If I was to install, say, the Liquid Smooth ROM onto my i717 (I have a good amount of experience with flashing ROMs, so that much I know,) specifically, the KitKat version, it lists kernels in the download links. Would these kernels be included with the ROM files themselves, i.e. install at the same time as the ROM, or would I have to flash the kernel separately before flashing the ROM? Thank you VERY much in advance
Reinstalled said:
If I was to install, say, the Liquid Smooth ROM onto my i717 (I have a good amount of experience with flashing ROMs, so that much I know,) specifically, the KitKat version, it lists kernels in the download links. Would these kernels be included with the ROM files themselves, i.e. install at the same time as the ROM, or would I have to flash the kernel separately before flashing the ROM? Thank you VERY much in advance
Click to expand...
Click to collapse
The thread should tell you if the kernel is baked into the Rom our not but the stock kernel usually comes with it. I'm pretty sure you're talking about a beefed up kernel tho. You'll just have to read the thread and if you're still not clear about it, ask in that thread to be sure.
Sent from my HTC0P3P7 using Tapatalk
Reinstalled said:
If I was to install, say, the Liquid Smooth ROM onto my i717 (I have a good amount of experience with flashing ROMs, so that much I know,) specifically, the KitKat version, it lists kernels in the download links. Would these kernels be included with the ROM files themselves, i.e. install at the same time as the ROM, or would I have to flash the kernel separately before flashing the ROM? Thank you VERY much in advance
Click to expand...
Click to collapse
there is always a kernel included with a rom. most alternate kernels are made and or flashed to combat a side effect or incompatibility with some folks devices. its not that provided kernel doesn't work, just that every device is different and the alternates can sometimes be more compatible.
however, I would suggest you give the original kernel a chance to settle, at least a day if not two. if it just flat out is not working for you, then flash an alternate onto the rom. wipe you caches ( not factory) flash kernel by itself and your good
never want to discount reading here as Gimmeitorilltell suggests. reading educates you and puts you in a better position to help yourself first.
Reinstalled said:
If I was to install, say, the Liquid Smooth ROM onto my i717 (I have a good amount of experience with flashing ROMs, so that much I know,) specifically, the KitKat version, it lists kernels in the download links. Would these kernels be included with the ROM files themselves, i.e. install at the same time as the ROM, or would I have to flash the kernel separately before flashing the ROM? Thank you VERY much in advance
Click to expand...
Click to collapse
In general stick with the kernel that comes with a ROM unless you have a reason to change, like stability, overclocking, etc... but you do flash the kernel after the ROM; anytime after the ROM flash really. You don't need a clean flash before kernel switch.
The dev probably did not test his/her ROM with every kernel possible so if you want support your best bet is to be on the kernel included. For the 1st install of a ROM if you are unsure you should definitely use included kernel; as sometimes you just can't predict what changing it will do.
That said there many of us do switch kernels when installing updates, I certainly do. There are not alot of kernels for our phones as only a dedicated few devs continue to support the Note but you have a few choices. All kernels I've seen allow performance/governor control to some degree. If you read through the various ROM threads you'll find that some kernels are preferred by users but for the most part kernels like Uber work well with most ROMs.
P0llution's ROM patch allows you to switch kernels after flashing a ROM (BeanStalk, LiquidSmooth, etc....) and even before 1st boot. It also has patches for various KK problems. It is in the Beanstalk thread 1st post.
Thank you so much for your replies! Installed LS and flashed Uber kernel and running with no issues.
Sent from my SAMSUNG-SGH-I717 using Tapatalk
Related
Hey anyone that's got some noob time, I was curious what exactly is a kernel, why are there different kernels, when to know if you need to use a different kernel and lastly instructions on how to flash a kernel. I am pretty experienced in dealing with my phone and I'm capable of bringing my phone back from ANY software brick with ODIN and I have been flashing ROMS for about 5 months. I recently was reading up on the Epic 4g forums because I was going to root my epic when I buy it and I noticed much more about kernels in the epic 4g forums. Any knowledge would be appreciated! Thanks!
