[Q] Going back to original kernal. - Nexus 7 Q&A, Help & Troubleshooting

I'm thinking of flashing Trinity kernel on my Nexus 7. If I have troubles after flashing the Trinity kernel and want to revert back to my present kernel do I restore a nandroid backup or is there something else I have to do to get present kernel back? Am currently running CM 10.1 jb 4.2.1 on my Nexus 7. Any input would be greatly appreciated. Thanks.

Just do a dirty flash (flash CM10.1 again without factory reset, just wipe cache and dalvik). Your kernel will be overwritten.

kevk60 said:
I'm thinking of flashing Trinity kernel on my Nexus 7. If I have troubles after flashing the Trinity kernel and want to revert back to my present kernel do I restore a nandroid backup or is there something else I have to do to get present kernel back? Am currently running CM 10.1 jb 4.2.1 on my Nexus 7. Any input would be greatly appreciated. Thanks.
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davisac said:
Just do a dirty flash (flash CM10.1 again without factory reset, just wipe cache and dalvik). Your kernel will be overwritten.
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Click to collapse
yup, thats the easiest way. but you dont have to wipe anything, not even dalvik or cache. you can always extract the boot.img from the cm rom and flash it via fastboot too.

Thanks simms. I'm still trying to figure everything out just got my Nexus for Christmas.

davisac said:
Just do a dirty flash (flash CM10.1 again without factory reset, just wipe cache and dalvik). Your kernel will be overwritten.
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Click to collapse
Thanks for all your info. Appreciate it. Have a good one!

How about if Im using stock rom and I want to flash a different kernel, what should I do?

Leonhan said:
How about if Im using stock rom and I want to flash a different kernel, what should I do?
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Flash the kernel? Lol !

Wilks3y said:
Flash the kernel? Lol !
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Ive read that franco has a ramdisk of his own, how do I apply a new kernel without problems if I will try a different one (say motley kernel)?

Trinity kernel working great.
kevk60 said:
Thanks for all your info. Appreciate it. Have a good one!
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Click to collapse
Flashed Trinity kernel on my Nexus 7 and it is great. Am running CM 10.1 JB 4.2.1 latest nightly and so far everything is working awesome. Thanks for everyones input. Thanks to morfic for a wonderful kernel. Boom! Freak out now.

Related

[Q] Reverting back to stock from franco.kernel

I have a quick question.
I flashed the franco kernel using franco's app, and also made a backup of my stock kernel using the same app before flashing.
If i decide to revert back to stock kernel, all i'll have to do is flash the stock kernel backup, right? It won't mess anything up?
v9s said:
I have a quick question.
I flashed the franco kernel using franco's app, and also made a backup of my stock kernel using the same app before flashing.
If i decide to revert back to stock kernel, all i'll have to do is flash the stock kernel backup, right? It won't mess anything up?
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Click to collapse
Yes this should work :good:
mihahn said:
Yes this should work :good:
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what happens if I did not make a backup of the stock kernel?
sensei22 said:
what happens if I did not make a backup of the stock kernel?
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Dirty flash your rom is what i did .
Sent from my Nexus 7
jlg19753 said:
Dirty flash your rom is what i did .
Sent from my Nexus 7
Click to expand...
Click to collapse
I'm actually getting ready to flash Franco's Rom now, I figured since the kernel is in the boot image, and if I make a backup with TWRP (doing full since I want to keep my latest changes). Then if I don't like it I can just restore only the boot image portion of it assuming everything else remains the same.
jlg19753 said:
Dirty flash your rom is what i did .
Sent from my Nexus 7
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Click to collapse
I'm sorry but I don't know what you mean by dirty flash
sensei22 said:
I'm sorry but I don't know what you mean by dirty flash
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Click to collapse
Flash ROM and gapps don't wipe anything = dirty flash
Sent from my Nexus 4

