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[Q] Changing kernel after rom installation

Hello, although I've installed some rom's till now i'm still not sure:
I've installed Dorimanx latest rom (3.0.6) with his kernel, and I really liked it. But for some reason got a wifi Error, seen on forum it's a knows issue and that changing kernel might solve the problem.
downloaded hierOS kernel and now i'd like to install it. could I install it from cwm without reinstalling my rom? according to some threads it's possible but it just doesn't make any sense to me because it's on a lower layer.. thanks

please?
no one knows? or maybe i got it all wrong?

Just follow the instructions in the kernel thread. You may have to replace the initrd.gz file but there is no need to fresh install.

Nigeldg said:
Just follow the instructions in the kernel thread. You may have to replace the initrd.gz file but there is no need to fresh install.
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Sure, read it. but it won't guide for installing after rom is already running, but only for normal mode. And I'd like to go to cwm and run zip of the new kernel, [again, rom is already installed, not coz im lazy to reinstall rom, mostly out of curiocity]. thanks again

HierOS kernel is supposed to be for SENSE builds, so I don´t recommend using it with CM build. There are better options. Tytung, older DM kernels, new 2.6.35 bases etc. You just download zip, copy initrd.gz of your ROM if needed and flash via recovery as ROM. It won´t overwrite your data. You should wipe cache and dalvik too

zbeky said:
HierOS kernel is supposed to be for SENSE builds, so I don´t recommend using it with CM build. There are better options. Tytung, older DM kernels, new 2.6.35 bases etc. You just download zip, copy initrd.gz of your ROM if needed and flash via recovery as ROM. It won´t overwrite your data. You should wipe cache and dalvik too
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Thanks, I'll go on tytung. according to his instructions I should just delete initrd.gz b4 installing. and I will also wipe cache and Dalvik. But shall I "format system" as i saw on other thread? or wipe data?

banay said:
Thanks, I'll go on tytung. according to his instructions I should just delete initrd.gz b4 installing. and I will also wipe cache and Dalvik. But shall I "format system" as i saw on other thread? or wipe data?
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Just wiping cache and Dalvik cache will suffice, unless you need to wipe your current rom....Wiping system or data clears all files from those partitions, resulting in a loss of files the rom needs to function.

Well I think I've succeded, thanks. But I still have that Wi-Fi Error. so i guese changing kernel just won't do.. or shall i try DM older Kernel?

Factory Reset

In my small small experience, All Stock Roms (as listed by dr.ketan, somewhere else in this forum) after flashing thru PCOdin are safe for Factory Reset/Wipe data and Wipe Cache Partition. Only after that Abyss Kernel should be flashed. However after flashing leaked ICS Roms thru CWM should not be Factory Res/Wipe Data and Wipe Cache Partition. Please correct me whatsoever, if am wrong and suggest. Thanks.

dsmas said:
In my small small experience, All Stock Roms (as listed by dr.ketan, somewhere else in this forum) after flashing thru PCOdin are safe for Factory Reset/Wipe data and Wipe Cache Partition. Only after that Abyss Kernel should be flashed. However after flashing leaked ICS Roms thru CWM should not be Factory Res/Wipe Data and Wipe Cache Partition. Please correct me whatsoever, if am wrong and suggest. Thanks.
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You can "Factory Res/Wipe Data and Wipe Cache Partition." on ICS ROMS if you first flash the abyss kernel. DON'T EVER factory reset/wipe on stock kernels.
Also why would you flash leaked ics roms when Samsung released OFFICIAL roms?

wiping on Stock ICS kernel can be fatal to your phone ,be very careful ,flash the latest franco kernel ,or speed mode kernel as they are safe to wipe from and can function perfectly with ICS ROMs from samsung.

MR.change said:
wiping on Stock ICS kernel can be fatal to your phone ,be very careful ,flash the latest franco kernel ,or speed mode kernel as they are safe to wipe from and can function perfectly with ICS ROMs from samsung.
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So on franco's kernel we can wipe, backup, restore, etc as we normally would using cwm?

