Now this is my second Android tablet but I am still not sure about everything. I have installed a few kernels on my New Nexus to just see if I like it or not. Now with installing Kernels over kernels is it safe to do so? If not then why? I do clear the Dalvik cache and the cache since that is what you should preferably do before anything in recovery.
No.
when you flash a custom kernel you're already overwriting the stock or previous kernel.
Wiping caches for flashing kernels is also a complete waste of time.
I am not following who is doing what right now kernel wise but the only thing you may have to is reflash your ROM if a kernel Dev decides to something different with the ram disk. If not a the ROM than a reset stock kernel
Related
so im trying to get MIUI on my evo, but when i flash it it sticks at the sprint bootloader. i got the rom from MIUI. anyone help?
Did you wipe everything before flashing? Have you tried other kernels?
i have wiped data and cache. and im sorry but im new at this, what is a kernel
first of all, try also wiping data ( i kno its hard, just back up with titanium backup), system, boot, and battery stats. that should boot right up.
Did you wipe dalvik? You need to wipe data/cache/dalvik when switching ROMs.
If you don't know what a kernel is then I HIGHLY suggest you spend a little time reading up on all this because that is Android 101. You should have known what a kernel is before attempting to flash anything. A kernel is basically the interface between the software and hardware of your phone. It has all the drivers and instructions that tell your hardware what to do. They are flashed the same way ROMs are flashed and can affect performance dramatically. Different kernels perform differently on different EVOs so you need to find one that works well for your device. Sometimes the kernels that come packaged with ROMs don't work well on some EVOs and can cause booting and performance problems.
Mas wipey before flashy! Wipe all data, save for sd card, twice before flashing this rom. The savaged kernel that comes with the rom is just fine. Also, I would avoid titanium backup like the plague, especially if you are going to use MIUI.
Swyped from my CM7 EvO
Hi. I currently own the CDMA Galaxy Nexus, and I have rooted it.
I'm new on Android, and I have many, many questions.
One of the many questions I have is about ROMs and Kernels.
I know how to download and put it in my phone. However, what I'm confused is if I have to wipe the data and do a factory reset before I install a new kernel.
That applies to ROMs as well. Currently, I have the Revolution HD ROM, and I like it. If I want to put on a new ROM, would I have to do a factory reset and then install it?
The rooting world is so very confusing... I hope that someone could help me out.
new rom:
wipe factory, cache, dalvik
flash rom
flash gapps (if required)
flash kernel
reboot.
upgrade rom:
same rom (standard unless specified otherwise by dev)
wipe cache,dalvik [optional]
flash rom
flash gapps (if required)
flash kernel
upgrade kernel:
wipe dalvik, cache
flash kernel
I would add, that at first it seems like a pain, but after awhile, it's no problem.
Also, when you flash a new ROM (and gapps, depending on instructions) I'd recommend waiting on flashing the kernel until you've booted into the ROM and given it some time.
Follow zephik's guide and also remember to backup your apps and data using titanium backup or nandroid. Also it would be a good idea backup your stock radio so that you can reflash it after you flash from and kernel.
Sent from my Galaxy Nexus using xda premium
I have a AT&T Samsung Galaxy S3 (SGH-1747) that is running stock with root.
I have rooted my phone using the samsung toolkit located here: http://forum.xda-developers.com/showthread.php?t=1746665
Since that toolkit flashed a CWM Based recovery I have installed ROM Manager and flashed CWM Recovery version 6.0.1.2
My questions are..
- with my current setup.. am I technically running the "Stock" samsung kernel?
- why would you want to flash a different kernel to your phone?
- and is it necessary to flash a different kernel in order to use certain custom roms?
- At first I was leaning towards flashing CM10 nightly but the more I look at it.. I want to flash PARANOIDANDROID 2.22 http://forum.xda-developers.com/showthread.php?t=1818199
Is this rom fully compatible with my AT&T phone? and since i'm running stock with root, do I need to do anything special before flashing this rom? Factory reset? Wipe Data? I've already made a full nandroid backup.
Thank you!
- with my current setup.. am I technically running the "Stock" samsung kernel? I believe so
- why would you want to flash a different kernel to your phone? Different kernels do different things.. some have better batter life.. some let you OC and UC..
- and is it necessary to flash a different kernel in order to use certain custom roms?Well sometimes.. Well technically.. most kernels will work with most of the ROMS out there.. as long as you stay withing your phones threads.. But some ROMs have a kernal with them.. and some ROMS you need to flash your own kernel..
Diamond22 said:
- with my current setup.. am I technically running the "Stock" samsung kernel? I believe so
- why would you want to flash a different kernel to your phone? Different kernels do different things.. some have better batter life.. some let you OC and UC..
- and is it necessary to flash a different kernel in order to use certain custom roms?Well sometimes.. Well technically.. most kernels will work with most of the ROMS out there.. as long as you stay withing your phones threads.. But some ROMs have a kernal with them.. and some ROMS you need to flash your own kernel..
Click to expand...
Click to collapse
Thank you for the reply.
On the rom i'm wanting to flash for my SGH-i747 http://forum.xda-developers.com/showthread.php?t=1818199
The steps for flashing are as follows:
CWM: Install Zip: Rom: Download Here Make sure the file you download is PA-2.22-d2att.zip
CWM: Install Zip: Gapps: Download (These are the new ones)
CWM: Wipe Data/Factory Reset
CWM: Advanced/Wipe Dalvik Cache
Reboot and edit your Apps Dpi & Layout under Settings/Paranoid Settings - DO NOT RESTORE YOUR OLD PROPERTIES FOR NOW
Would i need to wipe data, factory reset, then also wipe dalvik cache BEFORE I install the rom and gapps since i'm running stock with root?
