Kernel sources finally - Mi 3 General

Hi people,
Finally sources are released, great news, this time they wasn't lying!
Here they are for cancro :
https://github.com/MiCode/Xiaomi_Kernel_OpenSource/tree/cancro-kk-oss
Regards!
Edit : just wait I guess they are uploading everything.

ATLAST!!!!!!!!!
YEAHHHHHH READY TO FLASH STABLE CUSTOM ROMS.....:fingers-crossed::victory:

Finally they released sources
Sent from my MI 3W

Sagar.Shwrmni said:
Apart from few bugs being fixed, will these sources mean anything more ?
I mean developers have already given us some really amazing roms without the kernel.
Click to expand...
Click to collapse
Devs were using ivan's kernel, and by using this kernel they got nearly the same bugs as ivan's build (like no hdr, a little bit overexposed pictures in normal mode).
We may see custom kernels that support cpu clock modifications or voltage modifications.
Envoyé de mon MI 4W en utilisant Tapatalk

Somebody knock on Franco's door and start porting his kernel. :3

Remember that the kernel released is still on KK.

bluerain28 said:
Remember that the kernel released is still on KK.
Click to expand...
Click to collapse
Yes I know, so have to make some documentation.

its good to know that kernel sources are released . having a small confusion i have read its only for KK...
so is it possible for the developers to build a lollipop rom using KK kernel.

Please use existing thread for this subject,
http://forum.xda-developers.com/xiaomi-mi-3/general/kernel-sources-hugo-barra-update-t2900843
Thread closed.
Thanks,
Darth
Forum Moderator

Related

SGP 5.0 + PAC latest nightly

Hi,
I'm not sure if this is the right forum or not but I've been using the PAC MAN rom nightlies now for some time now until the recent update on the 14-15th when I got stuck in a bootloop and had to revert back to the 10-09 nightly. after doing a lot of research I found that the reason for this seems to be an issue with the overall update to jb 4.3.1 and there is a kernel side fix that needs to be done.
basically what I'm asking is if there is anything I can do on my end to resolve this or if I have to wait for someone who develops kernels for the US variant of my device to fix it on their end?
I'm using the SGP 5.0 US (non physical button variant) with sultan kernel v6b2 and pac 10-09-2013 nightly currently if any of this info helps at all.
luraziel said:
Hi,
I'm not sure if this is the right forum or not but I've been using the PAC MAN rom nightlies now for some time now until the recent update on the 14-15th when I got stuck in a bootloop and had to revert back to the 10-09 nightly. after doing a lot of research I found that the reason for this seems to be an issue with the overall update to jb 4.3.1 and there is a kernel side fix that needs to be done.
basically what I'm asking is if there is anything I can do on my end to resolve this or if I have to wait for someone who develops kernels for the US variant of my device to fix it on their end?
I'm using the SGP 5.0 US (non physical button variant) with sultan kernel v6b2 and pac 10-09-2013 nightly currently if any of this info helps at all.
Click to expand...
Click to collapse
So far I don't think you can do something at the moment to fix this. Are you using sultan perhaps? If so then he have to fix his kernel so it can work with pac again.
zaclimon said:
So far I don't think you can do something at the moment to fix this. Are you using sultan perhaps? If so then he have to fix his kernel so it can work with pac again.
Click to expand...
Click to collapse
yeah I'm running the latest sultan kernel for US players. I've recently been looking into how to build my own kernel also. figuring maybe there would be a way to update either an existing one or making one of my own (although I doubt I could make one as good or better then those out there right now lol)
either way I went back to gingerbread for the time being with the ACkernel that works for it until a kernel can be updated/modded/whatever...
just out of curiosity though. do you know what aspects of the kernel I would have to edit to allow for 4.3.1?
luraziel said:
yeah I'm running the latest sultan kernel for US players. I've recently been looking into how to build my own kernel also. figuring maybe there would be a way to update either an existing one or making one of my own (although I doubt I could make one as good or better then those out there right now lol)
either way I went back to gingerbread for the time being with the ACkernel that works for it until a kernel can be updated/modded/whatever...
just out of curiosity though. do you know what aspects of the kernel I would have to edit to allow for 4.3.1?
Click to expand...
Click to collapse
Well the pac team modified some thing concerning the init.rc so the custom kernels would need to incorporate it. However, the stock kernel within the build should work no problem as its most likely nightlies.
Envoyé depuis mon Nexus 7 avec Tapatalk 4
zaclimon said:
Well the pac team modified some thing concerning the init.rc so the custom kernels would need to incorporate it. However, the stock kernel within the build should work no problem as its most likely nightlies.
Envoyé depuis mon Nexus 7 avec Tapatalk 4
Click to expand...
Click to collapse
I looked into the kernel that the nightlies provide but they are all international versions of the device, and currently the Us rom they offer is an older version from back in September.
I'll look into the init.rc file though. hopefully it wont be too difficult. looking at some basic code for kernels and stuff it doesn't seem like it will be much harder to understand than the LUA was for making wow add-ons

