I recently rooted my nexus 7 and now im trying to flash clemsyn's kernel to it, however i haven't been able to get it to work. I've tried rebooting into recovery and wiping the cache and dalvic cache, then installing from zip, but it always fails. any idea why?
You flashed it on which rom? I think it's not compatible with your rom.
Ensure you read the OP of the thread to verify that the kernel is compatible with the version of Android that you're using. Remember, always RTFM, even if you think you know what you're doing.
Do you have to flash a ROM before you flash a kernel?
The Drugs said:
Do you have to flash a ROM before you flash a kernel?
Click to expand...
Click to collapse
Roms include a kernel and will overwrite the previously installed kernel. If you want to flash a custom kernel in conjunction with a rom, you always flash the kernel after the rom.
Oh! That makes sense. I'll try that later and see if it works
Related
Please forgive the noobish question..this is my 1st android product and I am still learning...
I am currently using Task650's rom version 5 along with the current pershoot kernal....If I want to move to Version 6
1. do i only wipe the delvrik cache,then flash version 6?
2. do I need to reflash the kernal after flashing version 6
3. what is the easiest way to backup all my apps if i have to wipe everything and then put them back?
i am using a rooted 10.6 wifi only...just really trying to get the hang of if there is an order to flashing roms and kernals like if i install a new rom or even update if i have to reflash kernal and reset setcpu?..thanks in advance.
Please Anyone... I really wanna do this...
divo3369 said:
Please forgive the noobish question..this is my 1st android product and I am still learning...
I am currently using Task650's rom version 5 along with the current pershoot kernal....If I want to move to Version 6
1. do i only wipe the delvrik cache,then flash version 6?
2. do I need to reflash the kernal after flashing version 6
3. what is the easiest way to backup all my apps if i have to wipe everything and then put them back?
i am using a rooted 10.6 wifi only...just really trying to get the hang of if there is an order to flashing roms and kernals like if i install a new rom or even update if i have to reflash kernal and reset setcpu?..thanks in advance.
Click to expand...
Click to collapse
1. Most scripts wipe dalvik cache when install or upgrading a ROM. Check with rom author if your not sure. With V. 6 from V. 5 its not necessary.
2. Yes, V. 6 will flash stock kernel. Unless noted in original post from ROM creator, custom ROMs "generally" have stock kernel. Other forums this is not true. You will need to setup SetCPU again after flashing.
3. Titanium Backup, it's a very powerful tool for backing up data apps. Rule of thumb, DO NOT backup and restore system apps, you can put your device in a bootloop or other bad things like applications that force close all the time.
Sent from my SAMSUNG-SGH-I897 using xda premium
divo3369 said:
2. do I need to reflash the kernal after flashing version 6
Click to expand...
Click to collapse
Just a FYI: no need to boot the rom first though. Flash ROM, directly flash Kernel and then boot up. Good luck!
jorisvdende said:
Just a FYI: no need to boot the rom first though. Flash ROM, directly flash Kernel and then boot up. Good luck!
Click to expand...
Click to collapse
I've seen it recommended to reboot between the ROM install and kernel install. Though I can't say that there is harm that I am aware of.
for #1, task650 said: "You only need to wipe dalvich and cache to upgrade from V5"
for #2, havent tried to flash the kernel yet but will give a shoot asap
Any advice how to do it is more welcomed
for #3, titanium backup ftw
Why is it that I have to reflash a custom kernel every time I flash the newest build of a rom?
Any time you flash a custom ROM, it will always include some kernel along with it. Hence, when you flash the newest build of a rom, you're also re-flashing the original kernel that it came with.
btse said:
Any time you flash a custom ROM, it will always include some kernel along with it. Hence, when you flash the newest build of a rom, you're also re-flashing the original kernel that it came with.
Click to expand...
Click to collapse
I see. Thanks! So I pretty much gotta flash my own custom kernel every time then?
As far as I know yes. There could possible be some way of flashing without the kernel, but I think it's much safer to just flash the whole custom ROM and then re-flashing your own custom kernel.
Yeah the easiest thing to do is just install the ROM with its kernel then just flash your kernel of choice.
Sent from my Nexus 4 using Tapatalk 2
I am currently running a Nexus 4 with PARANOIDANDROID 2.99b+ (Feb03) flashed with the Franco r53 kernel.
I wanted to try out the Matrix 6.5 kernel on my phone and was wondering if there is any step that I need to perform before flashing the new kernel. I found the following post that includes a cleaner script: http://forum.xda-developers.com/showthread.php?t=2121701
I was wondering if this is required or if we can simply flash the matrix kernel over the franco kernel. Would that be possible?
