Database Users

[Q] Does a custom Rom come with a Kernel?

Does a custom Rom come with a Kernel?
My specific case :
Nexus 7 32Gb Wifi
Android 4.1.2
Rom : PA 2.54
Kernel : Franco 3.1.10
My plan is to update to PA 2.99Beta6 which is based on Android 4.2.
I'd like to know if I'll also need to flash a new kernel as part of the upgrade process or if the PA 2.99Rom also includes the required kernel.
My guess is that it will be included with the Rom but figured it wouldn't do any harm to ask.

PMSL, how on earth do you think a ROM would actually work otherwise without a kernel.
Sorry but.... #facepalm
Sent from my Nexus 7 using xda app-developers app

My fear was that a Rom might use or expect the stock kernel, cheers for the answer though.
With that in mind, I wonder why Roms don't tend to ship with custom kernels. Franco's seems to be widely preferred to stock.

Mr_Loon said:
My fear was that a Rom might use or expect the stock kernel, cheers for the answer though.
With that in mind, I wonder why Roms don't tend to ship with custom kernels. Franco's seems to be widely preferred to stock.
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most roms that are actually developed ship with custom kernels(like cm for example). roms that are just compiled from aosp source that have some mods added usually use the default android kernel(or stock roms with added mods). also, many roms ship with other custom kernels included. anyways, many others prefer trinity kernel

Mr_Loon said:
My fear was that a Rom might use or expect the stock kernel, cheers for the answer though.
With that in mind, I wonder why Roms don't tend to ship with custom kernels. Franco's seems to be widely preferred to stock.
Click to expand...
Click to collapse
Sorry I may have picked up on your question wrong, but many developers, well in fact most would use custom kernels, some prefer stock, stock kernels are generally very stable but quite limited in what they can do, for example take the pretty amazing Siyah on Galaxy S3 which gives you the ability to dual boot different ROM, s, i had AOSP as my main ROM and a Samsung ROM as my secondary ROM which was great for a while but they novelty wore off for me as I really only used the AOSP ROM, not to mention over clocking , etc, etc, etc.
I use Trinity Seven kernel on the Nexus and i find that the tablet seems to charge faster than with the CM kernel that comes with Liquid Smooth ROM.
Hope that answers some of your questions anyway
Sent from my Nexus 7 using xda app-developers app

Help! problem with Trinity kernel

My nexus 7 is rebooting after a while using trinity kernel. I'm in stock 4.2.1 and I had random reboots even when no it applying any kind of OC just the kernel's default settings! What can I do to prevent that from happening?

Flash a different kernel.
Not all tablets are created equal. Whereas one will play nice with a particular kernel, the very next one off the assembly line may not.

najaboy said:
Flash a different kernel.
Not all tablets are created equal. Whereas one will play nice with a particular kernel, the very next one off the assembly line may not.
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I flashed motley kernel without any oc and I still get random reboots. Should I go back to stock kernel?

jeff.murillo said:
I flashed motley kernel without any oc and I still get random reboots. Should I go back to stock kernel?
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i bet its an app causing it.

Don't know why I initially glanced over you being on 4.2.1. Random reboots are actually a known issue with 4.2.x due to a problem at the OS level. Essentially, anything that uses geolocation can inadvertently trigger a reboot. Apps such as HD Widgets have updated to use a workaround until Google themselves fixes the issue. In the meantime, the only certain way to avoid the reboots is to turn off location services or downgrade to 4.1.2.
Unfortunately, this bug isn't consistently reproducible, but it does affect the entire Nexus line of devices using 4.2 and 4.2.1.

najaboy said:
Don't know why I initially glanced over you being on 4.2.1. Random reboots are actually a known issue with 4.2.x due to a problem at the OS level. Essentially, anything that uses geolocation can inadvertently trigger a reboot. Apps such as HD Widgets have updated to use a workaround until Google themselves fixes the issue. In the meantime, the only certain way to avoid the reboots is to turn off location services or downgrade to 4.1.2.
Unfortunately, this bug isn't consistently reproducible, but it does affect the entire Nexus line of devices using 4.2 and 4.2.1.
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Thanks buddy, with motley kernel I've just had 1 reboot. I'm going to test turning location services off and see what happens. BTW any idea how to oc the GPU in motley kernel? in trickster mod there's no option for it.