[DEV][PORTING]Linux 3.4.x/3.10.x/3.12.x Kernel for I9300

Hey guys!
As you maybe know, we have the newest Android 4.4 but only a 3.0 Kernel. But we need the newer versions since Android is based of this new ones and if the gap between our version and Google's version is too big, it will take a long time to reach this. So i would say: "We need a newer kernel, let's go for it!" and i wanted to know if anybody is willing or if somebody is even able to port the 3.4 (or a newer version like 3.10 or 3.12) to our device to get better performance and to be safe to get all updates. If anybody is able and wants to help, please write it here or PM me. Also we should form a dev team to have the control over this project.
So if anybody is willing to, I will really appreciate it. I start this project on my own and you can join in to help and contribute your knowledge to this project. I will provide more info if needed. And yes, I know that it will be difficult but it is possible to reach the target.
Greets and best regards,
markey
If you want, have a look over here:Thread in development discussion section
Edit1: As i've seen in the poll, everybody (till now) wants the 3.4 kernel to be ported. So I have another question: Do you want me to port the 3.10 (or higher) Kernel also, after the 3.4 is running stable?
If yes, just write at the end of your post. Thanks. :good:
Edit2: I have decided to start porting the 3.1x+ Kernel based on dorimanx' sources first and then will try to port 3.4 cause 3.4 will have a better ability to be well integrated into Android till now and 3.10+ will take us one step further and keep us on track for the next Android versions which will be propably based on 3.8 or 3.10 Kernel.
If you have questions what this upgrade will (roughly) bring us, have a look at my last post in this thread.
This is great. It will be HARD, but, worth it. Just, maybe, this will see completion one day. I'll copy in kernel devs if I were you.
@DerTeufel1980
Sent from my Omni 4.4 Galaxy S3. Proud Googy Beta tester.
Great to see this! We need 3.4.x kernel!!
Regards :good:
Yes we can
tapatalked with my i9300
ROM: CyanogenMod 11
Kernel: Googy-Max2 (r3p2)
Googy to the rescue?!
Sent from my Omni 4.4 Galaxy S3. Proud Googy Beta tester.
It will be great!!!! Good luck, man:good:
Yes. Its gsear. Wait!!!
Sent from my GT-I9300 using XDA Premium 4 mobile app
Let the fun begin
Envoyé de mon GT-I9300 en utilisant Tapatalk
This a is a great quest ... my props to the dev !
About kernel
3.4 would be amazing
3.10/12 more than we ever could ask
Thanks for u guys doing what samsung never cared to do for us
Enviado do meu GT-I9300 através de Tapatalk
googy_anas said:
Let the fun begin
Envoyé de mon GT-I9300 en utilisant Tapatalk
Click to expand...
Click to collapse
We have lift off!
Sent from my Nexus 7 (2014) using Tapatalk. My mobile is an Omni run Galaxy S3.
Stunning idea! I just wish I already had the knowledge and the time to help, but I really hope this takes off!
edit. go for 3.10-3.12 of course, the Sky's the limit, but 3.4 is a good stopgap as it runs on similar Samsung-devices ...
Someone could try merging dorimanx smdk4210 (s2) Kernel. He has already merged most of 3.13, and our s3 kernel is also working for s2, after cm had merged some parts.
