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Viper XL and boot.img

Hey guys I just wanna to check and make sure I'm doing everything right before I flash cause I don't need anymore paperweights
1.I have successfully unlocked my bootloader and installed twrp recovery and rooted.
2. Now I want to back up my entire setup: rom, apps, setting, data, everything so that if I ever want to return to stock then I can. I have booted into twrp and ran backup and selected all options. Is that how you perform a nandroid backup in twrp or is there more to it?
3. I want to install team venom viper xl rom. Do I have to first flash boot.img first or is the kernel the same in stock and viper xl so that isn't necessary? Do I have to do I factory reset first or what?
I'm still new to this stuff so please bear with me. Thank for all your help!!

ImagioX1 said:
Hey guys I just wanna to check and make sure I'm doing everything right before I flash cause I don't need anymore paperweights
1.I have successfully unlocked my bootloader and installed twrp recovery and rooted.
2. Now I want to back up my entire setup: rom, apps, setting, data, everything so that if I ever want to return to stock then I can. I have booted into twrp and ran backup and selected all options. Is that how you perform a nandroid backup in twrp or is there more to it?
3. I want to install team venom viper xl rom. Do I have to first flash boot.img first or is the kernel the same in stock and viper xl so that isn't necessary? Do I have to do I factory reset first or what?
I'm still new to this stuff so please bear with me. Thank for all your help!!
Click to expand...
Click to collapse
Wipe flash Rom flash boot IMG sit back enjoy

ImagioX1 said:
Hey guys I just wanna to check and make sure I'm doing everything right before I flash cause I don't need anymore paperweights
1.I have successfully unlocked my bootloader and installed twrp recovery and rooted.
2. Now I want to back up my entire setup: rom, apps, setting, data, everything so that if I ever want to return to stock then I can. I have booted into twrp and ran backup and selected all options. Is that how you perform a nandroid backup in twrp or is there more to it?
3. I want to install team venom viper xl rom. Do I have to first flash boot.img first or is the kernel the same in stock and viper xl so that isn't necessary? Do I have to do I factory reset first or what?
I'm still new to this stuff so please bear with me. Thank for all your help!!
Click to expand...
Click to collapse
Different kernel. it is using the 2.41 RUU. So go ahead and flash the boot.img
Here's what you should do for any new ROM with a different kernel.
Wipe System
Factory Reset
Flash boot.img
Flash the ROM
flash gapps (if AOSP based)
reboot and have fun
When doing a nandroid backup, it is only necessary to backup
System
Data
Boot

Ok thanks for your response but I'm still a little confused. First did I back up my current rom properly so that I can return to it later on? Secondly does viper and boot img have to be flashed or can they be installed from sdcard via twrp? If they have to be flashed whats the fastboot command.?

ImagioX1 said:
Ok thanks for your response but I'm still a little confused. First did I back up my current rom properly so that I can return to it later on? Secondly does viper and boot img have to be flashed or can they be installed from sdcard via twrp? If they have to be flashed whats the fastboot command.?
Click to expand...
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You backed up fine, it just takes up a little more space.
You have to extract the boot.img from the ROM and put it in the same folder as fastboot.exe
open command prompt, and navigate to the folder fasboot.exe is in and do the following command
fasboot flash boot boot.img
If it gets stuck at waiting for device, reboot into your bootloader, boot into fastboot from there. and then try again.

ImagioX1 said:
Ok thanks for your response but I'm still a little confused. First did I back up my current rom properly so that I can return to it later on? Secondly does viper and boot img have to be flashed or can they be installed from sdcard via twrp? If they have to be flashed whats the fastboot command.?
Click to expand...
Click to collapse
Viper is the Rom u flash it from twrp it's. azip file that's fkashable so make it easy and flash viper there and than flash the boot IMG from fastboot the command is all over the forums I thinks it fastnoot flash boot.img

don't be confused. read.
you always have to flash boot.img in fastboot "fastboot flash boot boot.img" then flash the zip in twrp make sure to wipe, and don't download international roms. you still have to flash the boot.img from your backed up rom.
like a hundred threads asking the same stuff because no one wants to read

DvineLord said:
don't be confused. read.
you always have to flash boot.img in fastboot "fastboot flash boot boot.img" then flash the zip in twrp make sure to wipe, and don't download international roms. you still have to flash the boot.img from your backed up rom.
like a hundred threads asking the same stuff because no one wants to read
Click to expand...
Click to collapse
I'm sorry but I did read. I saw that if you have the same kernel as that of the rom you're flashing you don't have to flash boot.img. So I asked to see if stock and viper have the same kernel. I don't want to flash anything that will brick my phone.
Now one more question if you don't mind answering. I also saw that you can't downgrade RUU. So if viper is based on 2.41 RUU and stock is 2.20 RUU then will I be able to go stock after flashing viper?
I really do appreciate yalls help. i would be where I am if it weren't for you.

