[Q]Should I flash a kernel? - Galaxy Tab 2 Q&A, Help & Troubleshooting

How is it going bro's and my name is Pewdiepie
Ok I am Using Cyanogenmod latest nightly I think on my Tab 2 gt - p3100 .
I want to ask should any kernel
I mean many are saying it will fix the battery drain:laugh:
But is it recommended for advanced users or only Developers
And which kernel you think is the best for battery and compatible with CM11
Please help me:highfive:
Peace and please don't hate

No you didn't have to.
I think,stock cm kernel 3.0.31 pretty much has good battery life.
Upstream kernel changes to 3.0.101 did causes battery drain and tried to resolve by devs.
However 3.0.101 have bigger free ram next 818mb, dhollmen 820mb, however agni kernel has same with stock cm kernel.
All those custom kernel offers some features which stock kernel didn't have.
Slightly different with android-andi kernel which purpose to find kernel battery drain for 3.0.101.

jak978 said:
No you didn't have to.
I think,stock cm kernel 3.0.31 pretty much has good battery life.
Upstream kernel changes to 3.0.101 did causes battery drain and tried to resolve by devs.
However 3.0.101 have bigger free ram next 818mb, dhollmen 820mb, however agni kernel has same with stock cm kernel.
All those custom kernel offers some features which stock kernel didn't have.
Slightly different with android-andi kernel which purpose to find kernel battery drain for 3.0.101.
Click to expand...
Click to collapse
Which one do you prefer?

Stock one

jak978 said:
Stock one
Click to expand...
Click to collapse
I mean the custom kernel

shsagnik said:
I mean the custom kernel
Click to expand...
Click to collapse
next kernel or dhollmen