Gesendet von meinem SAMSUNG-SGH-I317 mit Tapatalk 2
DerTeufel1980 said:
Someone could try merging dorimanx smdk4210 (s2) Kernel. He has already merged most of 3.13, and our s3 kernel is also working for s2, after cm had merged some parts.
Gesendet von meinem SAMSUNG-SGH-I317 mit Tapatalk 2
Click to expand...
Click to collapse
Thank you for that great info DerTeufel, I will see when I can start to merge it and work on it. So it would mean, we could directly start at 3.13. Isn't that great? I will search for his git, and then i will compare our actual kernels with a 3.0 s2 kernel and see what i have to change. Most difficult part will be to get it booting...rest shouldn't be a thing that big. Let's wait and see.
markey97 said:
Thank you for that great info DerTeufel, I will see when I can start to merge it and work on it. So it would mean, we could directly start at 3.13. Isn't that great? I will search for his git, and then i will compare our actual kernels with a 3.0 s2 kernel and see what i have to change. Most difficult part will be to get it booting...rest shouldn't be a thing that big. Let's wait and see.
Click to expand...
Click to collapse
Great idea! Hope it goes well.
Sent from my Nexus 7 (2014) using Tapatalk. My mobile is an Omni run Galaxy S3.
Maybe stupid question, this kernel will be used only on AOSP Roms?, or may run on sammy roms?
niikko said:
Maybe stupid question, this kernel will be used only on AOSP Roms?, or may run on sammy roms?
Click to expand...
Click to collapse
No its no stupid question, just ask if you want to know anything. You're welcome and i am here to answer questions :good:
And now to your question: For now, its meant to run on AOSP ROMs and then afterwards, I will take a deeper look and see if I can get it running good on Sammy, so just wait a bit
And I think I will add features of googy-max kernel, devil-kernel, boeffla-kernel...whatever you want, just write it then when its running fine, and i will try to add it.
I also already thought about adding dual-boot, so yes, you will most likely see Sammy support in this kernel. And afterwards, I will try to make it a kexec kernel and get multiROM or sth like this running, to have e.g. Android and Ubuntu Touch on 1 single device
dat shi cray
samisax said:
dat shi cray
Click to expand...
Click to collapse
What do you want to say with that?
Does this have any sense?
Very nice initiative. Devs in SGS Plus (i9001) also made a fully working 3.4 kernel from the scratch (CAF sources at least ) and now they can release KitKat without pains
Sent from my GT-I9300 using Tapatalk
sanefirst said:
Very nice initiative. Devs in SGS Plus (i9001) also made a fully working 3.4 kernel from the scratch (CAF sources at least ) and now they can release KitKat without pains
Sent from my GT-I9300 using Tapatalk
Click to expand...
Click to collapse
Haha I know, I own this device myself and followed all developement of the 3.4 Kernel and all other work done by ADC team. :good: They used CAF sources but we will use sources from dorimanx cause we have an exynos processor.
Erik is a good dev, isn't he? Thanks to him we also got dual boot and I think we can also get further versions of Android thanks to ADC team.
Well, we will see how good I can get this working in a short time.