Roms, Basebands and Kernels, a basic overview
The baseband is only the 'radio' part of the phone that makes the calls, the 3G and Wifi connections, GPS connections, etc. As you thought, it is totally separate from a ROM. Updating a ROM will not update a baseband and going back to an older ROM will not 'downgrade' the baseband either. Upgrades to a baseband my improve signal strength, call quality, maybe have software tweaks to improve battery life while on 3G/Wifi, etc - things like that.
Kernels are the core software code that allows CPU to over-clocking and controls voltage controls. Think of it like Bios settings on your computer (PC, that is)..that's really all they do. Now, a kernel can be completely separate from a ROM, but a new ROM contains a kernel in it so it will run. So, a kernel can be both separately applied from a ROM, but is also part of a ROM.
The ROM is basically everything else but the apps and the two things above. It's actually the OS, as well as any stock apps that come with it - and any new improvements, features, etc. The increasing build numbers reflect bug fixes, known issue solutions, feature improvements, etc...thing of them like windows service packs and/or any software update.
Some of the other phones modifying the kernel may be done more because the phone design and limitations
Hope that helps
Very helpful, I was sure to click thanks. I'm curious how to change the kernel on my phone and when should i consider changing it. Do I use ODIN to change the kernel? Also can any kernel work with any ROM? If not, how do I know which ROMs a specific kernel is compatible with?
stevenmcneal83 said:
Very helpful, I was sure to click thanks. I'm curious how to change the kernel on my phone and when should i consider changing it. Do I use ODIN to change the kernel? Also can any kernel work with any ROM? If not, how do I know which ROMs a specific kernel is compatible with?
Click to expand...
Click to collapse
Most kernels can be flashed just like a ROM, very few require ODIN and if it does the dev will specifically say so. Also not every kernel works with every ROM. However they are usually made to work with any ROM base don a version number. For example if a kernel is made for 2.2 than all ROMs that are made from 2.2 will work with it. The version number a kernel is meant to be used with is always in the OP of its thread.
And one last thing, if it is a kernel that has to be flashed via ODIN could someone give a step by step? I've got return to stock via ODIN memorized and I've done it plenty of times but not sure about the procedure for kernels.
Put the kernel in the PDA do not repartition, On a side note, when you are flashing things especially adding new kernels etc, It is better to go to recovery manually and do it from there. Sometimes the custom stuff or CWM have conflicts and it doesn't flash and you have to go odin back......... that's been my experience
so just use adb to get to stock recovery and then choose install packages? forgive me for my extreme detail
oka1 said:
Put the kernel in the PDA do not repartition, On a side note, when you are flashing things especially adding new kernels etc, It is better to go to recovery manually and do it from there. Sometimes the custom stuff or CWM have conflicts and it doesn't flash and you have to go odin back......... that's been my experience
Click to expand...
Click to collapse
Have you been using 2.2.1 ROMs?? I always have to ODIN from 2.2.1 ROMs cause I can't wipe data from CWM on them. So when it gets to that part of flashing the ROM it freezes
Sent from my SGH-T959 using XDA App
Okay so I am sort of confused between what a Rom and kernel is. I have flashed saurom rom rcvi on my phone and it comes with a kernel.
I just want to know what they exactly are.
I know a rom is basically like the operating system and their are different roms. What is a kernel tho? I have dags oc kernel though i havent oc yet. But what is it and what does it do? I assume it has something to do with the internal hardware and performance. How do you flash a kernel by itself, Can you even do that or does it always come coupled with a rom? Lets say i wanted to get the holonote kernel by itself would it be possible to do that? Can you mix and match roms and kernels?
Also where does theming come into play? I know that theming well basicallys themes and decorates your device. But how does that work? Do certain roms have themes, or can you put any themes on any roms? How do you flash a rom? Also themes shouldnt affect the performance right.