Nexus 4 lag after kernel restore

Hi Everyone,
I have stock rom with franco kernel. Yesterday I reverted back to stock kernel and noticed that it lags now when I wake it from the unlock screen. I did a factory reset, but the lag is still there. This was never there when I had it from the begining. Should I flash the factory image?? Can the backup stock kernel get corrupted?
delf0s said:
Hi Everyone,
I have stock rom with franco kernel. Yesterday I reverted back to stock kernel and noticed that it lags now when I wake it from the unlock screen. I did a factory reset, but the lag is still there. This was never there when I had it from the begining. Should I flash the factory image?? Can the backup stock kernel get corrupted?
Click to expand...
Click to collapse
Try _motley's reset kernel, it restores other files that may have been changed too
http://forum.xda-developers.com/attachment.php?attachmentid=1737875&d=1361118181
Edit.. Note the link is the 4.2.2 version, check his thread if you need 4.2.1 reset.
delf0s said:
Hi Everyone,
I have stock rom with franco kernel. Yesterday I reverted back to stock kernel and noticed that it lags now when I wake it from the unlock screen. I did a factory reset, but the lag is still there. This was never there when I had it from the begining. Should I flash the factory image?? Can the backup stock kernel get corrupted?
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Click to collapse
after using franco kernel, you have to reflash your rom then kernel. franco kernel hides tweaks inits ramdisk. flashing another kernel on top will not change this ramdisk, so you have to flash your rom first(no wiping anything).
As I stated above...can I just fastboot then flash the factory image??
delf0s said:
As I stated above...can I just fastboot then flash the factory image??
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absolutely. then youll need to reroot. its MUCH easier to flash a rooted stock(thats what im guessing you are using) rom though.
simms22 said:
absolutely. then youll need to reroot. its MUCH easier to flash a rooted stock(thats what im guessing you are using) rom though.
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Click to collapse
I would have to flash a custom recovery...then download a CWM stock rom and flash, huh? I currently have stock recovery
delf0s said:
I would have to flash a custom recovery...then download a CWM stock rom and flash, huh? I currently have stock recovery
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Click to collapse
You can fastboot flash the OEM boot.img; I'm guessing you fastbooted Franco's kernel?
http://forum.xda-developers.com/attachment.php?attachmentid=&d=1361814949
Flash this reset kernel which has the INITFRAMS.
all will be ok.
You don't have to reflash the whole phone.
Cheers
Sent from my Nexus 4 using xda premium
CMNein said:
You can fastboot flash the OEM boot.img; I'm guessing you fastbooted Franco's kernel?
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Click to collapse
No...I flashed the Franco kernel using the updater app.
mariosraptor said:
http://forum.xda-developers.com/attachment.php?attachmentid=&d=1361814949
Flash this reset kernel which has the INITFRAMS.
all will be ok.
You don't have to reflash the whole phone.
Cheers
Sent from my Nexus 4 using xda premium
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Click to collapse
Link is broken
delf0s said:
No...I flashed the Franco kernel using the updater app.
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Either way, you can just flash the stock boot.img via fastboot and you're good to go.
CMNein said:
Either way, you can just flash the stock boot.img via fastboot and you're good to go.
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I suppose I can...however....I currently have a chromebook (ARM)...dunno if I can use fastboot with it. I wanted a solution I could do straight on my phone, like, flashing CWM recovery, then downloading the stock (rooted, CWM flashable) ROM...and flashing it.
Get it from here http://forum.xda-developers.com/showthread.php?t=2101488
First post at attachments
Sent from my Nexus 4 using xda premium
---------- Post added at 11:50 PM ---------- Previous post was at 11:49 PM ----------
delf0s said:
I suppose I can...however....I currently have a chromebook (ARM)...dunno if I can use fastboot with it. I wanted a solution I could do straight on my phone, like, flashing CWM recovery, then downloading the stock (rooted, CWM flashable) ROM...and flashing it.
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Just cause i am curious, why did you changed from Franco's?
Sent from my Nexus 4 using xda premium
simms22 said:
absolutely. then youll need to reroot. its MUCH easier to flash a rooted stock(thats what im guessing you are using) rom though.
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Click to collapse
Could you clarify this for me, If in the future I need to do it? So, after leaving franco kernel, i.e. If I'm using franco kernel and wanna go back to completely stock again; before flashing stock I'll need to re-flash the current rom that I'm using, to re-flash the rom's kernel and this way replace the ramdisk to the stock from rom? If I'm wrong, please correct me; you guys are awesome!
vjales said:
Could you clarify this for me, If in the future I need to do it? So, after leaving franco kernel, i.e. If I'm using franco kernel and wanna go back to completely stock again; before flashing stock I'll need to re-flash the current rom that I'm using, to re-flash the rom's kernel and this way replace the ramdisk to the stock from rom? If I'm wrong, please correct me; you guys are awesome!
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yes, kinda. reflashing your rom will replace francos ramdisk. all the other kernels use anykernel, so dont have ramdisk included. generally, its only after using franco kernel do you want to do this, the other kernels you can flash right over each other. anykernel kernels grab the available ramdisk. theres plenty of stock/aosp rooted roms here on xda, any of them should work for you.

Flash back to stock kernel before flashing PA?