[KERNEL] Stock GB kernel for 6.0.B.1.184 with FIXED TETHERING!

Hi everybody. All who currently use (or have been using) Gingerbread on our precious U's
knows that there isn't any custom kernel for GB with working wifi tether. I'm aware
of GingerBeanSS where everything works, but CWM is integrated into ROM, rather than in kernel.
So, after some research I've managed to fix wifi tether in custom kernel
Features of this kernel are the same as one from here:
http://forum.xda-developers.com/showthread.php?t=2064997
which is I believe in turn based on:
http://forum.xda-developers.com/showthread.php?t=1688147
Additions made by me:
-fixed wifi tether;
-Busybox updated to 1.20.2;
-Superuser replaced with SuperSU (latest version, 1.91).
Without any further ado, here are download links,
one for the kernel.elf and one for the flashable zip (CWM):
ELF file:
http://www.mediafire.com/download/b75q4gco8ec5zgd/kernel.elf
CWM zip:
http://www.mediafire.com/download/ms5uahhqyfmle4u/StockGbkernel.zip
I hope you will find this useful
Big thanks to @DooMLoRD for creating this kernel in first place!
Tell me that it is KEXEC enabled… O_O
DaniPhii said:
Tell me that it is KEXEC enabled… O_O
Click to expand...
Click to collapse
I must stress that I'm just low-level "developer". I just tinker until I find the solution
But to my knowledge, I don't believe that this could be done for GB roms
evildev said:
I must stress that I'm just low-level "developer". I just tinker until I find the solution
But to my knowledge, I don't believe that this could be done for GB roms
Click to expand...
Click to collapse
Ouch, that's a pity… Thank you both a lot for this anyway!
DaniPhii said:
Ouch, that's a pity… Thank you both a lot for this anyway!
Click to expand...
Click to collapse
My pleasure
Good job bro ! thanks... I'm still on GB, the best choice IMHO :fingers-crossed:
guitarfreedom said:
Good job bro ! thanks... I'm still on GB, the best choice IMHO :fingers-crossed:
Click to expand...
Click to collapse
I have tried every possible ROM for Xperia U. On every single ROM, there was something that bugged me, but on GB, user experience is unparalleled. Everything is so snappy, fluid, fast... Not a single hitch! All which I have to lose are newer versions of Opera, Chrome and Gmail, but I can live without those. Finally I can use my phone as phone, without call/SMS lags, while still using it as a multimedia device
I have tried every possible ROM for Xperia U. On every single ROM, there was something that bugged me, but on GB, user experience is unparalleled. Everything is so snappy, fluid, fast... Not a single hitch! All which I have to lose are newer versions of Opera, Chrome and Gmail, but I can live without those. Finally I can use my phone as phone, without call/SMS lags, while still using it as a multimedia device
Click to expand...
Click to collapse
I agree with you! I have tried all other roms, but GB is faster in general, in multitasking, in autofocus etc ...and so I came back every time !
I've ever thought that we need a better kernel... And you, maybe, point to this way!
Sent from my ST25i using xda app-developers app
Yayy. Now we can add governors, more frequencies and tweaks : D
Sent from my Xperia U using xda app-developers app
satya-1998 said:
Yayy. Now we can add governors, more frequencies and tweaks : D
Sent from my Xperia U using xda app-developers app
Click to expand...
Click to collapse
Whoa, hold your horses I'm not that crafty and I don't have that much time on my hands (have to study for my exams), but if anyone is willing to add them, please, be my guest
Please upload your kernel source to GitHub, as kernel sources are under GPLv2 license you must share it
Enviado desde mi Xperia U mediante Tapatalk
Garcia98 said:
Please upload your kernel source to GitHub, as kernel sources are under GPLv2 license you must share it
Enviado desde mi Xperia U mediante Tapatalk
Click to expand...
Click to collapse
As stated in the OP, kernel isn't my original work, I just fixed and updated some things by means of tearing apart and putting back together kernels which can be found by following links provided in OP. I know that first version of this kernel was made by DooMLoRD.
Maybe I should put link to Sony's sources, since this is just a stock based kernel with added functionality?
I was afraid that someone would come asking this
P.S.
I am pretty noobish concerning android development, so I don't know my way around GitHub. If anyone is willing, he is free to upload it there
evildev said:
As stated in the OP, kernel isn't my original work, I just fixed and updated some things by means of tearing apart and putting back together kernels which can be found by following links provided in OP. I know that first version of this kernel was made by DooMLoRD.
Maybe I should put link to Sony's sources, since this is just a stock based kernel with added functionality?
I was afraid that someone would come asking this
P.S.
I am pretty noobish concerning android development, so I don't know my way around GitHub. If anyone is willing, he is free to upload it there
Click to expand...
Click to collapse
Uhm, you have compiled this kernel from source, haven't you?
Enviado desde mi Xperia U mediante Tapatalk
Garcia98 said:
Uhm, you have compiled this kernel from source, haven't you?
Enviado desde mi Xperia U mediante Tapatalk
Click to expand...
Click to collapse
I guess is stock 184 zimage with ramdisk edits.
Diego910 said:
I guess is stock 184 zimage with ramdisk edits.
Click to expand...
Click to collapse
exactly.
evildev said:
exactly.
Click to expand...
Click to collapse
Ok, so I think that is not necessary to upload the source.
Sorry for my misunderstood
Enviado desde mi Xperia U mediante Tapatalk
Garcia98 said:
Ok, so I think that is not necessary to upload the source.
Sorry for my misunderstood
Enviado desde mi Xperia U mediante Tapatalk
Click to expand...
Click to collapse
Don't be worried As long as we share, I love this community. I love to have space where everything is shared, and I understand what open source means and I respect that. Like you, I love when everything is properly tagged and credits are given. I love open source
can anyone make a flashable zip?
Sent from my ST25a using xda app-developers app
HollowCrown said:
can anyone make a flashable zip?
Sent from my ST25a using xda app-developers app
Click to expand...
Click to collapse
Look at the OP, links are now updated

Official CM soon? OnePlus releases kernel source.