You may want to search the forums, specifically Q&A or development. People are going to flame you.
Sent from my SAMSUNG-SGH-I717 using XDA
http://en.wikipedia.org/wiki/Kernel_(computing)
In the simplest terms that I can think of, a kernel is a component within an operating system that acts as a bridge which allows software to communicate with hardware. I think Saurom is bundled with Hololight's kernel, and the two Collective roms are bundled with DaG's 0.2 OC kernel. You can flash an alternate kernel, as long as your ROM works with it. You can also flash just a kernel without flashing a ROM.
As for themes, most of them are designed for and require a specific ROM. The thread for the theme will be very clear as to which ROM is required to run it.
tenderchkn said:
http://en.wikipedia.org/wiki/Kernel_(computing)
In the simplest terms that I can think of, a kernel is a component within an operating system that acts as a bridge which allows software to communicate with hardware. I think Saurom is bundled with Hololight's kernel, and the two Collective roms are bundled with DaG's 0.2 OC kernel. You can flash an alternate kernel, as long as your ROM works with it. You can also flash just a kernel without flashing a ROM.
As for themes, most of them are designed for and require a specific ROM. The thread for the theme will be very clear as to which ROM is required to run it.
Click to expand...
Click to collapse
good call....,.
Here is another great example:
http://developer.android.com/guide/basics/what-is-android.html
Sent from my SGH-I717D using xda premium
Follow up to OP's question: Where does the kernel "live"? Is it in the boot partition?
I ask, because with all the flashing and at times wanting to go back, does a full nadroid restore (I see it restoring the boot partition, then system, then data) restore the previous kernel also?
Thanks.
If you are curious where stuff is... Take a cwm flashable zip, open it with 7 zip on your pc, follow the folder path in "meta-INF" til you get to a file called "updater-script" pull that out, open it up with NotePad and look and see where its writing to.
the kernel is written to
/dev/block/mmcblk0p8
So I had followed a guide (GalaxyS2Root.com i think the site was) for rooting my phone and successfully rooted my i777 device. Had no problems.
Upon researching this forum to start figuring out what else was possible with my phone, I found some information on what I had just installed and learned a few things and decided I wanted to install a custom ROM (but, I haven't gotten around to doing it yet)
So the package I had used to root my phone (which is using the AT&T-provided ICS rom) was "Siyah-v3.4.2-nomswap-I777.tar".
I noticed the "nomswap" in the name as well as the version.
I read a few peoples' posts asking about JB roms, and some replied that mic swap is required for all JB roms.
So, my questions:
1) I need to install an MSWAP kernel first before a JB rom? Or the other way around, rom first, then the MSWAP kernel?
2) If I install the MSWAP kernel but choose not to install a JB rom all the sudden, will my stock AT&T ICS rom continue to work fine?
3) Do I require the updated Siyah 4.3.3 kernel for the new JB roms?
Thanks.
The determining factor for whether or not you need mic swap is the ROM's base. Android version has nothing to do with it - some JB ROMs will require mic swap, others will not. Mic swap is for ROMs built on I9100 or AOSP base; without mic swap is for ROMs built on I777 base.
You should understand that every ROM is packaged with a working kernel, so there is no need to flash a different kernel on top of it. However, if you prefer a different kernel, you can always flash it after flashing the ROM.
chewyfood said:
So I had followed a guide (GalaxyS2Root.com i think the site was) for rooting my phone and successfully rooted my i777 device. Had no problems.
Upon researching this forum to start figuring out what else was possible with my phone, I found some information on what I had just installed and learned a few things and decided I wanted to install a custom ROM (but, I haven't gotten around to doing it yet)
So the package I had used to root my phone (which is using the AT&T-provided ICS rom) was "Siyah-v3.4.2-nomswap-I777.tar".
I noticed the "nomswap" in the name as well as the version.
I read a few peoples' posts asking about JB roms, and some replied that mic swap is required for all JB roms.