jeff.murillo said:
Thanks buddy, with motley kernel I've just had 1 reboot. I'm going to test turning location services off and see what happens. BTW any idea how to oc the GPU in motley kernel? in trickster mod there's no option for it.
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is ocing the gpu enabled in motley kernel? it has to be a feature of the kernel to be able to do it, an app cant do it if the kernel doesnt include the mod.

simms22 said:
is ocing the gpu enabled in motley kernel? it has to be a feature of the kernel to be able to do it, an app cant do it if the kernel doesnt include the mod.
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According to the kernels features, it supports GPU oc

jeff.murillo said:
According to the kernels features, it supports GPU oc
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the kernel might use a different method than the one the app "knows". for an example, cm color control with trinity kernel on the gnex. both cm and trinity have color control enabled, but since cm uses a different method of color control, you cant use the native cm rom color control option with trinity kernel, nor can you use the trinity kernel toolbox to control color on a cm rom/kernel. as they say, theres more than one way to skin a cat.

simms22 said:
the kernel might use a different method than the one the app "knows". for an example, cm color control with trinity kernel on the gnex. both cm and trinity have color control enabled, but since cm uses a different method of color control, you cant use the native cm rom color control option with trinity kernel, nor can you use the trinity kernel toolbox to control color on a cm rom/kernel. as they say, theres more than one way to skin a cat.
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That's what I thought, any idea how to do it in motley kernel?

jeff.murillo said:
That's what I thought, any idea how to do it in motley kernel?
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Click to collapse
honestly i dont, id assume that motley used francos method since thats the most popular way. you should probably ask in the motley thread. but for some reason, i dont think it does, not the 4.2.1 kernel at least. maybe he just didnt update his op to reflext this. ask in the thread anyways

[Req] CM kernel with UV

Hi there,
Im searching for the CM kernel with the ability to undervolt as a kind of add in it?
Is such a kernel available? Can anyone build such a kernel?
Thx

Cm is just stock kernel. Faux made an enhanced stock kernel with undervolt and gamma control http://faux.androidro.ms/mako/mako-jb-enhanced_stock_422_r2.zip

AW: [Req] CM kernel with UV
Michealtbh said:
Cm is just stock kernel. Faux made an enhanced stock kernel with undervolt and gamma control http://faux.androidro.ms/mako/mako-jb-enhanced_stock_422_r2.zip
Click to expand...
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THX, can you also please point me to the thread. Searching via app is a pain.

thebrainkafka said:
THX, can you also please point me to the thread. Searching via app is a pain.
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Hi,
Here: Faux kernel

AW: [Req] CM kernel with UV
viking37 said:
Hi,
Here: Faux kernel
Click to expand...
Click to collapse
Can you recommend this kernel?

thebrainkafka said:
Can you recommend this kernel?
Click to expand...
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Re,
Yes, maybe, there is a lot of good feedback
But I don't use it so I can't really comment, I just read the thread. You have, like said above an enhanced stock kernel with undervolt and 2 other features, nothing more. And you have the custom kernel with overclock CPU / GPU, you can change vibration, I/O scheduler, TCP congestion, etc...
Read the OP for more informations and give it a try

Michealtbh said:
Cm is just stock kernel. Faux made an enhanced stock kernel with undervolt and gamma control http://faux.androidro.ms/mako/mako-jb-enhanced_stock_422_r2.zip
Click to expand...
Click to collapse
cm kernel is not stock kernel. its a highly modified kernel.