Also, would it be possible to flash the new PARANOIDANDROID release (assuming it includes a kernel) then flash the matrix kernel over that? Would this cause problems because the cleaner script was not run before flashing the new rom which has its own kernel?
Was not sure how it exactly works and was hoping that someone would be able to help me out and clarify the process.
Currently, I think your safest option is to flash the newest version of the PA rom and gapps and then flash the kernel that you want. Because a lot of the kernel developers are are making changes to things that may not be overwriten when flashing a kernel from a different developer. For example I think that franco makes changes to the ramdisk that some other kernel devs don't touch.
linelock said:
Currently, I think your safest option is to flash the newest version of the PA rom and gapps and then flash the kernel that you want. Because a lot of the kernel developers are are making changes to things that may not be overwriten when flashing a kernel from a different developer. For example I think that franco makes changes to the ramdisk that some other kernel devs don't touch.
Click to expand...
Click to collapse
Cool, so I guess when we flash the rom and gapps it resets any changes that may have been made by Franco's kernel (or any other kernel for that matter). Hence, running any cleaner script is not required. Is this true?
Also, when flashing the kernel I wipe cahce, wipe dalvik, flash kernel, reboot. I read in another post that you should let it run for 10-15 minutes then reboot again to let the kernel "settle in". Is this actually required?
if you are running franco kernel, you want to either reflash your rom then the kernel, or flash the roms boot.img then the kernel. coming from other kernels, just flash the new kernel on top. the reason being that franco kernel uses its own ramdisk(and you want your roms ramdisk).
---------- Post added at 03:57 PM ---------- Previous post was at 03:56 PM ----------
jauwad.arshad said:
Cool, so I guess when we flash the rom and gapps it resets any changes that may have been made by Franco's kernel (or any other kernel for that matter). Hence, running any cleaner script is not required. Is this true?
Also, when flashing the kernel I wipe cahce, wipe dalvik, flash kernel, reboot. I read in another post that you should let it run for 10-15 minutes then reboot again to let the kernel "settle in". Is this actually required?
Click to expand...
Click to collapse
you do not wipe anything when flashing kernels, there is no need. wiping cache or dalvik has nothing to do with kernels, its just a misconception that keeps getting passed along.
simms22 said:
if you are running franco kernel, you want to either reflash your rom then the kernel, or flash the roms boot.img then the kernel. coming from other kernels, just flash the new kernel on top. the reason being that franco kernel uses its own ramdisk(and you want your roms ramdisk).
---------- Post added at 03:57 PM ---------- Previous post was at 03:56 PM ----------
you do not wipe anything when flashing kernels, there is no need. wiping cache or dalvik has nothing to do with kernels, its just a misconception that keeps getting passed along.
Click to expand...
Click to collapse
Awesome, thanks for the info. So I guess it is a safe practice to flash the boot.img (or just update the rom if you were going to anyways) and then flash the kernel.
jauwad.arshad said:
Awesome, thanks for the info. So I guess it is a safe practice to flash the boot.img (or just update the rom if you were going to anyways) and then flash the kernel.
Click to expand...
Click to collapse
yup. i tell people to just reflash their rom(and gapps) with the kernel, then reboot if they were running franco kernel. but its safe to flash the stock or your roms boot.img also, then the kernel.
simms22 said:
then reboot if they were running franco kernel.
Click to expand...
Click to collapse
I am not sure what you meant by that.
What I get out of all of this, is that if I want to try a new kernel this is what I should do in recovery:
Factory reset + wipe cache + dalvik cache
Flash new rom (PA rom in my example)
Flash gapps
Flash custom kernel if desired (Franco's kernel in my example)
Reboot
Is that correct or am I missing a step/doing something extra?
You might notice if you update your ROM (e.g. the next time PA gets updated, or if you switch to CM nightlies) that during the flash, the kernel will be overwritten - no matter which kernel you are using.
For example, flashing CM installs the CM kernel - regardless of if I was running Franco's before that. This is why apps like CyanDelta (which supports incremental updates to the ROM, but also the flashing of zips *after* flashing the ROM) are so handy. Every three days, I flash the latest CM nightly, and then Franco's kernel. If I left Franco's kernel off the CyanDelta list, the phone would be using the latest CM kernel after the flash.
EDIT: Your steps look good, if not a little bit overly protective. For instance, I don't think a full factory reset is required to test out a different kernel, generally speaking. Obviously, it wouldn't hurt to do... just takes time.
twitchcity said:
You might notice if you update your ROM (e.g. the next time PA gets updated, or if you switch to CM nightlies) that during the flash, the kernel will be overwritten - no matter which kernel you are using.
