So...my previous phone was motorola razr maxx xt910 with locked bootloader.
And there was nice app - bootmenumanager or safestrap, which allowed following:
have multiple virtual roms, and stock rom.
So when i had installed stock rom, with stock kernel i could also boot cm based rom which required own, cm kernel.
It was done by kexec.
Is it possible to have stock rom, with stock kernel, and as second system cm based, aosp rom like fusion or blisspop with own kernel witout needing to flash kernel on every boot?
Sorry for the noob questions. I just don't want to mess it up.
I plan to root shortly. I've watched a few YT vids, so I'm confident about doing that.
I'd like to about the order of doing things, if that makes sense.
At the moment, I've not downloaded the OTA firmware updates, so it's basic KK 4.4.4. But, I downloaded via SamMobile, the latest KK ROM (N910FXXU1ANK4_N910FBTU1ANK2_BTU)
Am I correct in thinking, I should reformat the phone (I've got nothing on the phone I want to keep), install the ROM from SamMobile via Odin (to be fully up to date with KK), then root and install TWRP, create a backup.
Then I'm free to install any custom ROMs, update to Lp?
Speaking of custom ROMs, at the moment I'd prefer to stick with KK, until Xposed is sorted and is easy to install when using Lp.
Without trying all the custom ROMs out there, do any support the fingerprint scanner, S Pen, Multi Window, S Health and the HRM or would I loose some/all of those features?
If in the future I upgrade to Lp, is it necessary to download/flash the latest stock ROM (to get the latest FW updates/fixes/security patches etc), before I installed a custom Lp ROM?
Thank you for any help and advice
Does anyone have any answers, before I try it and blow up my phone in a massive fireball?
You're pretty much such right on the above steps. Some (me included) prefer Phils CWR rather than TWRP as a custom recovery. Fair enough to stick with KK, but LP working ok with Xposed now, assuming you're using a custom rom. There are two distinct types of custom ROMs. Those based on touchwiz and those that aren't. The ones based on TW will be called things like BOD2 or BOE2 for LP or ANK2 for KK (like the one you pasted above). Other ROMs will be based on AOSP. The TW ones will work with the s-pen, fingerprint etc. The AOSP ones won't. You can go straight to LP custom from KK, you don't need to flash via a stock LP ROM but it doesn't harm to do so. The custom ROM installation instruction will often provide you with an extra bootloader/modem file to flash if you are coming from KK or a different version of LP. Stock ROMS do include bootloader and modem, custom ROMs generally don't.
Good luck
EyeTech said:
You're pretty much such right on the above steps. Some (me included) prefer Phils CWR rather than TWRP as a custom recovery. Fair enough to stick with KK, but LP working ok with Xposed now, assuming you're using a custom rom. There are two distinct types of custom ROMs. Those based on touchwiz and those that aren't. The ones based on TW will be called things like BOD2 or BOE2 for LP or ANK2 for KK (like the one you pasted above). Other ROMs will be based on AOSP. The TW ones will work with the s-pen, fingerprint etc. The AOSP ones won't. You can go straight to LP custom from KK, you don't need to flash via a stock LP ROM but it doesn't harm to do so. The custom ROM installation instruction will often provide you with an extra bootloader/modem file to flash if you are coming from KK or a different version of LP. Stock ROMS do include bootloader and modem, custom ROMs generally don't.
Good luck
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Thank you very much, that's been a great help Respect to the People's Republik of Mancunian :good:
A TW ROM sounds the best option for me at this time.
A few more Q's if you don't mind (or anyone else).
1. Is it worth installing a pre rooted stock ROM (for the 910F), so I can get any possible OTA updates (KK or Lp) or is it nothing to worry about?
I'm not sure if any exist at the moment for the 910F?
2. Is it best to just install 910F based ROMs? (I'm thinking about the telephone side of things, connecting to UK carriers)?
Thank you.
0-0-0 said:
Thank you very much, that's been a great help Respect to the People's Republik of Mancunian :good:
A TW ROM sounds the best option for me at this time.
A few more Q's if you don't mind (or anyone else).
1. Is it worth installing a pre rooted stock ROM (for the 910F), so I can get any possible OTA updates (KK or Lp) or is it nothing to worry about?
I'm not sure if any exist at the moment for the 910F?
2. Is it best to just install 910F based ROMs? (I'm thinking about the telephone side of things, connecting to UK carriers)?
Thank you.
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Click to collapse
No prob. Yeah. I agree - go for a TW ROM. As for your questions:
1. No. OTA updates just take you from one stock ROM to next version of the stock ROM. OTA updates don't work well, usually failing, once you have rooted and maybe installed custom recovery. You can easily stay up to date without OTAs by just re-flashing with a new custom or stock ROM release. For me, the only reason to use a custom rom at present is to use Xposed (mostly to change DPI for different apps and also to add the symbols on the stock keyboard, oh and also to run a non-ads environment). If I was staying on KK I would have stayed on stock, rooted and then installed a custom recovery and Xposed. Currently Xposed is only compatible on the Note 4 with Lollipop if you are using a deodexed (custom) rom. All stock ROMs are ODEXED, and hence not compatible with Xposed (for now).