ImagioX1 said:
I'm sorry but I did read. I saw that if you have the same kernel as that of the rom you're flashing you don't have to flash boot.img. So I asked to see if stock and viper have the same kernel. I don't want to flash anything that will brick my phone.
Now one more question if you don't mind answering. I also saw that you can't downgrade RUU. So if viper is based on 2.41 RUU and stock is 2.20 RUU then will I be able to go stock after flashing viper?
I really do appreciate yalls help. i would be where I am if it weren't for you.
Click to expand...
Click to collapse
Yes. Just wipe you system and do a factory reset , and flash the boot.IMG for 2.20 and then flash the Rom.
If you want true stock 2.20 then you will have to relock your bootloader and then run the 2.20 RUU. You would only want to do this if making a warranty claim or something. If you want stock rooted, then yes, do what I said above
Sent from my HTC One XL using xda app-developers app

absolutelygrim said:
Yes. Just wipe you system and do a factory reset , and flash the boot.IMG for 2.20 and then flash the Rom
Sent from my HTC One XL using xda app-developers app
Click to expand...
Click to collapse
Ok got it. I do appreciate your help. Flashing now.

downgrading only refers to the ruu not the zipped roms. so you can't run 1.85 ruu after running 2.20 ruu/ota but you can still flash a rom based on 1.85.
if you are reflashing the same rom you don't have to reflash boot.img but if you are flashing a new rom then you need to flash boot.img. 7-zip will tell you the crc32 of files so you see tell if it's a different checksum.

Viper Xl's great. Seems to be slightly slower than stock on some task, but the lack of bloatware, and the extensive customization is worth it. Haven't found any bugs or nothing so far. If anyones familiar with viperxl though what is the last app in the app drawer? Its got a chinese name? When it loads it says Dolby Surround but all the writing is in chinese?

ImagioX1 said:
Viper Xl's great. Seems to be slightly slower than stock on some task, but the lack of bloatware, and the extensive customization is worth it. Haven't found any bugs or nothing so far. If anyones familiar with viperxl though what is the last app in the app drawer? Its got a chinese name? When it loads it says Dolby Surround but all the writing is in chinese?
Click to expand...
Click to collapse
That's because you flashed the Voodoo mod, it's apart of the mod, theres a chinese part and a english one called "Dolby Digital" or "Dolby Surround"

When I flash ViperXL 3.1.0 JB do I need to flash a radio too? My phone has hboot 1.4 and software 2.2, so I understand that I cant flash radio with hboot 1.4? Does this mean I need to downgrade my hboot/software version?

CrossFire78 said:
When I flash ViperXL 3.1.0 JB do I need to flash a radio too? My phone has hboot 1.4 and software 2.2, so I understand that I cant flash radio with hboot 1.4? Does this mean I need to downgrade my hboot/software version?
Click to expand...
Click to collapse
Most people have good luck w/out flashing another radio.

ronnie498 said:
Most people have good luck w/out flashing another radio.
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Hmm. Might there be a patch I'm missing out on? I just flashed one file -ViperXL 3.1.0 JB - Android File Host (692MB)
edit- Works now after another reinstall installed boot image first this time.

back up/restore

I have h-boot 1.14 withe twrp recovery, I backed up my phone with a previous rom i had and my question is would I have to install the image again after i restore the phone or should the phone restore without any problems.

cal4877 said:
I have h-boot 1.14 withe twrp recovery, I backed up my phone with a previous rom i had and my question is would I have to install the image again after i restore the phone or should the phone restore without any problems.
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Click to collapse
Most of the time yes you will have to install the boot .img manually coming from a different base or Rom... But say if you're on viper and your back up is the same base sense Rom you probably wouldn't have to reflash it... But if coming from cm10 or anything else yes

a box of kittens said:
Most of the time yes you will have to install the boot .img manually coming from a different base or Rom... But say if you're on viper and your back up is the same base sense Rom you probably wouldn't have to reflash it... But if coming from cm10 or anything else yes
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Click to collapse
Awesome thanks man, also im currently running nocturnals dirty rom I believe this is a AOKP rom, now if i want to flash another AOKP or any other CM10 base rom wouldnt the image be the same? or the i have to flash another image of the rom aswell?

