewisman:
Already tested, no bootloop, dont wipe anything on installing, install stock boot.img and then xcelerate reboot... Done
[Xiaomi Redmi 1S] phreakenstein:
Well, for a lot of people, this improves performance and battery. But the best way to learn in flashing and modding is by trying it. As long as you can find your way back to recovery, just go ahead and flash it. But of course, FOLLOW THE INSTRUCTIONS.
[Xiaomi Redmi 1S] deadlyindian:
CM11 R26 ?
[Xiaomi Redmi 1S] funtikar:
Im currently using FIUI 2.16 for Redmi 1s its based on CM11.

I know it probably has problem in incompatibility but If I wanted to use Xcelerate kernel... which should give the best compatibility?
[Xiaomi Redmi 1S] adewisman:
One day cycle on Xcelerate CM12.1 R2

Got 5hours 30 minute Screen On time.

In more than 13 hours battery cycle

With bat. Temp. 30-35 Celsius

With cpu ramping from deepsleep to 1,2 ghz

Without lags playing kritika and fifa ut 15 for some minutes and most of the time forum reading.

hats off for [MENTION=3637908]kairi_zeroblade[/MENTION] for his dedication on this device regardless he doesnt own the device yet... (May be he wont as xiaomi releasing redmi 2 now :( )

Thank you very much mate
[Xiaomi Redmi 1S] kairi_zeroblade:
Kitkat Build is being tested..sorry for the inconvenience we just had issues with testers.. :D hopefully passes test and we get it to be released this morning.. ;)

[MENTION=5103250]adewisman[/MENTION]

How come we're the only ones posting battery life results with real-life use here??
[Xiaomi Redmi 1S] adewisman:
No idea mate .... Hmmm nah lol can't answer it, you guys please help me here .... [emoji4] [emoji4] [emoji4]
[Xiaomi Redmi 1S] vivekchamoli:
Latest cm12.1 kernel working flawlessly with mokee ROM 5.0.2 release 150413 . great work
[Xiaomi Redmi 1S] deadlyindian:
Thanks for the heads up, will be waiting on the update :)
[Xiaomi Redmi 1S] akhilkumarco007:
stuck at mi logo

no matter what i do my phone will be stuck at the mi logo and doesnt go forward even if i wait for hours :crying: i did everything mentioned in this thread and i didnt have any issues while using earlier versions :confused: :(
[Xiaomi Redmi 1S] adewisman:
What Rom are you using now ? And which build did you try to use mate ??? Fyi For CM12 up dont wipe anything prior or after the installation sequence (install stock boot.img and xcelerate zip) if you wipe the cache it will cause bootloop, just back to the recovery(push power button+vol up for few second while on bootlop) install the rom zip again and then xcelerate reboot. Hope that help
[Xiaomi Redmi 1S] akhilkumarco007:
im using cm12.1 r2 and build 7 for cm12.1 and tried what u said but no use .... even with clean install my phone failed to boot :crying:
[Xiaomi Redmi 1S] AyaAn724782:
Can any1 Confirm dis kernel Working or Not On Mokee 5.1 ?
[Xiaomi Redmi 1S] adewisman:
Bro it just a page back someone confirming it works :) please do search before ask :(

http://xdaforums.com/showthread.php?p=60156527

Hmm wonder why ... Just install the rom without xcelerate mate until it properly boot up and able to be used , and aftet then you can try to install xcelerate if I may suggest

Ps : it took me 20 minutes with 150+ apps to boot LP from installation to CM lock screen
[Xiaomi Redmi 1S] BATVIC:
My one day usage with r2+xcelerate.

Got an awesome battery with this kernel.:D

:thumbup::thumbup::thumbup:

https://www.dropbox.com/s/fpm3bzlqojm2hq5/Screenshot_2015-04-17-23-28-21.png?dl=0

https://www.dropbox.com/s/30umuy5vny3cinj/Screenshot_2015-04-17-23-28-28.png?dl=0

https://www.dropbox.com/s/koemhrvwqfi2ev3/Screenshot_2015-04-17-23-28-34 (1).png?dl=0
[Xiaomi Redmi 1S] adewisman:
Fix it for you mate

Still not showing hehehe try
http://imagebucket.net
mate
[Xiaomi Redmi 1S] bilakos10:
CM12.1 + Xcellerate latest build

27 hours standby, 2:15 hours music playback (using rocket player - with screen off ofc) + 50% battery left

I will post my kernel settings tomorrow!
[Xiaomi Redmi 1S] JJPahalla:
this is the first kernel i tried for my redmi. battery life is really good, im 12hrs on battery power and there's still 52% left. thats with GPS radio on all the time and WIFI radio on for most of the time. though that's for average use of the device.

i do however experience some micro lags from time to time and camera is lagging like hell, unless i reboot the phone before i use the camera. i dunno if this is a kernel or cm11 issue. im also suspecting that the microlags is not related to kernel or rom at all. it may be because of what they call lack of TRIMMING of the phone's sd card. i have ran the LagFix app, and it improved, but there is still minor lags from here and there and camera was not solved.

i will definitely wait for the update, and thank you so much dev for your effort in this kernel :good:
[Xiaomi Redmi 1S] DeLonge:
thank's for your work, everything run smoothly on my phone.

one thing I concern that is regarding battery drain during deepsleep. Or maybe I just need more cycle on my phone (already run 2 cycle => from lowbat to full).

or maybe if I can give some help (like logcat or something), I'm gladly willing to help. Just tell me what should I do :p
[Xiaomi Redmi 1S] BATVIC:
Beast kernel is working in cr droid b4,but this kernel is not working any tell how to flash??
[Xiaomi Redmi 1S] xylu:
Try one of these:

1. wipe cache/dalvik after flashing kernel then reboot..