AW: [Req] CM kernel with UV
simms22 said:
cm kernel is not stock kernel. its a highly modified kernel.
Click to expand...
Click to collapse
Is there a simple uv addon for cm kernel. Dont need other stuff...

thebrainkafka said:
Is there a simple uv addon for cm kernel. Dont need other stuff...
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i dont think they built in the ability to adjust voltage. but, since its open source, anyone can build tbe kernel from cm source and add the ability to change voltages.

simms22 said:
cm kernel is not stock kernel. its a highly modified kernel.
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Click to collapse
Incorrect. CM barely touches the kernel as is, but the MAKO developer (his name escapes me) is even more conservative than that. It is nearly stock.

EvoXOhio said:
Incorrect. CM barely touches the kernel as is, but the MAKO developer (his name escapes me) is even more conservative than that. It is nearly stock.
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give it time
cm kernels come with everything there is and are often highly modified by the end of a device's life cycle
if this dev is conservative, ok, then it might take longer or until some new kid takes over.
just don't say cm barely touches kernels
Sent from my GT-N7105 using Tapatalk 2

AW: [Req] CM kernel with UV
morfic said:
give it time
cm kernels come with everything there is and are often highly modified by the end of a device's life cycle
if this dev is conservative, ok, then it might take longer or until some new kid takes over.
just don't say cm barely touches kernels
Sent from my GT-N7105 using Tapatalk 2
Click to expand...
Click to collapse
Can anyone oft you build a cm kernel with uv?

thebrainkafka said:
Can anyone oft you build a cm kernel with uv?
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Click to collapse
there are many other kernels, better than cm kernel, that offer the ability to adjust voltages. theres trinity kernel, franco kernel, faux..

AW: [Req] CM kernel with UV
simms22 said:
there are many other kernels, better than cm kernel, that offer the ability to adjust voltages. theres trinity kernel, franco kernel, faux..
Click to expand...
Click to collapse
Yes, but the are all overbloated... No slim and simple one.

thebrainkafka said:
Yes, but the are all overbloated... No slim and simple one.
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Click to collapse
Wrong! Try Harsh. It's flash it and leave it. Very good kernel. Highly recommended. Supports UV and uses mpdecision.

thebrainkafka said:
Yes, but the are all overbloated... No slim and simple one.
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Click to collapse
both trinity and franco kernels are also cleaned up so theres no bloating. trinity is one of the least bloated kernels as it doesnt include any of the normal "buzzword" additions, only what is needed, highly optimized, debugging removed, "bull**** free" as it states in its op.

Odp: [Req] CM kernel with UV
Faux got enhanced stock kernel not moded alot. Just some unlocks and fixes. Maybe try this one. Im already on enhanced and its stable plus you got gamma unlocked.
Sent from my Nexus 4 using xda app-developers app

What Kernel is more like the stock?
Faux or Franco?
Thanks.

ergalle2 said:
What Kernel is more like the stock?
Faux or Franco?
Thanks.
Click to expand...
Click to collapse
Both are so far from stock it's not worth answering. Try Harsh kernel.

AW: [Req] CM kernel with UV
estallings15 said:
Both are so far from stock it's not worth answering. Try Harsh kernel.
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Click to collapse
Can you please point me to harsh. Searching in xda APP is a pain.

[Q] %95 of kernels break my camera.

It seems on pretty much any rom with a custom kernel breaks my camera. When I focus it goes all screwy and crashes. Changing the GPU govenor dosent help. Any ideas how to stop this? Even on JWR with a JWR kernel it happens. Im stuck using stock 4.2.2 with stock kernel because it kills my camera.

bandit97 said:
It seems on pretty much any rom with a custom kernel breaks my camera. When I focus it goes all screwy and crashes. Changing the GPU govenor dosent help. Any ideas how to stop this? Even on JWR with a JWR kernel it happens. Im stuck using stock 4.2.2 with stock kernel because it kills my camera.
Click to expand...
Click to collapse
wait wait! are you using JWR or JSS on a 4.2.2 rom?
update to 4.3 and when you get it now flash a kernel JWR if you are in stock rom if not and you are using Carbon rom, Rasbeanjelly,Cyanogenmod use JSS (JLS now) if you are on Paranoid , PSX , Purity flash JWR kernel then.
this should be fix your problem on camera!