cal4877 said:
Awesome thanks man, also im currently running nocturnals dirty rom I believe this is a AOKP rom, now if i want to flash another AOKP or any other CM10 base rom wouldnt the image be the same? or the i have to flash another image of the rom aswell?
Click to expand...
Click to collapse
Be safe and flash it

Is it necessary to reflash rom before restore or can you just fastboot flash boot.IMG and just restore backup?
Sent from my One X using xda premium

I believe you have to flash boot. IMG and than restore according to the comments up there

I just wish we had to option to downgrade the software/hboot without going thru all those steps listed, I remeber i had the htc inspire and you will be able to downgrade hboot by choosing a downgraded version of Ruuu files.

cal4877 said:
I just wish we had to option to downgrade the software/hboot without going thru all those steps listed, I remeber i had the htc inspire and you will be able to downgrade hboot by choosing a downgraded version of Ruuu files.
Click to expand...
Click to collapse
Yeah I loved the inspire that's what got me into android... But I got my phone on hboot 1.09 I've never done the downgrade process but I heard it can be pretty simple

[Q] Changing Stock kernels

Hi,
I have managed to put on a kernel that's not working. Is there a way to revert back to the original kernel? I do have a nandroid backup, but re-installing that didn't put on the old kernel.
I am using Liquidsmooth ROM. Any help would be appreciated.
Thanks.

if you can boot into the rom use flashimagegui, if not do the normal fastboot the boot.img then do it again with flashimagegui to get the modules.
what kernel did you try to flash? the only kernel that will work with new liquidsmooth is cm10.1_vz-oc-linaro.3.zip. it contains modules, if you aren't s-off then you need to flash boot.img in fastboot then flash again in recovery for the modules.

DvineLord said:
if you can boot into the rom use flashimagegui, if not do the normal fastboot the boot.img then do it again with flashimagegui to get the modules.
what kernel did you try to flash? the only kernel that will work with new liquidsmooth is cm10.1_vz-oc-linaro.3.zip. it contains modules, if you aren't s-off then you need to flash boot.img in fastboot then flash again in recovery for the modules.
Click to expand...
Click to collapse
I did exactly that, presuming that it was working... But I have been facing issues. The phone restarts every once in a while and I have managed to get to this condition after multiple wipes and restoring a backup. Anyways I don't know what the issue is I was just wondering how to revert back to the original kernel.

im running Liquid-JB-v2.1-RC2-evita.zip and cm10.1_vz-oc-linaro.3.zip. there seem to be some general issues with the rom that present as basically glitching and gets worse overtime atleast for me. im pretty sure it isnt related to the kernel. but to revert kernel just load the liquidsmooth zip into flashimagegui and itll pull the needed files, let it wipe cache and dalvik then reboot.

DvineLord said:
im running Liquid-JB-v2.1-RC2-evita.zip and cm10.1_vz-oc-linaro.3.zip. there seem to be some general issues with the rom that present as basically glitching and gets worse overtime atleast for me. im pretty sure it isnt related to the kernel. but to revert kernel just load the liquidsmooth zip into flashimagegui and itll pull the needed files, let it wipe cache and dalvik then reboot.
Click to expand...
Click to collapse
I do not have s-off does the flashimagegui works even without it?

strommer666 said:
I do not have s-off does the flashimagegui works even without it?
Click to expand...
Click to collapse
yes, Flash Image GUI
you should also s-off your phone it will make life ALOT easier and the process is simple take like 2 minutes.

DvineLord said:
yes, Flash Image GUI
you should also s-off your phone it will make life ALOT easier and the process is simple take like 2 minutes.
Click to expand...
Click to collapse
Thanks I'll make sure I do that..

also new stable build of liquidsmooth just got released. you should flash it. imma flash it with a clean full wipe. but you should s-off first so you dont have to flash boot.img separately every rom.