I think after rooting, No Factory reset. By the way what is the thump rule? When to Factory reset and when we should not?

There's no rule as such.
Use safe kernel and do whatever you please, just make sure you are on safe kernel when you play with recovery.

Att.Fan1982 said:
So on franco's kernel we can wipe, backup, restore, etc as we normally would using cwm?
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on latest franco and speed mode kernel ,and pretty much any kernel that has MMC_CAP_ERASE disabled ,it's safe to do what ever you want
just make sure you are on such a safe kernel first ,people have bricked because they thought they were on a safe kernel when in fact they weren't.
dsmas said:
I think after rooting, No Factory reset. By the way what is the thump rule? When to Factory reset and when we should not?
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thumb rule is to be on a safe kernel ,and then do what ever you want.

[Q] F2FS question

I'm sorry if this has been asked, but I have looked and am not able to post in the developer thread yet. I've got everything up and running on my N7 with f2fs, but I'm curious now if I update my ROM do I have to go through all the steps again? Do I always need to format data at the end and lose everything? Should I be using titanium backup to solve this? Hopefully someone can help me out.

waywardsojourner said:
I'm sorry if this has been asked, but I have looked and am not able to post in the developer thread yet. I've got everything up and running on my N7 with f2fs, but I'm curious now if I update my ROM do I have to go through all the steps again? Do I always need to format data at the end and lose everything? Should I be using titanium backup to solve this? Hopefully someone can help me out.
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If everything is up and running on F2FS already, you can flash and restore titanium backups as normal. You just now have to make sure the ROM and/or kernel you're flashing supports F2FS or has been converted to support F2FS.

PrizmaticSmoke said:
If everything is up and running on F2FS already, you can flash and restore titanium backups as normal. You just now have to make sure the ROM and/or kernel you're flashing supports F2FS or has been converted to support F2F2.
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Thanks for the info!

PrizmaticSmoke said:
If everything is up and running on F2FS already, you can flash and restore titanium backups as normal. You just now have to make sure the ROM and/or kernel you're flashing supports F2FS or has been converted to support F2FS.
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I am already on Carbon Rom All-F2FS, should I switch to another F2FS rom, what wipes are necessary? And should I format my tab again to all F2FS?

Leonhan said:
I am already on Carbon Rom All-F2FS, should I switch to another F2FS rom, what wipes are necessary? And should I format my tab again to all F2FS?
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Just do a normal clean flash like you would if you were still on ext4. No need to reformat. That's how i switched to Carbon. As far as nightlies on Carbon (or others), just dirty flash them. I've had no problems doing that.

My attempt to convert a XT1033 converted to GPe to F2FS.

Hello folks,
Well, we all know that the stock Moto G filesystem is F2FS. But surprisingly, the Moto G GPe has a native Ext4 support. Since F2FS is supposed to have about a 30% better performance, I decided to try out the convert to F2FS feature in Philz recovery. So I formatted my system and cache to F2FS (since it didn't give me an option to wipe data and data/media to convert) and flashed a ROM. Currently, I seem to be facing a bootloop.
Anyway, has anyone else tried something like this? If yes, then please share your experience here.
Cheers.

It would be great if that would be possible,then you could jump from retail stock to GPe more easly. I have an XT1032 stock rom and i'd really like GPe,but my concerns are that would i be able to stock XT1032 again from GPe? You know,for F2FS and if i wanted to flash custom roms again to have better support. Any thoughts on my question? And look the first post,this is really interesting since if you'd want custom roms and you are on GPe,you wouldnt need to flash stock ROM to avoid bugs with custom roms and GPe

TWRP also include a format to f2fs <-> ext4 option:
Add GUI option to change or repair file systems on individual partitions. The change is destructive so backup your data including internal sdcard first. This option should make it a little easier to migrate a device from ext4 -> f2fs, for instance. You will find this option under Wipe -> Advanced Wipe, then select only one partition and then press the Repair or Change File System button. If a developer has added f2fs support for your device and we don't have it in TWRP, please contact me via PM to arrange for it to be added.
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http://teamw.in/project/twrp2​
Wipe > Advanced Wipe > <Select Partition> > Repair or Change File System > Change File System
I will test this out tomorrow when I have some time.