So, my questions:
1) I need to install an MSWAP kernel first before a JB rom? Or the other way around, rom first, then the MSWAP kernel?
2) If I install the MSWAP kernel but choose not to install a JB rom all the sudden, will my stock AT&T ICS rom continue to work fine?
3) Do I require the updated Siyah 4.3.3 kernel for the new JB roms?
Thanks.
Click to expand...
Click to collapse
You should have the most up to date kernel in general. All roms are packaged with kernels already otherwise it wouldn't run at all, so it overrides whatever is already there. And DO NOT USE ANYTHING FROM GALAXYS2ROOT. For the rest, you'll have to use Google as I've done my spoonfeeding for today.
Sent by from my Zanpakuto using Getsuga Tensho!
Also as a side note. Any of the leaks require u run the kernel the rom comes with . As in Siyah and Dream won't work with the leaks yet.
Thank you for all the information. Very useful.
On a side, I only learned of XDA and the AOKP ROM as a result of reading GalaxyS2Root.com.
So basically, with every release of a ROM, I can just flash it and be OK. I don't need to manually change the kernel beyond flashing the ROM itself...
If that is the case, what is the purpose of the kernel downloads (Siyah 4.3.3 or the sort)?
chewyfood said:
Thank you for all the information. Very useful.
On a side, I only learned of XDA and the AOKP ROM as a result of reading GalaxyS2Root.com.
So basically, with every release of a ROM, I can just flash it and be OK. I don't need to manually change the kernel beyond flashing the ROM itself...
If that is the case, what is the purpose of the kernel downloads (Siyah 4.3.3 or the sort)?
Click to expand...
Click to collapse
Because not all roms use Siyah as a kernel but it can be flashed separately.
Sent from Team Pirate! Using Tapatalk 2
I'm looking to update from Android 4.0.4. My SGH i777 is rooted from last year.
I have the clockwork mod recovery installed from last year. Using AOKP I think.
There's ROM's for 4.3 but I don't see any kernels posted here. Can someone point me in the right direction? Apparently the sg2 has left the limelight for a while now.
Once I get the kernel updated, does anyone have any good ROMs to recommend?
Thanks
ps You guys are an awesome community.
Which rom is a personal matter. You should try them yourself to see what you like. If you want Samsung Touchwiz based firmware, the latest version will be 4.1.2. To get 4.2.2 or 4.3, you will have to go with one of the AOSP based roms.
Since you have a custom kernel with CWM Recovery, just pick the firmware you want to try and flash it in recovery. You don't need to install another kernel first.
Wait, so all I have to do is pick another ROM? That's it? No firmware update?
vex390 said:
Wait, so all I have to do is pick another ROM? That's it? No firmware update?
Click to expand...
Click to collapse
firmware update? no. Whether 4.0.4 or 2.3.whatever, you already have have root/cwm; all that's left is a some recommended housecleaning*, then flash whatever ROM you want.
*either:
rom-cleaning-script
or:
factory reset
+format system
Mind = blown. Thanks so much guys!
In my experience with custom ROMs, I found that ShoStock3 v4.0 and UCMD8 v2.2 COOKED give the best battery life and stability, but I use the stock kernel for ShoStock and AJK v4.9 for UCMD8 COOKED. CM/PA/AOKP have given me subpar results in terms of stability and, most importantly (for me anyway), battery life. This is not to say that those other ROMs are bad, but for me, those haven't been working out. Your mileage may vary. Just my $0.02.
vex390 said:
I'm looking to update from Android 4.0.4. My SGH i777 is rooted from last year.
I have the clockwork mod recovery installed from last year. Using AOKP I think.
There's ROM's for 4.3 but I don't see any kernels posted here. Can someone point me in the right direction? Apparently the sg2 has left the limelight for a while now.
Once I get the kernel updated, does anyone have any good ROMs to recommend?
Thanks
ps You guys are an awesome community.
Click to expand...