2. Yes. Stay away from ROMs for other variants (like the 910G). They're not compatible.
When you pick a ROM, ask questions in the ROM thread. It will be more read than these Q&A areas.
EyeTech said:
No prob. Yeah. I agree - go for a TW ROM. As for your questions:
1. No. OTA updates just take you from one stock ROM to next version of the stock ROM. OTA updates don't work well, usually failing, once you have rooted and maybe installed custom recovery. You can easily stay up to date without OTAs by just re-flashing with a new custom or stock ROM release. For me, the only reason to use a custom rom at present is to use Xposed (mostly to change DPI for different apps and also to add the symbols on the stock keyboard, oh and also to run a non-ads environment). If I was staying on KK I would have stayed on stock, rooted and then installed a custom recovery and Xposed. Currently Xposed is only compatible on the Note 4 with Lollipop if you are using a deodexed (custom) rom. All stock ROMs are ODEXED, and hence not compatible with Xposed (for now).
2. Yes. Stay away from ROMs for other variants (like the 910G). They're not compatible.
When you pick a ROM, ask questions in the ROM thread. It will be more read than these Q&A areas.
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Thank you again, I appreciate the help
Hi everyone
I have a rooted stock Galaxy S4 I9505 (4.4.2) and TWRP installed. For the last few weeks, my phone had a lot of kernel wakelocks which I couldn't stop. This could be fixed by installing a new kernel, right? I wanted to try that anyway.
I think I read the relevant FAQs, but this is my first time flashing a kernel, so just to be sure I have a few questions:
Does anyone have experience with the KT-GSG4 kernel? Do all custom kernels have the basic functions of stock kernels (plus some features), or will I lose some functionality?
Can I just flash the kernel, without changing the stock rom and keeping my files/settings etc.? If I do something wrong, can I just restore via nandroid backup?
Do I just have to go into TWRP recovery, click install, choose the kernel zip file, install it, wipe caches and reboot?
Thanks a lot!
Ktoonsez is a great kernel dev. So the kernel should be fine.
A custom kernel generally offers more customizability. I don't know what features you might from stock kernel you might lose.
If the kernel is for touchwiz, then you can probably flash it on a touchwiz rom. Just make sure it is for the same android version.
I haven't flashed any kernels on a stock touchwiz rom so I can't tell you the flash procedure. It may be different from custom roms due to knox and other stuff.
I have tried several custom TW roms already but I'm still not that quite satisfied. There are those who are heavily debloated that some functions does not work anymore, and there are those that are so bloated... or whatever that does not matter.
I would like to flash custom kernel on stock rom to have more control on what i would like to add and remove.
I love ktoonsez SGS5 kernel. Sometimes I'm stuck on samsung boot animation, sometimes I'm stuck on Android is starting. I have wiped cache and data of course.
I would like to use the latest firmware BOJ1 or BOJ2. Is the cause related to bootloader? or anything? It seems that custom roms are using those that are a bit outdated as their base. I dunno, just a lucky guess.
Boeffla-Kernel
Worked fine on Stock TW for me
http://www.boeffla-kernel.de/index.php/downloads-samsung-phones
Samsung Galaxy S5 SM-G900F
Support: [email protected]
Note: If you are coming from a custom kernel to Boeffla, I recommend to flash the following cleaner script in recovery before you move on to Boeffla-Kernel:
>>> CLEANER SCRIPT FOR GALAXY S5
Boeffla-Kernel for Samsung Stock Android 5.0 Lollipop
Current test kernels
Stable kernels
Which kernels work on Lineageos? I'm interested in flashing vegito but I'm unclear if it works? It says to flash over only stock kernel, which lineageos doesn't have, but would it work if I flash stock kernel of lineageos first, then flash vegito?
lightningglasses said:
Which kernels work on Lineageos? I'm interested in flashing vegito but I'm unclear if it works? It says to flash over only stock kernel, which lineageos doesn't have, but would it work if I flash stock kernel of lineageos first, then flash vegito?
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ElementalX, vegito and quark kernels should work on Lineage OS without issue (though still check their respective pages!)
By flashing only over the stock kernel, the instructions usually mean only flash over the kernel that originally came with the ROM. I imagine it's a bit confusing given the Motorola ROM kernel is also regarded as the stock kernel, but in this case, the 'stock kernel' refers to whatever kernel the ROM you flashed came with. (As an aside, don't try to flash the Motorola kernels on custom ROMs...)
Lineage OS, as with other custom and stock (Motorola) ROMs come with their own kernel included, which you replace when you flash the custom kernel. A reason for requiring that you flash over the stock (originally coming with the ROM you've flashed) kernel only appears to be because custom kernels modify the ram disk of the kernel, which other custom kernels will be incompatible with and may lead to random issues. The stock (in this case, the original ROM kernel) is clean and has no modified ram disk, so should be stable, and thus suitable for flashing a custom kernel.
If you have the original Lineage OS kernel already, then you can flash vegito in TWRP. I'd recommend taking a TWRP backup of your system and of your boot partition before flashing. The boot partition should contain your kernel as it was, so if it's clean, you can revert back from vegito by flashing the boot partition backup. And the system backup is just in case anything happens!
Alternatively, a dirty flash of your current Lineage OS build may flash an original kernel if you don't have one already.