DvineLord said:
also new stable build of liquidsmooth just got released. you should flash it. imma flash it with a clean full wipe. but you should s-off first so you dont have to flash boot.img separately every rom.
Click to expand...
Click to collapse
Ya, I saw the new version wanted to try that which is why I wanted to got to the old kernel version. I had tried installing it with the linaro kernel but it gets stuck on the boot screen.
Update: - I installed the flash gui image, then extracted and installed the kernel , factory reset the phone, then installed the latest liquid smooth build. But it is still not going ahead of the boot animation.
Update 3 :- Got the old kernel back. Did a restore. Working fine now . But still for some reason I cannot install the new ROM yet.

strommer666 said:
Ya, I saw the new version wanted to try that which is why I wanted to got to the old kernel version. I had tried installing it with the linaro kernel but it gets stuck on the boot screen.
Update: - I installed the flash gui image, then extracted and installed the kernel , factory reset the phone, then installed the latest liquid smooth build. But it is still not going ahead of the boot animation.
Update 3 :- Got the old kernel back. Did a restore. Working fine now . But still for some reason I cannot install the new ROM yet.
Click to expand...
Click to collapse
you need everything. you don't need to extract the kernel. just load the whole zip file.

DvineLord said:
you need everything. you don't need to extract the kernel. just load the whole zip file.
Click to expand...
Click to collapse
I did load the full file and the flash gui image extracted the kernel. The thing is I have the kernel now, but still I can't seem to be able to install the new version of the LiquidSmooth build. I am doing a nandroid backup of this thing and try installing it again.

well new liquidsmooth is nice, im using cwm now as recovery since ive had tons of issues with twrp since version 2.2.2.0

[Q] Flashing Kernels

My apologies if this has been answered before -
1.) Should I flash a new kernel for my HOX? I am s-off, bootloader unlocked and running Viper XL 3.2.6.
2.) I know it is not absolutely necessary (flashing the kernel that is), but what are the advantages? what are the pitfalls should I be aware of?
3.) I am a relative noob so I don't think I'll be UV, OC or any of that cool stuff. So is stock better?
4.) Is there a thread out here where I can read about flashing kernels?
Thanks.

1:NO
2:None [edit] unless you flash aosp to sense kernel, visa versa.
3:matters of opinion
4:how did you achieve s-off and not know how to flash stuff?
Sent from my HOX w/CM10.1 4.2.2 s-off

Haha.. i know how to flash stuff.. it is just about the kernels.. and i wanted to read about kernels and such. not how to flash them..
thanks for the answers though

Flashing kernels is just like flashing anything else: Have a backup, clear cache/dalvik, and flash away.
The only thing to be aware of is that Sense roms need a Sense kernel, and AOSP roms need an AOSP kernel, and never the twain shall meet.
S-off removed the need to flash in fastboot that exists with 2.20 and later bases. The only reason to flash one now is because you want features in a custom kernel.
Custom kernels are "better" in the sense that you can do more with your phone, but they usually not as stable as stock, depending on how hard you push them.

Since I am not going to UV, OC etc, I guess it is better to stick with stock.
Thanks Elvis

sriramll said:
Since I am not going to UV, OC etc, I guess it is better to stick with stock.
Thanks Elvis
Click to expand...
Click to collapse
Keep in mind stability has as much to do with your phone as what kernel you pick. Some phones can't take overclocking or undervolting at all without losing stability; others (like mine) can run flat out without any problems. Only way to find out is to try it.

I'd definitely recommend looking into the ElementalX kernel. For me, it's increased my battery tremendously and it's also been a good bit smoother.

is there a way to go back to stock kernel? I guess flashing the rom again?

sriramll said:
is there a way to go back to stock kernel? I guess flashing the rom again?
Click to expand...
Click to collapse
You can extract the boot.img from the rom you flashed and flash that. This will be the stock kernel from that particular rom.
If you're using Viper, there's an option for flashing stock kernel within the viper installer so no need to worry about extracting or reflashing the whole rom.

Stock Kernel

Anyone know where I can locate the stock kernel? Im running Elemental X kernel and want to go back.

If you want the stock kernel, then fastboot flash the stock boot.img to both slots...you will lose twrp but that can always be installed again

BakedTator said:
If you want the stock kernel, then fastboot flash the stock boot.img to both slots...you will lose twrp but that can always be installed again
Click to expand...
Click to collapse
Thanks! I may do just that as the new update with Double Tap to wake isn't working and I'm assuming its due to Elemental X kernel that has that feature which I didn't enable during flash. I'll likely hold tight for a bit and see if someone posts a flashable via TWRP stock kernel so i dont need to go through the hassle of reinstalling TWRP (even though its not that time consuming).