Click to collapse
So you're looking for a rom. The rom you use will all depend on the type of software you like. If you like touchwiz, I recommend Shostock 3 4.0 or the Cooked Rom. If you're looking for a AOKP Android 4.2.2 rom, then I would use the Resurrection Remix rom, but remember, all roms differ on every phone. Not everyone gets the same results. I wouldn't use a 4.3 rom because its fairly new and pretty unstable on some phones, but if you really want to, I got the best results on the Carbon rom, but the battery life wasn't so good. Also, a lot of the 4.2 and 4.3 roms require you to flash gapps, which are the google apps for you phone. If you're looking for kernels, the usually come with the rom you download, so you don't really need to get a kernel. If you really want the extra customization and tweaks, there are some kernels out there, including AJK, Jeboo, and STI, that you can flash. I personally use AJK on a lot of my roms because I found it to be the most sucessful. I am running Shostock 3 with jeboo kernal right now. Shostock 3 has good performance, stability, and battery life and is touchwiz. So yeah, keep all this in mind when flashing a kernal. You don't to connect your phone to the computer or anything to flash a kernel. If you're rooted, you just have to have the rom in your phone storage or SD card and go into clockworkmod recovery and flash. Hope this helps and good luck on finding a rom that's right for you!
So I've tried a bunch of different ROMs (CleanROM, Alliance, Beans, CM, OMNI, "Stock", probably more), but I've never really understood kernels. It seems some custom ROMs have a kernel built in (or several to choose from via Aroma), while others do not. Right now I'm running AOKP (4.4.2) with the kernel from OMNI (3.0.64-OMNI-g5f47648), presumably because that was the previous ROM I flashed with a kernel. I'm not too concerned with customization, more with stability.
I've been having a few minor bugs and crashes and I'd like to try perhaps the stock kernel to see if that might help, but I have some questions:
1) Does it matter when flashing a kernel whether the ROM is TW or AOSP?
2) Are there multiple versions of kernels that correspond with the Android version of the ROM?
3) What's the best/easiest way to flash a kernel, presumably through the custom recovery like a ROM?
4) Where can I find the stock kernel? I found this thread (http://forum.xda-developers.com/showthread.php?t=2610870) with the stock MJ9 kernel, but going back to my first two questions I'm not sure if it would work with my current ROM.
Thanks ahead of time for any insight anyone can provide.
michaellasalle said:
So I've tried a bunch of different ROMs (CleanROM, Alliance, Beans, CM, OMNI, "Stock", probably more), but I've never really understood kernels. It seems some custom ROMs have a kernel built in (or several to choose from via Aroma), while others do not. Right now I'm running AOKP (4.4.2) with the kernel from OMNI (3.0.64-OMNI-g5f47648), presumably because that was the previous ROM I flashed with a kernel. I'm not too concerned with customization, more with stability.
I've been having a few minor bugs and crashes and I'd like to try perhaps the stock kernel to see if that might help, but I have some questions:
1) Does it matter when flashing a kernel whether the ROM is TW or AOSP?
2) Are there multiple versions of kernels that correspond with the Android version of the ROM?
3) What's the best/easiest way to flash a kernel, presumably through the custom recovery like a ROM?
4) Where can I find the stock kernel? I found this thread (http://forum.xda-developers.com/showthread.php?t=2610870) with the stock MJ9 kernel, but going back to my first two questions I'm not sure if it would work with my current ROM.
Thanks ahead of time for any insight anyone can provide.
Click to expand...
Click to collapse
1) Does it matter when flashing a kernel whether the ROM is TW or AOSP?
Yes. TW and AOSP kernels are different.. The only one, that I believe, that can be used with both is Devil kernel for Dual Booting
2) Are there multiple versions of kernels that correspond with the Android version of the ROM?
Yes. Usually every version of android that gets updated.. the kernel does as well
3) What's the best/easiest way to flash a kernel, presumably through the custom recovery like a ROM?
