Develop Bugs

[Q] A few simple questions..

1. I have the 5.0 Juggernaut ROM, what's the difference between kernel and ROM? How do you choose your kernel?
2. What's the best battery saving ROM and kernel that has all features of the T898?

MarsHD2 said:
1. I have the 5.0 Juggernaut ROM, what's the difference between kernel and ROM? How do you choose your kernel?
2. What's the best battery saving ROM and kernel that has all features of the T898?
Click to expand...
Click to collapse
1. ROM is like the looks and all the little extra stuff of a car. Some devs may decide to put some aftermarket parts on it to make it look cooler, and function differently.
(overall looks and the stuff you use everyday)
KERNEL is like the ENGINE and ECU component of the car, it controls how the car functions.. the smoothness, the strength, the clockspeed. There are plenty of v6 engines in the world, but do they all work the same? nope. Some are tweaked to work best for certain CARS/ROMS.
(OMGAH ROM SO SMOOF SUBER BADDERY LIFE... KERNEL)
well thats the basic breakdown of it.
2. Each device works is different... some kernels/ROMs combo works differently on each phone...
But I have to say.. the devs we have here are all top-notched devs.. you can't go wrong following any of them. USUALLY the devs will leave all the features that are widely used by people and add other perks to the ROMs... sooo Just go flash crazy..
remember kernels and battery life needs a couple days to calibrate with one another.
BTW I find it useful to just stick with one or two devs you can devote your phone to, and just use their stuff.

[Q] Galaxy Nexus: Kernel and ROM

Hello xda-developers.
My name's Mirko and I from Italy. It's my first time that I post in this beautiful forum of all kind of developers
I have Galaxy Nexus (GSM. Italian version) with Android 4.1.1 stock. My small questions are:
- I suffer from short battery life, it's better change kernel or ROM?
- If it's better change kernel, what you can recommend to me and why?
- If it's better change ROM, what you can recommend to me and why?
At the moment only these are my questions.
Thanks for all answer.. It's my first time that I unlock bootloader and root my device (I have to do it), and I'm a full newbie of modding
Thanks thanks and thanks, this forum is the best.. Keep on the fantastic work and congratulation to all modder, staff and all!
P.s. sorry for my bad english
Best Regards.
- Mirko Pizii

Before you do any of the stated you need to find out weather your phone is gsm or cdma because you CANNOT put a CDMA on a GSM phone or the other way around.
Kernels affect battery life. I recommend Franco kernel or Lean kernel
Roms affect user interface (the OS operating System on the phone) - I recommend for a starting stable rom Cyanogen (its what MOST roms are based off of) then if you want to tweak your phone more I recommend CodeNamedDroid or ParanoidAndroid. (these are the three that I use the most)
also i would recommend this thread about battery life http://forum.xda-developers.com/showthread.php?t=1599025
i hope my english has not confused you. Dont be surprised if noone else responds to you in this page, they have a bad habit of doing this.

Weapondrift said:
Before you do any of the stated you need to find out weather your phone is gsm or cdma because you CANNOT put a CDMA on a GSM phone or the other way around.
Kernels affect battery life. I recommend Franco kernel or Lean kernel
Roms affect user interface (the OS operating System on the phone) - I recommend for a starting stable rom Cyanogen (its what MOST roms are based off of) then if you want to tweak your phone more I recommend CodeNamedDroid or ParanoidAndroid. (these are the three that I use the most)
also i would recommend this thread about battery life http://forum.xda-developers.com/showthread.php?t=1599025
i hope my english has not confused you. Dont be surprised if noone else responds to you in this page, they have a bad habit of doing this.
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Click to collapse
Hey Weapondrift, I realize that maybe my Galaxy Nexus is GSM.
I give a watch to Franco kernel or Lean kernel but all say it's better both.. Don't know what the difference before start my first flash.
Thanks for roms..
What do you think? It's ok only kernel or it's better change rom?
Thanks for battery life thread, I'll follow
No no, your english won't confuse me.. I can understand but I have problem with speak to other
Oh.. Really they have this bad habit?
Thanks for you answer, friend
Best Regards.
- Mirko Pizii

Franco's has horrible battery life...
paranoidandroid with trinity is the best imo

Yes, custom kernels can improve battery life if you're willing to trade in a little performance. Can't have both at the same time.
Sent from my Galaxy Nexus using Tapatalk 2

Petrovski80 said:
Yes, custom kernels can improve battery life if you're willing to trade in a little performance. Can't have both at the same time.
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
I beg to differ..
I find trinity performs just as good and adds like 2 hours screen on time

crixley said:
I beg to differ..
I find trinity performs just as good and adds like 2 hours screen on time
Click to expand...
Click to collapse
You may of course. I'm not convinced though.
Sent from my Galaxy Nexus using Tapatalk 2

[Q] best GSM rom ?

Hi Guys , I was running stock ROM on my nexus , but was irritated cuz the lack of some toggles like auto rotation and data on/off so i decided to get custom ROM.
So i tried few but either they're buggy or the battery runs out too quickly ...
So my question to you guys is: what's the best ROM whit best performance and battery ?