https://github.com/OnePlusOSS/android_kernel_oneplus_msm8994/tree/oneplus/6.0.1
Legit!
krishna442 said:
https://github.com/OnePlusOSS/android_kernel_oneplus_msm8994/tree/oneplus/6.0.1
Hope this one legit.
Browsing from phone, just wanted to share. Sorry if it ain't legit
Click to expand...
Click to collapse
It is legid, check grarak's tweet.
krishna442 said:
https://github.com/OnePlusOSS/android_kernel_oneplus_msm8994/tree/oneplus/6.0.1
Hope this one legit.
Browsing from phone, just wanted to share. Sorry if it ain't legit
Click to expand...
Click to collapse
Offical cm comes in 4 days.
For the noobs among us. What does this mean? Is the oxygen OS going to be replaced by CM. Will the fingerprint sensor and laser autofocus start working on CM
It means cm started using latest bootloader and official status to get ota, posible improvement in forum, camera, and sound quality (not that was an issue before)
Sent from my ONE A2005 using Tapatalk
izzikiorage said:
For the noobs among us. What does this mean? Is the oxygen OS going to be replaced by CM. Will the fingerprint sensor and laser autofocus start working on CM
Click to expand...
Click to collapse
Finger print senor and laser autofocus has been working for a long time, but there are kernel side improvements in the MM source for at least the finger printer sensor.
This means we are getting official CyanogenMod (starting with nightlies). Nothing to do with OnePlus or OOS, their OTA will come in the next couple of weeks AFAIK.
Additionally, our kernel developers get to have fun fixing OnePluses *presumably* rushed kernel code
Nice, so after a proper flash i can start using the snapshots for CM? (nightlies are a little too unpredictable for me)
And this is CM 13? the marshmallow one
Shibli Aftab:
https://mobile.twitter.com/Grarak/status/738825631266394112
Verstuurd vanaf mijn ONE A2003 met Tapatalk
Looks like it's building already!
http://jenkins.cyanogenmod.com/view/android/job/android/164352/
mclarenvj said:
Looks like it's building already!
http://jenkins.cyanogenmod.com/view/android/job/android/164352/
Click to expand...
Click to collapse
http://download.cyanogenmod.org/
Can someone please explain to me how to go from Grarak's last CM13 Build to these nightly builds?
CJOS100 said:
Can someone please explain to me how to go from Grarak's last CM13 Build to these nightly builds?
Click to expand...
Click to collapse
i downloaded nightly build and dirty flashed it
Regards,
flo071
flo071 said:
i downloaded nightly build and dirty flashed it
Regards,
flo071
Click to expand...
Click to collapse
That definitely worked? Because I wasn't sure after what Grarak said on twitter: http://i.imgur.com/NlWt5qn.png
CJOS100 said:
That definitely worked? Because I wasn't sure after what Grarak said on twitter: http://i.imgur.com/NlWt5qn.png
Click to expand...
Click to collapse
i was on graraks 3rd june build
i flashed the oos3.0.1 firmware and twrp hybrid before that
Regards,
flo071
Sent from my OnePlus2 using XDA Labs