Related

[Q] Marmite Kernel Vs Devil's Kernel

Flashed my Nexus S with CarbonRom(Unofficial) , Now which Kernel is better and why? and can somebody also gimme the links!
Try them all. Different chips, different reactions to custom kernels (no 2 chips are exactly the same).
Here are the kernels. Download and flash the CM version because that is what works for Carbon.
Marmite: https://docs.google.com/spreadsheet/ccc?key=0AntDDKv-lS6IdEt6NWVkX01vNmpfbEh4MHo4eDRCbXc#gid=0
-Fastest on stock voltages and stock frequency. Overclocking needs increased voltages.
Devil: https://docs.google.com/spreadsheet/ccc?key=0AntDDKv-lS6IdEt6NWVkX01vNmpfbEh4MHo4eDRCbXc#gid=0
-No BLN (Backlight Notification)
Matrix: http://downloadandroidrom.com/file/matr1x/NexusSandNexusS4G/25.0
-Stable when overclocking and stock freq. Needs OC for good 4.2.2 performance.
Air kernel: http://forum.xda-developers.com/showpost.php?p=21935053&postcount=1
-Incredibly feature rich. May make your device fast or laggy - depends on your kernel settings.
The following kernels are AOSP based. So you flash this first: http://forum.xda-developers.com/showthread.php?t=2245651
vta2 kernel: http://www.mediafire.com/?fd2tczcqtguk58f
-Makes your device faster because it's overclocked, but there are bugs. I cannot pin-point the exact bugs i encountered.
Der Kernel: http://goo.gl/QlIoh
-Alpha Build. May or may not be stable.
Between the kernels that I have tried, I really like the devil kernel because it seems to make my Nexus S run a lot better. For overclocking however, I use the AIR kernel.
Multisupermono said:
Between the kernels that I have tried, I really like the devil kernel because it seems to make my Nexus S run a lot better. For overclocking however, I use the AIR kernel.
Click to expand...
Click to collapse
..hmm.. To each their own, but Devil is my favorite to overclock.. but overvolting is necessary for my phone for better stability.. Devil oc's nicely to 1512mhz..
I could only overclock mine to 1400mhz when i used it and it seemed to make my phone somewhat slower. Maybe i should check the Devil kernel out one more time.
Devil is the best for me aswell, to bad it isn´t supported / improved in the last time .. but hopefully DerTeufel will find some time for that in the future !
Which version (date) of devil are you using? I use novoodoo version from 5.3.13
!Lür said:
Devil is the best for me aswell, to bad it isn´t supported / improved in the last time .. but hopefully DerTeufel will find some time for that in the future !
Which version (date) of devil are you using? I use novoodoo version from 5.3.13
Click to expand...
Click to collapse
Same/ with voodoo.. Use devil tools to live oc the kernel to 108% and you'll get the 1512 capability..
Marmite also has MTP support.
Matr1x has it too, but Matr1x for Nexus S isn't developed anymore.
link for devil kernels
ej8989 said:
Try them all. Different chips, different reactions to custom kernels (no 2 chips are exactly the same).
Here are the kernels. Download and flash the CM version because that is what works for Carbon.
Marmite: https://docs.google.com/spreadsheet/ccc?key=0AntDDKv-lS6IdEt6NWVkX01vNmpfbEh4MHo4eDRCbXc#gid=0
-Fastest on stock voltages and stock frequency. Overclocking needs increased voltages.
Devil: https://docs.google.com/spreadsheet/ccc?key=0AntDDKv-lS6IdEt6NWVkX01vNmpfbEh4MHo4eDRCbXc#gid=0
-No BLN (Backlight Notification)
Matrix: http://downloadandroidrom.com/file/matr1x/NexusSandNexusS4G/25.0
-Stable when overclocking and stock freq. Needs OC for good 4.2.2 performance.
Air kernel: http://forum.xda-developers.com/showpost.php?p=21935053&postcount=1
-Incredibly feature rich. May make your device fast or laggy - depends on your kernel settings.
The following kernels are AOSP based. So you flash this first: http://forum.xda-developers.com/showthread.php?t=2245651
vta2 kernel: http://www.mediafire.com/?fd2tczcqtguk58f
-Makes your device faster because it's overclocked, but there are bugs. I cannot pin-point the exact bugs i encountered.
Der Kernel: http://goo.gl/QlIoh
-Alpha Build. May or may not be stable.
Click to expand...
Click to collapse
sir, links for devil kernels
ej8989 said:
Devil: https://docs.google.com/spreadsheet/ccc?key=0AntDDKv-lS6IdEt6NWVkX01vNmpfbEh4MHo4eDRCbXc#gid=0
-No BLN (Backlight Notification)
Click to expand...
Click to collapse
Currently using Devil and BLN actually works fine for me.
To clarify, I am using the 3.0.62 version. No problems at all so far.
I'm running CM10.2 Nightlies, should I change the stock kernel to get better battery life, or should I just stick to it?
Setting.Out said:
..hmm.. To each their own, but Devil is my favorite to overclock.. but overvolting is necessary for my phone for better stability.. Devil oc's nicely to 1512mhz..
Click to expand...
Click to collapse
My phone handles this frequency with devil's kernel and max voltage (1500mV) but it died unexpectedly after 4 months or so.. So you should go a bit down..
ej8989 said:
Try them all. Different chips, different reactions to custom kernels (no 2 chips are exactly the same).
Here are the kernels. Download and flash the CM version because that is what works for Carbon.
Marmite: https://docs.google.com/spreadsheet/ccc?key=0AntDDKv-lS6IdEt6NWVkX01vNmpfbEh4MHo4eDRCbXc#gid=0
-Fastest on stock voltages and stock frequency. Overclocking needs increased voltages.
Devil: https://docs.google.com/spreadsheet/ccc?key=0AntDDKv-lS6IdEt6NWVkX01vNmpfbEh4MHo4eDRCbXc#gid=0
-No BLN (Backlight Notification)
Matrix: http://downloadandroidrom.com/file/matr1x/NexusSandNexusS4G/25.0
-Stable when overclocking and stock freq. Needs OC for good 4.2.2 performance.
Air kernel: http://forum.xda-developers.com/showpost.php?p=21935053&postcount=1
-Incredibly feature rich. May make your device fast or laggy - depends on your kernel settings.
The following kernels are AOSP based. So you flash this first: http://forum.xda-developers.com/showthread.php?t=2245651
vta2 kernel: http://www.mediafire.com/?fd2tczcqtguk58f
-Makes your device faster because it's overclocked, but there are bugs. I cannot pin-point the exact bugs i encountered.
Der Kernel: http://goo.gl/QlIoh
-Alpha Build. May or may not be stable.
Click to expand...
Click to collapse
Hi I am using this rom
Do i have to flash this before i flash any of this kernel?
rakeshbro said:
Hi I am using this rom
Do i have to flash this before i flash any of this kernel?
Click to expand...
Click to collapse
For marmite, devil, matr1x, and air kernels, you don't have to. They have corresponding kernel versions (CM/AOSP) ready for downloading.
Vta2 and Der kernels are AOSP based so you can flash them right away
do not use bigmem kernel on 4.1.2 ..go with 396 - 407mb ram
leap_ahead said:
do not use bigmem kernel on 4.1.2 ..go with 396 - 407mb ram
Click to expand...
Click to collapse
I've flashed matr1x which has bigmem and it's working good on 4.1.2
BTW which kernel is giving more ram 396 - 407mb ??
rakeshbro said:
I've flashed matr1x which has bigmem and it's working good on 4.1.2
BTW which kernel is giving more ram 396 - 407mb ??
Click to expand...
Click to collapse
big mem i mean high mem 412mb r ... that is devil kernel and marmite some of them ..
if u flash marmite big mem kernel not the stantard verisn u will see that video recording Fc