For example, flashing CM installs the CM kernel - regardless of if I was running Franco's before that. This is why apps like CyanDelta (which supports incremental updates to the ROM, but also the flashing of zips *after* flashing the ROM) are so handy. Every three days, I flash the latest CM nightly, and then Franco's kernel. If I left Franco's kernel off the CyanDelta list, the phone would be using the latest CM kernel after the flash.
EDIT: Your steps look good, if not a little bit overly protective. For instance, I don't think a full factory reset is required to test out a different kernel, generally speaking. Obviously, it wouldn't hurt to do... just takes time.
Click to expand...
Click to collapse
That is pretty cool. Would that same app work on the PA rom or is it just for CM nightly builds?
Yeah, I am doing the factory reset because its a new version of the PA rom. I prefer not to simply flash over my current rom.
If you're running the latest PA on a mako, just get their 'contrasty' kernel and no need for your voodoo rituals
I am currently on franco kernel milestone 2 and want to try trinity kernel.
I have taken a 'back-up' of the stock kernel on the franco kernel updater app before i flashed franco.
Can I now restore my phone to stock kernel using this back-up and then flash trinity?
Will this work?
auto freak said:
I am currently on franco kernel milestone 2 and want to try trinity kernel.
I have taken a 'back-up' of the stock kernel on the franco kernel updater app before i flashed franco.
Can I now restore my phone to stock kernel using this back-up and then flash trinity?
Will this work?
Click to expand...
Click to collapse
you can. or you can just reflash your rom and trinity, dont wipe a single thing. just flash the rom, kernel, then reboot.
jauwad.arshad said:
I am not sure what you meant by that.
What I get out of all of this, is that if I want to try a new kernel this is what I should do in recovery:
Factory reset + wipe cache + dalvik cache
Flash new rom (PA rom in my example)
Flash gapps
Flash custom kernel if desired (Franco's kernel in my example)
Reboot
Is that correct or am I missing a step/doing something extra?
Click to expand...
Click to collapse
Only if you have franco now and switch to another kernel. So if you want to flash franco you don't have to wipe anything.
Hi, I have some question about flashing a custom kernel (+Franco kernel):
1. Let's say I have Franco Kernel and a new version comes out, do I need to flash it again or I can use the app to flash it? Also, do I need to wipe something before I flash?
2. If I switch to another kernel from Franco, what exactly do I have to do? Just wipe cache+dalvik and re-flash my rom?
3. Will I have to re-flash the kernel after each rom update?
Thanks!
Hi I'm not sure about #1 because I don't use Franco's app, but 2) Sometimes you can just flash a new kernel over the old one. Personally I prefer to dirty flash my ROM, then flash my choice of kernel. 3) You'll need to flash the kernel after a ROM update. The ROM is compiled with it's own kernel.
chrisbo4 said:
Hi I'm not sure about #1 because I don't use Franco's app, but 2) Sometimes you can just flash a new kernel over the old one. Personally I prefer to dirty flash my ROM, then flash my choice of kernel. 3) You'll need to flash the kernel after a ROM update. The ROM is compiled with it's own kernel.
Click to expand...
Click to collapse
So I need to dirty flash my ROM (=wipe cache+dalvik & flash) then install a new kernel? Thanks.
Still need an answer to Q1 though
I use CM 10.1 and just flash the new Franco kernel ZIP over the old one and it's been fine...
[email protected] said:
Hi, I have some question about flashing a custom kernel (+Franco kernel):
1. Let's say I have Franco Kernel and a new version comes out, do I need to flash it again or I can use the app to flash it? Also, do I need to wipe something before I flash?
2. If I switch to another kernel from Franco, what exactly do I have to do? Just wipe cache+dalvik and re-flash my rom?
3. Will I have to re-flash the kernel after each rom update?
Thanks!
Click to expand...
Click to collapse
1. When a new version comes out all you have to do is flash the new version on top of the old one. You can simply download it from the app and let it do a auto-flash. No need to wipe anything.
2. It depends. Some kernels will need you to flash the stock kernel first then flash the custom kernel you want to you. Ex. Faux kernel. Don't forget to read the first post of every thread to look for installation instructions.
3. Yes, you will need to reflash the kernel after a rom is flashed. Make sure to flash the kernel last.
Sent from my SGH-T999 using Tapatalk 2
scream4cheese said:
1. When a new version comes out all you have to do is flash the new version on top of the old one. You can simply download it from the app and let it do a auto-flash. No need to wipe anything.
2. It depends. Some kernels will need you to flash the stock kernel first then flash the custom kernel you want to you. Ex. Faux kernel. Don't forget to read the first post of every thread to look for installation instructions.
3. Yes, you will need to reflash the kernel after a rom is flashed. Make sure to flash the kernel last.
Sent from my SGH-T999 using Tapatalk 2
Click to expand...