alvin182 said:
wait wait! are you using JWR or JSS on a 4.2.2 rom?
update to 4.3 and when you get it now flash a kernel JWR if you are in stock rom if not and you are using Carbon rom, Rasbeanjelly,Cyanogenmod use JSS (JLS now) if you are on Paranoid , PSX , Purity flash JWR kernel then.
this should be fix your problem on camera!
Click to expand...
Click to collapse
Lol. I know. I was just saying even if I use a kernel written for specifically JWR on JWR it still bug's. Basically any kernel with any rom other than stock breaks my camera. Im aware about the different kernel and rom types.

bandit97 said:
Lol. I know. I was just saying even if I use a kernel written for specifically JWR on JWR it still bug's. Basically any kernel with any rom other than stock breaks my camera. Im aware about the different kernel and rom types.
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sorry man i understood you were on a 4.2.2 rom sorry.
have you ever made a full flash factory image? maybe you need reset all via userdata .
just try sometimes i do this!

[Q] CM11 Kernel situation

Are they still going the CAF route? Or is that ending since it mainly had to do with freezes (if I recall) in 4.3?
It's going to affect my decision to go back to 10.1. I really want to have touch2wake on my kernel and these fixes to make faux and franco kernels function are starting to cause issues on 10.2.
AFAIK, these developers will not be supporting CAF =/

Elegant996 said:
Are they still going the CAF route? Or is that ending since it mainly had to do with freezes (if I recall) in 4.3?
It's going to affect my decision to go back to 10.1. I really want to have touch2wake on my kernel and these fixes to make faux and franco kernels function are starting to cause issues on 10.2.
AFAIK, these developers will not be supporting CAF =/
Click to expand...
Click to collapse
freezes on 4.3 was due to bug in aosp jss code, witch have been fixed in 4.3.1. so update to lastest cm.
and in 4.4 they will continue.

Yeah, I'm running the stable release of 10.2 with ziddley's franco kernel and it's causing issues here and there now. I was hoping they were going to revert back to AOSP. I guess I'll revert back to 10.1 to maintain my desired functionality for now.

Elegant996 said:
Yeah, I'm running the stable release of 10.2 with ziddley's franco kernel and it's causing issues here and there now. I was hoping they were going to revert back to AOSP. I guess I'll revert back to 10.1 to maintain my desired functionality for now.
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ahh u using custom kernel, not cm one.no issue while i was on cm 10.2 with my modified build of franco.kernel

opssemnik said:
ahh u using custom kernel, not cm one.no issue while i was on cm 10.2 with my modified build of franco.kernel
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Yeah, unless there's some way to get touch2wake working on 10.2; I heard you have gamma settings now with the caf kernel included so I figure I can maintain my color scheme.

Elegant996 said:
Yeah, unless there's some way to get touch2wake working on 10.2; I heard you have gamma settings now with the caf kernel included so I figure I can maintain my color scheme.
Click to expand...
Click to collapse
try with other kernels.

On CM11 and Cm10.2 try these: 1) Modified franco and faux to work on Cm : http://forum.xda-developers.com/showthread.php?t=2487246
2) AK has CM exclusive kernel : http://forum.xda-developers.com/showthread.php?t=2473454

opssemnik said:
ahh u using custom kernel, not cm one.no issue while i was on cm 10.2 with my modified build of franco.kernel
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You can always follow a tutorial to build your own cm from source code and enable module support. In that way you won't be using custom kernels, everything will be cm 100%.
I am using touchcontrol in that way, and I'm quite happy with the results.
Sent from my Nexus 4 using xda app-developers app

CM11 is great with hells-core. Touch control works, and battery/performance is amazing.

korockinout13 said:
CM11 is great with hells-core. Touch control works, and battery/performance is amazing.
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I have been trying to find a link for 15 minutes!
Could you provide me with a link?
Thanks!

myweca said:
I have been trying to find a link for 15 minutes!
Could you provide me with a link?
Thanks!
Click to expand...
Click to collapse
Right in the general section: http://forum.xda-developers.com/showthread.php?t=2495373