[Q] change from CM11 to FRANCO KERNEL

Hello community,
I am a rookie in the subject of kernels/roms and I would love to have some precious help from any1 that knows even the smallest of information. I recently installed CM kernel and CM nightly 0422. The thing is, I read in many forums (in here as well) that there is a kernel that can boost battery life to its max, Franco Kernel. But I also read that it is somehow incompatible with CM 10+ and causes bootloop if you install it with CM already in phone. What I can't understand is why can't I just simply replace CM kernel (like stock kernel was replaced by CM kernel) by Franco Kernel? What is the fact that I am missing?
ALL (and I mean ALL) help will be highly appreaciated, thanks for your time
T.
f33d_me_plz said:
Hello community,
I am a rookie in the subject of kernels/roms and I would love to have some precious help from any1 that knows even the smallest of information. I recently installed CM kernel and CM nightly 0422. The thing is, I read in many forums (in here as well) that there is a kernel that can boost battery life to its max, Franco Kernel. But I also read that it is somehow incompatible with CM 10+ and causes bootloop if you install it with CM already in phone. What I can't understand is why can't I just simply replace CM kernel (like stock kernel was replaced by CM kernel) by Franco Kernel? What is the fact that I am missing?
ALL (and I mean ALL) help will be highly appreaciated, thanks for your time
T.
Click to expand...
Click to collapse
first off.. there is no magic pill to give your phone for battery life. battery life mostly depends on your personal usage, your personal setup, your apps used, and most importantly the quality of your phone/data connection. everything else is minor for battery life, including kernels.
cm uses CAF as its base now, they went away from aosp(like most kernels here). so everything that is aosp based is not compatible with cm anymore. franco kernel is aosp based(most kernels are). there are a few kernels that are CAF based built just for cm and cm based roms.
simms22 said:
first off.. there is no magic pill to give your phone for battery life. battery life mostly depends on your personal usage, your personal setup, your apps used, and most importantly the quality of your phone/data connection. everything else is minor for battery life, including kernels.
cm uses CAF as its base now, they went away from aosp(like most kernels here). so everything that is aosp based is not compatible with cm anymore. franco kernel is aosp based(most kernels are). there are a few kernels that are CAF based built just for cm and cm based roms.
Click to expand...
Click to collapse
Thanks for your time and your answer
First of all, I know for myself that there is no magic pill about battery life, I just read in too many threads that FK added a good portion of battery life (with same use of phone like when it had CM) ! Moreover it allows you to overclock (my) Nexus5 beyond 2.2GHz, something that CM doesn't allow you too (I know that overclocking kills battery, I just want to test something). What I don't understand is how can FK mess up with CM when both are different kernels and by installing FK over CM means that FK replaces CM. There is no CM in the end, only FK. Or not...? What have I understood wrong?
Thanks again
f33d_me_plz said:
Thanks for your time and your answer
First of all, I know for myself that there is no magic pill about battery life, I just read in too many threads that FK added a good portion of battery life (with same use of phone like when it had CM) ! Moreover it allows you to overclock (my) Nexus5 beyond 2.2GHz, something that CM doesn't allow you too (I know that overclocking kills battery, I just want to test something). What I don't understand is how can FK mess up with CM when both are different kernels and by installing FK over CM means that FK replaces CM. There is no CM in the end, only FK. Or not...? What have I understood wrong?
Thanks again
Click to expand...
Click to collapse
yes, franco would replace cm kernel if all worked right. but what you are doing is replacing cm kernel with franco kernel, but cm rom stays on your phone. franco kernel is incompatible with cm rom. since franco is aosp and cm is caf, your phone would never boot up all the way.
simms22 said:
yes, franco would replace cm kernel if all worked right. but what you are doing is replacing cm kernel with franco kernel, but cm rom stays on your phone. franco kernel is incompatible with cm rom. since franco is aosp and cm is caf, your phone would never boot up all the way.
Click to expand...
Click to collapse
So, if I am getting your point right, since one is aosp and the other is caf THAT is the reason why CM doesn't uninstall and will exist together with franco? Is there a way to permanently delete CM in order to install franco? Maybe to go back to stock kernel then install FK?
f33d_me_plz said:
So, if I am getting your point right, since one is aosp and the other is caf THAT is the reason why CM doesn't uninstall and will exist together with franco? Is there a way to permanently delete CM in order to install franco? Maybe to go back to stock kernel then install FK?
Click to expand...
Click to collapse
its not about the kernel, its about the rom. they are different things. when you flash a kernel(any), it replaces the kernel thats on your phone(kernels come with roms, cm kernel with cm rom). cm rom includes cm kernel, both are built from caf source. franco kernel is aosp, it is not compatible with cm rom. it has nothing to do with cm kernel, it replaces cm kernel when flashed. but you will never boot up your phone because it isnt compatible with cm rom.
simms22 said:
its not about the kernel, its about the rom. they are different things. when you flash a kernel(any), it replaces the kernel thats on your phone(kernels come with roms, cm kernel with cm rom). cm rom includes cm kernel, both are built from caf source. franco kernel is aosp, it is not compatible with cm rom. it has nothing to do with cm kernel, it replaces cm kernel when flashed. but you will never boot up your phone because it isnt compatible with cm rom.
Click to expand...
Click to collapse
ok, finally I got it, thanks to you Last question... is there a way to get FK now or am I just locked to caf due to CM "for life"? which way (if there is any at all) in your opinion is the best way to go from CM to FK? maybe go back to stock rom/kernel then flash FK? Will this work?
f33d_me_plz said:
ok, finally I got it, thanks to you Last question... is there a way to get FK now or am I just locked to caf due to CM "for life"? which way (if there is any at all) in your opinion is the best way to go from CM to FK? maybe go back to stock rom/kernel then flash FK? Will this work?
Click to expand...
Click to collapse
no, they arent compatible at all. you can not use franco kernel with any cm based roms. you can change roms and use franco kernel with it, any aosp rom or even the stock rom. but cm isnt compatible at all with franko kernel.
simms22 said:
no, they arent compatible at all. you can not use franco kernel with any cm based roms. you can change roms and use franco kernel with it, any aosp rom or even the stock rom. but cm isnt compatible at all with franko kernel.
Click to expand...
Click to collapse
Thanks man !!
f33d_me_plz said:
Thanks man !!
Click to expand...
Click to collapse
If your looking for a good CAF kernel to run with a PAC or CM based ROM. I'd recommend the ElementalX CAF kernel. It's very stable, rich features, great performance and great battery life. Make sure to read the OP for directions and if you decide to try it out download the ElementalX R38 version with the aromma installer (not the express version) As with running any new kernel run it for a few days minimum to allow for it by on settle in.
There is another option for you to explore too - http://forum.xda-developers.com/google-nexus-5/development/cm11-users-heres-how-aospnon-caf-t2626961
This allows you to run a script that will basically De-CAF your rom and allow you to run a AOSP kernel on CM11ROMs.. Be sure to read the OP. It works with many CM11 and CM based ROMs, but not on all the newest versions. Definitely worth checking out.
xdrc45 said:
If your looking for a good CAF kernel to run with a PAC or CM based ROM. I'd recommend the ElementalX CAF kernel. It's very stable, rich features, great performance and great battery life. Make sure to read the OP for directions and if you decide to try it out download the ElementalX R38 version with the aromma installer (not the express version) As with running any new kernel run it for a few days minimum to allow for it by on settle in.
There is another option for you to explore too - http://forum.xda-developers.com/google-nexus-5/development/cm11-users-heres-how-aospnon-caf-t2626961
This allows you to run a script that will basically De-CAF your rom and allow you to run a AOSP kernel on CM11ROMs.. Be sure to read the OP. It works with many CM11 and CM based ROMs, but not on all the newest versions. Definitely worth checking out.
Click to expand...
Click to collapse
Thanks for your interest and time! I will sure check both your ROM and the De-CAF script soon and post my opinion/experience ! For newbies like me that are reading this post, here is a quite enbrightening thread about CAF and qualcomm processors (although it's Reddit, it's quite explanatory).
Peace!
T.
f33d_me_plz said:
Thanks for your interest and time! I will sure check both your ROM and the De-CAF script soon and post my opinion/experience ! For newbies like me that are reading this post, here is a quite enbrightening thread about CAF and qualcomm processors (although it's Reddit, it's quite explanatory).
Peace!
T.
Click to expand...
Click to collapse
Sorry, I forgot to paste the link cheers ! http://www.reddit.com/r/Android/comments/1rt9md/eli5_what_is_caf_why_is_cm_going_caf_affects_the/