Cyanogenmod

Will this phone ever see official Cyanogenmod roms?
No. Le will never release kernel sources. So you will never have pure CM roms. The CM roms will be based on official ones like 16S, 17S etc.
sanke1 said:
No. Le will never release kernel sources. So you will never have pure CM roms. The CM roms will be based on official ones like 16S, 17S etc.
Click to expand...
Click to collapse
zsajak said:
Will this phone ever see official Cyanogenmod roms?
Click to expand...
Click to collapse
Never say never it's being worked on
deadman96385 said:
Never say never it's being worked on
Click to expand...
Click to collapse
Without the kernel sources?
zsajak said:
Without the kernel sources?
Click to expand...
Click to collapse
With the kernel source
deadman96385 said:
With the kernel source
Click to expand...
Click to collapse
I thought they are not going to release the sources?
zsajak said:
I thought they are not going to release the sources?
Click to expand...
Click to collapse
deadman96385 said:
Click to expand...
Click to collapse
Not sure I understand
deadman96385 said:
With the kernel source
Click to expand...
Click to collapse
I think the kernel sources have been leaked or some enterprising dude has managed to extract the device tree.
sanke1 said:
I think the kernel sources have been leaked or some enterprising dude has managed to extract the device tree.
Click to expand...
Click to collapse
That would be fantastic, lack of cyanogenmod is the only thing that keeps me from buying the device.
deadman96385 said:
Never say never it's being worked on
Click to expand...
Click to collapse
Could you maybe be clearer on this? How likely is it that this is actually going to happen?
I don't know @deadman96385, but i think if a User which such "Experience" in a Community like XDA Developers tells you that the kernel sources may be release, i think you just have to be a Little bit Patient and anytime your dreams will be fulfilled... am i right deadman?
Antisound said:
I don't know @deadman96385, but i think if a User which such "Experience" in a Community like XDA Developers tells you that the kernel sources may be release, i think you just have to be a Little bit Patient and anytime your dreams will be fulfilled... am i right deadman?
Click to expand...
Click to collapse
Correct
Antisound said:
I don't know @deadman96385, but i think if a User which such "Experience" in a Community like XDA Developers tells you that the kernel sources may be release, i think you just have to be a Little bit Patient and anytime your dreams will be fulfilled... am i right deadman?
Click to expand...
Click to collapse
Yes I guess, its just this is the key reason whether I decide to buy this phone or not, dont want to be stuck with chinese roms in the future.
Hi,
Well we already have resurrection remix which is more than decent.
OK... Maybe with a precompiled kernel but still.
I use it as a daily driver and encountered no problems so far except for a slightly too high battery drain.
But a device tree would allow to build other ROMs which would be really cool...
Regards
@deadman96385 it's already in the mid of september.. do you still see any realistic chance that we're gonna see some kernel source or a cyanogenmod in the future. if you do.. of which timeframe do we talk? days, weeks months?
NexusPenguin said:
Hi,
Well we already have resurrection remix which is more than decent.
OK... Maybe with a precompiled kernel but still.
I use it as a daily driver and encountered no problems so far except for a slightly too high battery drain.
But a device tree would allow to build other ROMs which would be really cool...
Regards
Click to expand...
Click to collapse
What are the main disadvantages between precompiled kernel and the use of kernel sources?
Also, I recommend checking htcmania Spain forum, because Parasite_remix is cooking Mooke and CM13 ROMs with 17S firmware.
chemavilla said:
What are the main disadvantages between precompiled kernel and the use of kernel sources?
Also, I recommend checking htcmania Spain forum, because Parasite_remix is cooking Mooke and CM13 ROMs with 17S firmware.
Click to expand...
Click to collapse
Hi,
With the custom kernel, that one can be "optimized" for the device and all missing drivers can be added. At least, that is what I have been told but I'd be glad to be proven wrong.
For the htcmania link : thanks a ton, but I don't think I'll use it.
I sold the x820. Battery drain was really too high and even with moderate use, I could barely get through the day
Finding a replacement was tough, but I am trying the Xiaomi mi5 and Moto X Style (Pure) to see if they can do the job...
Both have flaws the x820 had not. And I honestly must admit that I am missing the x820 already
Regards.
NexusPenguin said:
Hi,
With the custom kernel, that one can be "optimized" for the device and all missing drivers can be added. At least, that is what I have been told but I'd be glad to be proven wrong.
For the htcmania link : thanks a ton, but I don't think I'll use it.
I sold the x820. Battery drain was really too high and even with moderate use, I could barely get through the day
Finding a replacement was tough, but I am trying the Xiaomi mi5 and Moto X Style (Pure) to see if they can do the job...
Both have flaws the x820 had not. And I honestly must admit that I am missing the x820 already
Regards.
Click to expand...
Click to collapse
Pretty bad to hear this.
Sadly though, more and more people are leaving the Le Max2 camp. If only they would release the sources...
Anyhow, good luck with your next device
chemavilla said:
What are the main disadvantages between precompiled kernel and the use of kernel sources?
Also, I recommend checking htcmania Spain forum, because Parasite_remix is cooking Mooke and CM13 ROMs with 17S firmware.
Click to expand...
Click to collapse
There are a few problems with using prebuilt kernels.
1. Upstream changes in Android source code might need related kernel changes, if you don't have the kernel source you can't do this.
2. For the same reason, you may be stuck on old android versions if the kernel isn't compatible with newer versions
3 Vendor may have customized some android frameworks and made related kernel changes. As CM wouldn't have these changed frameworks, some features may not work (although this doesn't appear to be an issue with this phone as the CM builds for it seems to be fully functional)

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