U need a kernel support somewhat like this in nexus 5 for f2fs
http://forum.xda-developers.com/google-nexus-5/orig-development/nexus-5-f2fs-t2668486

Stock kernel supports f2fs, GPE kernel does not. Development of a GPE kernel that supported f2fs would be ideal, assuming the GPE stock ROM also functions correctly with a f2fs formated USERDATA partition.

Has anyone even tried to flash boot.img from stock,and then converting in philz?

DeHuMaNiZeD said:
Has anyone even tried to flash boot.img from stock,and then converting in philz?
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/boot/ (kernel+ramdisk) does not need to be formatted. Flashing boot.img before or after wouldn't make any difference.

lost101 said:
/boot/ (kernel+ramdisk) does not need to be formatted. Flashing boot.img before or after wouldn't make any difference.
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Well, I tried using TWRP, but it ended converting my phone back to dual sim.
Sent from my Moto G using XDA Premium 4 mobile app

Using TWRP to reformat 'data' from f2fs to ext4 wipes SDCARD and didn't even change the format. Right now it appears if you plan on moving between GPE and non-GPE and possibly back again, keep a full firmware image for both.
EDIT: Actually it appears TWRP did format correctly. But the GPE kernel can't get past the Bootloader. Perhaps there are other partition table differences.
After another try..the following works fine.
Migrate to GPE:
1) In TWRP, wipe, and format 'Data' from f2fs to ext4 (this will wipe internal storage.)
2) Sideload / adb push GPE ROM or flash ROM and Kernel via fastboot.
3) Reboot​
Return to Motorola Stock:
1) In TWRP, wipe, and format 'Data' from ext4 to f2fs (this will wipe internal storage.)
2) Sideload / adb push Stock ROM or flash ROM and Kernel via fastboot.
3) Reboot​

rudi_j7 said:
Well, I tried using TWRP, but it ended converting my phone back to dual sim.
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I re-read your OP. The GPE Kernel expects the 'userdata' partition to be ext4. Unless someone develops a custom kernel to support it; you will never be able to run the GPE ROM with an f2fs 'userdata.'

Because you set all partitions to F2FS. Only need to change /data to F2FS. Leave system and cache ext4. You would need a ROM with a patched fstab and then a kernel supporting f2fs for system and cache to be in F2FS as well. Plus major benefit is in /data, not system and cache. I tested full F2FS on my N4 and it was more a pain with less gain. /data is all that should be F2FS.
Sent from my Moto G using Tapatalk

You can get it by deleting the partition / data and change it later by f2fs with TWRP fastboot erase boot partition and flash the boot.img from the stock 4.4.4 rom motorola everything from GPE and I have it so it shows more fluid

F2FS Compatible??

Greetings;
Would anyone know if there is a F2FS compatible Custom Rom for N6P?
Thank you.

There is a custom ROM which supports F2FS, but AFAIK there is no way to format the system and data partitions to F2FS. Hopefully one day TWRP will support native F2FS formatting.
samteeee said:
Greetings;
Would anyone know if there is a F2FS compatible Custom Rom for N6P?
Thank you.
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ripv2 said:
There is a custom ROM which supports F2FS, but AFAIK there is no way to format the system and data partitions to F2FS. Hopefully one day TWRP will support native F2FS formatting.
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A custom TWRP was released today for this....
http://forum.xda-developers.com/showthread.php?p=65193930

Batfink33 said:
A custom TWRP was released today for this....
http://forum.xda-developers.com/showthread.php?p=65193930
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Merci.........

So twrp gives error trying to change cache to f2fs. Also, system gets rewritten to ext4 when you flash. Data will stay at f2fs though.