Best kernel to use with Stock 12S?

Stock kernel is very bad on battery & the phone is over heating a lot.
rajarshi10 said:
Stock kernel is very bad on battery & the phone is over heating a lot.
Click to expand...
Click to collapse
Franco
AK
Boeffla
Any of the above
I suggest Franco
There's no such thing as the best kernel. The best kernel is the one that you decide suits you and your setup after testing them yourself.

Which kernel to use [Bacon - Aosp - Caf] - Marshmallow

when i was using lollipop i always went with ak kernel but since ak kernel stopped supporting oneplus one when marshmallow roms began to come i became a bit confused as to which kernel i should use.
so i did a bit of searching with kernels that existed. and the kernels i found that i could use was
1. Sultan
2. Tyr Kernel
3. Andy Kernel
4. Radioactive Kernel
so i was wondering what kernel is the best alternative to ak kernel and if so does that kernel have any problems which makes so i should avoid it?
p.s im open to discussions and even having an idea of what i should do will probly help more then it hurts
calionte said:
when i was using lollipop i always went with ak kernel but since ak kernel stopped supporting oneplus one when marshmallow roms began to come i became a bit confused as to which kernel i should use.
so i did a bit of searching with kernels that existed. and the kernels i found that i could use was
1. Sultan
2. Tyr Kernel
3. Andy Kernel
4. Radioactive Kernel
so i was wondering what kernel is the best alternative to ak kernel and if so does that kernel have any problems which makes so i should avoid it?
p.s im open to discussions and even having an idea of what i should do will probly help more then it hurts
Click to expand...
Click to collapse
It's pretty simple actually CAF kernels usually stated in the title of the kernel thread work on CAF ROMs e.g. Sultan, and any ROM that states CAF in its title works with these kernels.
CM kernel such as Lightning, Boeffla and Andy all state specifically CM12/13 in the thread title and those work with stock CM and ROMs derived from CM source and kernel trees.
Finally Omni based kernels only one works properly (Donkey Kernel) also states Omni in the thread title.
The common denominator is that they all clearly state in the thread title what they are for so there's nothing to discuss on which ones to be used for which ROM. In regards to quality that's a bit trickier as we all like different things in a kernel and personally I'm a big fan of Boeffla when I'm on CM13 cause it works great and the app is very intuitive. I've also tried Andy kernel and its got a good mix of features. I'm on Omni 5.1.1 nightlies so I'm on the stock kernel but when I move back to Marshmallow I can update on kernels
Sent from my A0001 using Tapatalk
Renosh said:
It's pretty simple actually CAF kernels usually stated in the title of the kernel thread work on CAF ROMs e.g. Sultan, and any ROM that states CAF in its title works with these kernels.
CM kernel such as Lightning, Boeffla and Andy all state specifically CM12/13 in the thread title and those work with stock CM and ROMs derived from CM source and kernel trees.
Finally Omni based kernels only one works properly (Donkey Kernel) also states Omni in the thread title.
The common denominator is that they all clearly state in the thread title what they are for so there's nothing to discuss on which ones to be used for which ROM. In regards to quality that's a bit trickier as we all like different things in a kernel and personally I'm a big fan of Boeffla when I'm on CM13 cause it works great and the app is very intuitive. I've also tried Andy kernel and its got a good mix of features. I'm on Omni 5.1.1 nightlies so I'm on the stock kernel but when I move back to Marshmallow I can update on kernels
Sent from my A0001 using Tapatalk
Click to expand...
Click to collapse
which kernels works with which rom i already knew but i still respect the answer i got. well the main concern i had was about the quality of the roms and which roms is good for what.
It depends on what you want. For example some devs here around merge a bunch of patches to improve sth. Sometimes i dont know what they are doing. I also started with that but soon i have learned less is more. Than there are kernels with gazillion oft features to choose. Thousond hotplugs and governors etc. Than there are small and simple kernels without such experimental features close to stock. I for example dont want to tune 5 days to improve me results i like it simple. So you have 3 or more different types to choose.
1. experimental maybe unstable kernels with lots of patches
2. kernels with lots of features
3. small and simple and more stable kernel close to stock
There is no best or better kernel. Choose the one you like best.
Its your choice.
You also missed the CAF lightning Kernel built off of AK's caf kernel. It's the best kernel for CAF right now IMO. It's basically all of AK kernel's great features just updated to support CAF marshmallow and bug fixes/ latest commits. Works with synapse and all of the original AK CAF kernel profiles.