Yes you can flash kernels through a custom recovery. Most of the time they are included with the Rom that you flash. A lot of the custom ones out have flashable zip for you to flash them through a recovery.
4) Where can I find the stock kernel? I found this thread (http://forum.xda-developers.com/showthread.php?t=2610870) with the stock MJ9 kernel, but going back to my first two questions I'm not sure if it would work with my current ROM.
No this will NOT work with a AOSP rom.. The kernel will be specific to that ROM and every other TW 4.3 ROM, but NOT AOSP
lacoursiere18 said:
1) Does it matter when flashing a kernel whether the ROM is TW or AOSP?
Yes. TW and AOSP kernels are different.. The only one, that I believe, that can be used with both is Devil kernel for Dual Booting
Click to expand...
Click to collapse
Thanks for the explanations, that helps tremendously. I'm confused now, however, because several people on the AOKP thread (http://forum.xda-developers.com/showthread.php?t=2453566) claim to be on "stock kernel". Is there a stock kernel for AOSP that I'm missing?
michaellasalle said:
Thanks for the explanations, that helps tremendously. I'm confused now, however, because several people on the AOKP thread (http://forum.xda-developers.com/showthread.php?t=2453566) claim to be on "stock kernel". Is there a stock kernel for AOSP that I'm missing?
Click to expand...
Click to collapse
Yea the one that flashes with AOKP.. loll
lacoursiere18 said:
Yea the one that flashes with AOKP.. loll
Click to expand...
Click to collapse
Well that's what I thought, but why then would I be using an OMNI kernel (3.0.64-OMNI-g5f47648) when I have flashed the last three AOKP nightly ROMs that have come out? Or am I missing something here?
michaellasalle said:
Well that's what I thought, but why then would I be using an OMNI kernel (3.0.64-OMNI-g5f47648) when I have flashed the last three AOKP nightly ROMs that have come out? Or am I missing something here?
Click to expand...
Click to collapse
Maybe he uses that kernel.. AOSP kernels, I believe are pretty similar.. I may be wrong, I am by NO MEANS a kernel guru..I would open you zip of your ROM (AOKP) and take a peak.. if there is a boot.img than it flashes a kernel.. and if your says OMNI then thats the kernel the dev has used..
Stock
If I'm on the stock rom and want to go back to the original kernel can I just restore the boot img in recovery?
nealman said:
If I'm on the stock rom and want to go back to the original kernel can I just restore the boot img in recovery?
Click to expand...
Click to collapse
Should be able to if you back it up previously.. but make sure it is same rom.. TouchWiz for TouchWiz.. AOSP for AOSP
lacoursiere18 said:
Should be able to if you back it up previously.. but make sure it is same rom.. TouchWiz for TouchWiz.. AOSP for AOSP
Click to expand...
Click to collapse
Thank you sir. It worked just fine.
I have a noob question, I'm currently using n3bula 3.9 custom rom and it's been running fine for a while. I noticed that users chose the agni kernel whereas I chose the stock one. So my question is, is it possible to flash just the kernel from recovery without losing my data? I've spent so much time and effort customizing my phone, therefore, I just want to change the kernel. Any help will be appreciated. Thanks.
yazalsaidi said:
I have a noob question, I'm currently using n3bula 3.9 custom rom and it's been running fine for a while. I noticed that users chose the agni kernel whereas I chose the stock one. So my question is, is it possible to flash just the kernel from recovery without losing my data? I've spent so much time and effort customizing my phone, therefore, I just want to change the kernel. Any help will be appreciated. Thanks.
Click to expand...
Click to collapse
I would think that as long as it doesn't break anything you should be fine. Probably do a backup first if you're worried about it.
Thanks for the response Michael, however, that was the response I was dreading! I'm actually worried I'll lose my WhatsApp and Viber accounts because even if I backed up my data, I'd still have to register my old WhatsApp and Viber numbers all over again which I don't have anymore.. ??