2. Flash build1 after the phone boots up, flash build2 wipe cache/dalvik every after flash then reboot

Sent from my HM 1S
[Xiaomi Redmi 1S] bhu1:
The update will help u get even better battery life with really smooth, stable and consistent performance. ;)

---------- Post added at 08:54 PM ---------- Previous post was at 08:52 PM ----------

U should, no harm in providing the logcat, always provide logcat without the dev asking u specifically. Really easy to provide logcat, option for it in synapse app.

---------- Post added at 09:00 PM ---------- Previous post was at 08:54 PM ----------

Also try flashing the latest twrp, 2.8.4.0, and then try reflashing the kernel.
[Xiaomi Redmi 1S] baso53:
After a completely fresh install of Cyanogenmod and this kernel Wi-Fi worked just fine, I installed all the apps that I need from the Play Store. I installed Synapse, rebooted and suddenly Wi-Fi doesn't work. :(
[Xiaomi Redmi 1S] Ferhat78:
Build1 and build 2 ? ? ? ? ? This kernel its not working for me and plz set cpu max to 1800
[Xiaomi Redmi 1S] bhu1:
What exactly happens, does it not even switch on ? Or does it not connect ? Try reflashing, maybe try flashing the latest twrp and flashing kernel after that.
[Xiaomi Redmi 1S] baso53:
It doesn't even switch on. When I click the button, the "lever" switches to the ON side, but it's kind of greyed out.

I flashed with the latest TWRP, but from my experience I think it got pretty buggy. Strange errors pop up sometimes so I'm not quite sure if it did the job or not. Also, for some reason it can't flash any MIUI rom. Version 2.7.1.1 always gets the job done, but it doesn't have the MTP option which is really helpful sometimes.

Nevermind though, I'll be testing other kernels for now.
[Xiaomi Redmi 1S] bhu1:
There is a new TWRP 2.8.4.0 out, did u try that ? This WiFi problem is one that I haven't faced on this kernel but I did face on other kernels.

---------- Post added at 12:19 AM ---------- Previous post was at 12:16 AM ----------

Build 1 is a previous version which isn't available anymore on the download page and no, proper OC to 1.8 just isn't possible at this stage of dev and isn't even required.
[Xiaomi Redmi 1S] baso53:
I know, I used 2.8.4.0.
[Xiaomi Redmi 1S] Ferhat78:
I flashed but its not working with cm11 r15
[Xiaomi Redmi 1S] bhu1:
What ? The kernel or the WiFi after flashing the kernel ?

---------- Post added at 12:47 AM ---------- Previous post was at 12:44 AM ----------

Hmmm....I can't suggest u anything else except a fresh wipe and reinstall of kernel which I don't think u will be willing to do, sorry. This WiFi problem is really random and happens to some on some kernels and happens to others on other kernels. I am yet to face such a problem on this kernel.
[Xiaomi Redmi 1S] kairi_zeroblade:
New release is Coming its way now..

Includes fixes from mainline CM..also a few stuff we have been working yesterday..

This post gets edited when Updates are ready!!
[Xiaomi Redmi 1S] xylu:
appreciate your work and continuous update, if it's not too much to ask, can you also please update for the latest CM 11 R16 build with fix touch during call?
[Xiaomi Redmi 1S] gummie:
The Dev said

He's actually on it as we speak.
[Xiaomi Redmi 1S] agmtpd:
please implement gamma control.. this is the only thing holding me back from using this kernel.
[Xiaomi Redmi 1S] bhu1:
Yup, he already did that. Just wait for the update.
[Xiaomi Redmi 1S] faraaz3:
Plz implement under volting bruh ??
[Xiaomi Redmi 1S] gummie:
As I said, the Dev is already working non stop on the recent changes implemented on CM11 R16. See attached screenshot of the test build I'm in to.
[Xiaomi Redmi 1S] Giancop92:
I'm using cm12.1 r2 but i flash the kernel and it doesn't change.:(

How can i install it? Someone can help me
[Xiaomi Redmi 1S] adewisman:
Use latest twrp (afaik it is 2.8.6.0) ... Extract boot.img from cm12.1R2 zip... Download xcelerate put the boot.img and xcelerate zip in a same folder incase you forget where you put it....

Reboot to recovery (twrp) install the boot.img (change the file type criteria from zip to img using twrp file choose button criteria bottom right corner) choose boot install... Install xcelerate zip (change the button criteria to zip again) reboot to system ....

Please made sure you already have a working cm 12.1 R2 !!

Note: dont wipe anything and please backup your things before doing this DWYOR