Click to collapse
1. Does the app need a special recovery to work? I have a TWRP recovery..
2. What do you mean by stock kernel? And is it correct that Franco is the only kernel that I need to re-flash my ROM to switch to another kernel because it changes something in the ramdisk? If so, do I just need to do a dirty flash?
Thanks.
[email protected] said:
1. Does the app need a special recovery to work? I have a TWRP recovery..
2. What do you mean by stock kernel? And is it correct that Franco is the only kernel that I need to re-flash my ROM to switch to another kernel because it changes something in the ramdisk? If so, do I just need to do a dirty flash?
Thanks.
Click to expand...
Click to collapse
1. No special recovery needed. I too use TWRP.
2. Nothing special need be done to flash to Franco. Going from Franco to another kernel it is easiest to reflash your ROM. You are correct about the ramdisk.
grubbster said:
1. No special recovery needed. I too use TWRP.
2. Nothing special need be done to flash to Franco. Going from Franco to another kernel it is easiest to reflash your ROM. You are correct about the ramdisk.
Click to expand...
Click to collapse
2. So going from Franco to another kernel - just dirty flash without a factory reset?
Thank you very much.
[email protected] said:
1. Does the app need a special recovery to work? I have a TWRP recovery..
2. What do you mean by stock kernel? And is it correct that Franco is the only kernel that I need to re-flash my ROM to switch to another kernel because it changes something in the ramdisk? If so, do I just need to do a dirty flash?
Thanks.
Click to expand...
Click to collapse
1. Having a recovery is good. When you download a new kernel there is an option to let it do a auto-flash and it'll flash it you. The phone will reboot itself when it's done.
2. Some custom kernels need to flash the stock kernel, (the original factory kernel that it's shipped in) if you're going to switch to another custom kernel like Faux's kernel. So when the next time you want to make a switch to another kernel, please make sure to read the first post of the thread to look for instructions to install the kernel. If you're updating to a new rom or switching to a new rom, you will need to flash whichever custom kernel you were using on top of the updated/new rom. When you flash a new rom, it is recommended to do a full wipe to avoid issues. After every rom flash you need to flash the kernel.
http://forum.xda-developers.com/showthread.php?t=2008222
---------- Post added at 10:20 AM ---------- Previous post was at 10:19 AM ----------
[email protected] said:
2. So going from Franco to another kernel - just dirty flash without a factory reset?
Thank you very much.
Click to expand...
Click to collapse
No. no. You don't need to do a factory reset. I don't know how many times I'm going to say this but read my answers to all of your questions again. (Don't mean to sound like a jerk or anything)
scream4cheese said:
1. Having a recovery is good. When you download a new kernel there is an option to let it do a auto-flash and it'll flash it you. The phone will reboot itself when it's done.
2. Some custom kernels need to flash the stock kernel, (the original factory kernel that it's shipped in) if you're going to switch to another custom kernel like Faux's kernel. So when the next time you want to make a switch to another kernel, please make sure to read the first post of the thread to look for instructions to install the kernel. If you're updating to a new rom or switching to a new rom, you will need to flash whichever custom kernel you were using on top of the updated/new rom. When you flash a new rom, it is recommended to do a full wipe to avoid issues. After every rom flash you need to flash the kernel.
http://forum.xda-developers.com/showthread.php?t=2008222
---------- Post added at 10:20 AM ---------- Previous post was at 10:19 AM ----------
No. no. You don't need to do a factory reset. I don't know how many times I'm going to say this but read my answers to all of your questions again. (Don't mean to sound like a jerk or anything)
Click to expand...
Click to collapse
I think that's what he was saying/asking... That's correct, no need to factory reset.
Hello, I have I9505 with Philz Recovery and SlimBean ROM.
I've tried to flash this kernel, but my device stuck at boot,
tried flashing Chronic 4.2 kernel - reboots after 1-2 minutes.
Please, give the link to stock kernel (as far as I remember is was something like "....3.4.0.....")
Kondra007 said:
Hello, I have I9505 with Philz Recovery and SlimBean ROM.
I've tried to flash this kernel, but my device stuck at boot,
tried flashing Chronic 4.2 kernel - reboots after 1-2 minutes.
Please, give the link to stock kernel (as far as I remember is was something like "....3.4.0.....")
Click to expand...
Click to collapse
http://samsung-updates.com/device/?id=GT-I9505
go to the link click on the firmware download u using get the kernal anf flash it
Is it compatible with custom ROM and custom Recovery?
Kondra007 said:
Is it compatible with custom ROM and custom Recovery?
Click to expand...
Click to collapse
Why would you flash a stock kernel on a custom rom? No benefit in that, only possible trouble. It is better to stick with the kernel that comes with the rom.