Kernel for Exodus

Which kernels is there for Exodus? It's AOSP but it doesnt have sultans caf kernel so I'm not sure which to look for? cm13 or caf? or is there none that work?
Stock
the_rooter said:
Stock
Click to expand...
Click to collapse
......I wouldnt ask if I wanted stock. Phone gets too hot with normal use and there isn't many tweaks I can make to make it cooler.
The kernel is cm based.
Btw. there is no aosp kernel for the oneplus one. We have 4 different types. Based on CM; based on Sultans CAF kernel; based on omnirom; based on Color OS.
Sent from my A0001 using XDA-Developers mobile app
idonttakedrugs said:
Which kernels is there for Exodus? It's AOSP but it doesnt have sultans caf kernel so I'm not sure which to look for? cm13 or caf? or is there none that work?
Click to expand...
Click to collapse
Lightning Kernel v22 (updated to 23 now) and Lightning kernel based on Linux kernel v3 works for me with exodus. Personally prefer the latter. Boeffla didnt boot for me with exodus and i didnt try any caf kernels.
If you have heating issues you may want to try the 6th June build if you arent using it already
Heat issue does exist in build may 23 - june 1.. Even if you change the kernel.
Check your current build.. Update to the latest one
onitsuka. said:
Heat issue does exist in build may 23 - june 1.. Even if you change the kernel.
Check your current build.. Update to the latest one
Click to expand...
Click to collapse
Thankyou, I'm on the may the 1st build. I'll try the newest! What was causing the heat? My phone was reaching 60-70c!!!
Aniket.t20 said:
Lightning Kernel v22 (updated to 23 now) and Lightning kernel based on Linux kernel v3 works for me with exodus. Personally prefer the latter. Boeffla didnt boot for me with exodus and i didnt try any caf kernels.
If you have heating issues you may want to try the 6th June build if you arent using it already
Click to expand...
Click to collapse
Yeah I'll try the lastest, I'll also try Lightning Kernel. Thanks!!
DerRomtester said:
The kernel is cm based.
Btw. there is no aosp kernel for the oneplus one. We have 4 different types. Based on CM; based on Sultans CAF kernel; based on omnirom; based on Color OS.
Sent from my A0001 using XDA-Developers mobile app
Click to expand...
Click to collapse
Thanks for that bro, cleared things up :good:

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