Hi all,
I'm running stock 4.2.2 rom with Matr1x kernel, I want to give PA a go but I am wondering if i need to flash the stock kernel before flashing the paranoid android rom?
Thanks in advance :good:
keepittidy said:
Hi all,
I'm running stock 4.2.2 rom with Matr1x kernel, I want to give PA a go but I am wondering if i need to flash the stock kernel before flashing the paranoid android rom?
Thanks in advance :good:
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No just wipe flash ROM gapps and reboot
From my BLACKED OUT N4
Thanks for the fast reply..
When I wipe am I right in thinking that my photos etc on the sdcard part of the nexus 4's memory will be safe? I have backed them up but just wanted to check
Thanks
Sent from my Nexus 4 using xda app-developers app
keepittidy said:
Thanks for the fast reply..
When I wipe am I right in thinking that my photos etc on the sdcard part of the nexus 4's memory will be safe? I have backed them up but just wanted to check
Thanks
Sent from my Nexus 4 using xda app-developers app
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When you select factory reset in a custom recovery it will not erase the SD card partition
From my BLACKED OUT N4
spaceman860 said:
When you select factory reset in a custom recovery it will not erase the SD card partition
From my BLACKED OUT N4
Click to expand...
Click to collapse
Thanks again....
I'll get right on it!!

[Q] [ROM JSS15Q]Carbon Beast ROM 4.3 bootloop

I'm coming from stock ROM, rooted.
I tried to flash [ROM JSS15Q]Carbon Beast ROM 4.3 v13 (05.09.2013) but stuck on boot-loop.
I restored my nandroid and tried to re-flash it but again had boot-loop
Can anybody help me???
stergios_tsu said:
I'm coming from stock ROM, rooted.
I tried to flash [ROM JSS15Q]Carbon Beast ROM 4.3 v13 (05.09.2013) but stuck on boot-loop.
I restored my nandroid and tried to re-flash it but again had boot-loop
Can anybody help me???
Click to expand...
Click to collapse
You have to wipe data before flashing a ROM.
abaaaabbbb63 said:
You have to wipe data before flashing a ROM.
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I forgot to mention... I made a clean installation (wiped data/ factory reset , flashed the ROM and wiped cache/dalvik)
Are you flashing compatible GApps? Are you flashing any additional zips, like kernels or radios?
Harmonizeddeath said:
Are you flashing compatible GApps? Are you flashing any additional zips, like kernels or radios?
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kernel ang GApps are included in ROM. I'm coming from google's 4.3 so i dont have to flash any radios
stergios_tsu said:
kernel ang GApps are included in ROM. I'm coming from google's 4.3 so i dont have to flash any radios
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Did the md5 match?
nj0ywatch1np0rn said:
Did the md5 match?
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what do you mean???
Same thing happened to me. The solution is to flash the rom, then flash purity kernel 153, and then reboot back to recovery and flash the rom again.
WARpig5 said:
Same thing happened to me. The solution is to flash the rom, then flash purity kernel 153, and then reboot back to recovery and flash the rom again.
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Thanks it worked fine:good:

[Q] CM 10.2 Nightly Update Help

Noob Here. I have a CM 10.2 Nightly flashed (last weeks version) and I wish to update as it contains some fixes. Have I got to factory reset, wipe cache..etc? or do i simply flash the new nightly? also will I lose all my apps?
Thanks
ZaViX said:
Noob Here. I have a CM 10.2 Nightly flashed (last weeks version) and I wish to update as it contains some fixes. Have I got to factory reset, wipe cache..etc? or do i simply flash the new nightly? also will I lose all my apps?
Thanks
Click to expand...
Click to collapse
If you just flash the new nightly (and I'd reflash the gapps too) you don't need to wipe anything and you won't loose ant data
Sent from my Nexus 4 running Android 4.3
mihahn said:
If you just flash the new nightly (and I'd reflash the gapps too) you don't need to wipe anything and you won't loose ant data
Sent from my Nexus 4 running Android 4.3
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Click to collapse
Ok cool. I have couple of questions if you don't mind.
What do I flash first? ROM or GAPPS?
I heared some nightlies have issues, is there somewhere I can look to find them?
Will I need to reflash Franco Kernel?
thanks
ZaViX said:
Ok cool. I have couple of questions if you don't mind.
What do I flash first? ROM or GAPPS?
I heared some nightlies have issues, is there somewhere I can look to find them?
Will I need to reflash Franco Kernel?
thanks
Click to expand...
Click to collapse
1. flash rom and then gapps
2.The latest nightlies dont have much BOTHERING issues..
3. yes,if you flash a rom. not sure though..
Press thanks if I hepled you .

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