Thank you
i'm also reading that for paranoidandroid you must first flash CM10 then flash paranoid.. is this accurate?
umm.. not sure where you saw that you need to flash a CM rom before flashing the paranoid ROM..
I believe the Paranoid rom is based off CM
The instruction on the link you have, in my opinion, is wrong..
The way that i flash my roms is...
Wipe data/factory reset..
Wipe Cache
Wipe Dalvik
Format/Data
Fomat/System ( i think deletes backups) only do in emergency.aka optional step
Flash ROM
Flash Gapps.
THATS IT
Some people will wipe cache afer flashing a rom..
But if you wipe data/factory reset i believe deletes the ROM...
Diamond22 said:
umm.. not sure where you saw that you need to flash a CM rom before flashing the paranoid ROM..
I believe the Paranoid rom is based off CM
The instruction on the link you have, in my opinion, is wrong..
The way that i flash my roms is...
Wipe data/factory reset..
Wipe Cache
Wipe Dalvik
Format/Data
Fomat/System ( i think deletes backups) only do in emergency.aka optional step
Flash ROM
Flash Gapps.
THATS IT
Some people will wipe cache afer flashing a rom..
But if you wipe data/factory reset i believe deletes the ROM...
Click to expand...
Click to collapse
If you are already running CM10 then you don't need to wipe Cache. Just dalvik and data. Im pretty sure thats what was confusing, since this is based off of CM10.
DarthDerron said:
If you are already running CM10 then you don't need to wipe Cache. Just dalvik and data. Im pretty sure thats what was confusing, since this is based off of CM10.
Click to expand...
Click to collapse
yeah, I just keep reading and reading.. probably making this out to be more difficult than it really is just don't want to end up with a brick or anything.
I'm already on stock + root + latest CWM so I just need to put the files on my phone and flash but I believe these are the steps i need to take:
1- Download ROM and Gapps to internal sd card
2- Boot phone into recovery
3- WIPE Cache/Delvik/Data factory reset> Mounts and Storage- format system
4- Flash ROM and Gapps
Howdy y'all!
I'm currently running a 4.1.1 ROM, and would like to get on to MMuzzy's 4.2, but there are a ton of things I think I need to flash and want to make sure I get the order right. Your help will be much appreciated!
I am already using the latest version of TWRP.
I would like to flash the latest JB bootloader, and latest JB radios, but have never flashed either. Should I do these before flashing the ROM, or after? Should I do these before formatting cache? Should I format system or factory reset before flashing these, too?
I am planning to do factory reset, format cache and dalvik before flashing ROM, gapps and kernel. Do I need to do anything else to prep for flashing the ROM? Also, is it okay to flash all three at once, or should I do rom and gapps, let everything boot and restore from market, and only then flash kernel?
My main concern is the differences in file system between 4.1 and 4.2. I'm aware of the /0 subdirectory thing already, but I'd there anything else?
Thanks much!
Jamie
I wouldn't bother with the bootloader, but if you insist then you can flash the bootloader and the radios before or after. Doesn't matter.. Other than that, you do them ROM, gapps, kernel and I've done all three at once. Mmuzzy's is a good ROM. Enjoy.
First make a backup in TWRP
Factory reset
Wipe both caches
Install ROM, gapps, then kernel and reboot. (All at the sometime in that order)
I have heard its better to flash the kernel with the new ROM so just do it all in one flash.
Set everything up and let your phone sit for 15 minutes untouched and go for it.
Sent from my Galaxy Nexus using xda app-developers app
jrbedford said:
My main concern is the differences in file system tree between 4.1 and 4.2. I'm aware of the /0 subdirectory thing already, but I'd there anything else?
Thanks much!
Jamie
Click to expand...
Click to collapse
Just a small correction; file system change would mean switching from ext4 to f2fs, for example. That's not the case.
MartianCeo said:
First make a backup in TWRP
Factory reset
Wipe both caches
Install ROM, gapps, then kernel and reboot. (All at the sometime in that order)
I have heard its better to flash the kernel with the new ROM so just do it all in one flash.
Set everything up and let your phone sit for 15 minutes untouched and go for it.
Sent from my Galaxy Nexus using xda app-developers app
Click to expand...
Click to collapse
Watch out with restoring backups. Don't restore app/system data. OP is switching major versions.
sent from my Google Galaxy Nexus
Device:AT&T S3 SGH-I747
ROM:AOKP(Jellybean 4.2.2 )Task650 (4.5.2013) (AT&T)
Kernel:3.4.38 Underwear kernel,[email protected] #1,Fri Apr 5 08:26:52 PDT 2013
Max:1512 MHz
Min:378 MHz
Gov:interactive
IO:row
Issues: self reboots,turns off on its own at times,screen scrolls up/down on its own.
I have been running this ROM since day one basically and I always MAKE A NANDROID,Boot into recovery,Wipe data/factory reset, wipe cache, and wipe dalvik cache, then go into mounts & storage and format system,Flash ROM,Flash Gapps with every update but as of late ive got these issues and my thread has alot of people talking about kernels and im wondering if i flash the devs latest Underwear kernel 4.7.2013 that will fix these issues of mine? But at the same time ive never installed a kernel before ive always just flashed the devs updates and it seems i need to figure out how to get into flashing kernels so if ya can help me out with any info that will up my kernel game please help!
flashing a kernel is as simple as wiping cache & dalvik, flashing the kernel zip and rebooting. where it get's serious is when you're looking for the kernel. flashing one that's not for your device or version of android, say, will generally soft brick your phone. as long as you've done your research, flashing a kernel can be something you do easily in order to try and gain better performance or battery life. cheers