Performance will always come at a cost.
Sent from my i9250

always has and always will...
So what are you suggesting ?
I was thinking of trying CM whit Franco kernel ...

there is no best, they are all good. they all are about equal in battery and performance. best is what fits your needs. everyone will always post what they are currently using as the best, no one wants to say they use the worst.

simms22 said:
there is no best, they are all good. they all are about equal in battery and performance. best is what fits needs. everyone will always post what they are currently using as the best, no one wants to say they use the worst.
Click to expand...
Click to collapse
+1
Bottom line is it comes down to the developer. How much customization.... How much Bloat... How minimal (generally smooth and buttery)... and etc. Flash them all

[Q] Battery life: stock VS custom roms and remedies

Hi guys!
I've been playing around with my GNex (GSM, stock 1750mAh battery) since last july and my biggest concern is (still) the battery life.
I've noticed that the couple stock rom + stock kernel (the ones the phone come with) is much better than any other custom rom+kernel.
Here comes my (maybe stupid) question: is the battery life somewhat related to the (de)odexed status of the rom?
I mean, I've been looking for all kinds of solutions to take advantage of those features offered by AOKP or PA without suffering from BL issues, but I find silly to sacrifice stability/smoothness/responsiveness/always-on-connection/brightness/whatsoever to gain not that many mins of juice. And I really wonder what is the sourcery Google adopts to make its roms so stable, responsive and battery friendly (e.g. no custom rom/kernel can achieve as much BL as the stock ones). Put differently, with the stock rom/kernel, I can leave 3G always on, auto-sync always on, haptic feedbacks on, location services always on (but GPS) and the battery survives for more than 24h; while, with custom roms/kernels, I could switch everything in the list off and still the battery wouldn't last that long (ceteris paribus).
Could you, please, explain me how it works?
Is there really no way to improve BL other than those listed above?
And, finally, does odexing the system apps (on custom roms) do the trick?
Cheers!
P.s.: the answers I'm looking for may already be in other threads.
If so, I apologize, but I tried googling different keywords many times, and got no interesting results.

For me the biggest source of battery drain is the screen by far. Maybe you enjoy custom ROMs more than the stock one and you keep the screen on more I would think that a custom ROM would be more battery friendly. Which ROMs have you tried?

Endriu90 said:
Hi guys!
I've been playing around with my GNex (GSM, stock 1750mAh battery) since last july and my biggest concern is (still) the battery life.
I've noticed that the couple stock rom + stock kernel (the ones the phone come with) is much better than any other custom rom+kernel.
Here comes my (maybe stupid) question: is the battery life somewhat related to the (de)odexed status of the rom?
I mean, I've been looking for all kinds of solutions to take advantage of those features offered by AOKP or PA without suffering from BL issues, but I find silly to sacrifice stability/smoothness/responsiveness/always-on-connection/brightness/whatsoever to gain not that many mins of juice. And I really wonder what is the sourcery Google adopts to make its roms so stable, responsive and battery friendly (e.g. no custom rom/kernel can achieve as much BL as the stock ones). Put differently, with the stock rom/kernel, I can leave 3G always on, auto-sync always on, haptic feedbacks on, location services always on (but GPS) and the battery survives for more than 24h; while, with custom roms/kernels, I could switch everything in the list off and still the battery wouldn't last that long (ceteris paribus).
Could you, please, explain me how it works?
Is there really no way to improve BL other than those listed above?
And, finally, does odexing the system apps (on custom roms) do the trick?
Cheers!
P.s.: the answers I'm looking for may already be in other threads.
If so, I apologize, but I tried googling different keywords many times, and got no interesting results.
Click to expand...
Click to collapse
Thats strange, to me battery life is better with custom ROMs and kernels

R: [Q] Battery life: stock VS custom roms and remedies
sirxdroid said:
For me the biggest source of battery drain is the screen by far. Maybe you enjoy custom ROMs more than the stock one and you keep the screen on more I would think that a custom ROM would be more battery friendly. Which ROMs have you tried?
Click to expand...
Click to collapse
Lol, maybe you're right!
Until now, I tried AOKP and PA roms and franco, AirKernel, GlaDOS and stock kernels (all possible combinations). I found that PA and GlaDOS are the best custom couple, but still not comparable with the factory ones.
However, even tough I have no technical numbers, the usage on custom stuff had been more or less the same as on stock things (although I became a pie-control addict). And what I know for sure, the BL gap is mostly due to screen (i.e. by staring at the launcher home screen for 5 minutes, the battery drains faster with custom roms than with stock roms - still, ceteris paribus).
NexusS4gFreak said:
Thats strange, to me battery life is better with custom ROMs and kernels
Click to expand...
Click to collapse
I know that's strange. Things used to work as you say with my HTC Desire. But since I've switched to the Nexus S (and then to the GNex), I strongly preferred stock stuff just because of battery life
Sent from my stockish Galaxy Nexus using xda app

[Q] Fastest thing in Galaxy Nexus

Hi!
Do you know what ROM is the fastest (with better performance) for our Nexus? I don't care if it is Stock or Custom, all I want is the better performance/battery life rom possible.
I am now with CM11 unoficial by playfulgod and I like it because it is 4.4, but the phone takes too long to open the apps and lags a little bit in fast transactions....
EDIT: I also don't care about the version, 4.4, 4.3, 4.2, 4.1, anything... the changes are minimal from 4.1 to 4.3 and 4.4 has its pros and cons

Flash and find out. Thats your best option.

Edit: Wrong section. Sorry. How the h*ll did i end up in Galaxy Nexus section.

I'm using CM official nightlies and find it quite good. I found 4.3 faster but like others have said it's a case of trying different rom / kernel combinations. What works well for me night not be much good for you and vice versa. A lot of different factors come into play. Apps used, background apps etc.
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Sent from my Galaxy Nexus using XDA Premium 4 mobile app

badboy47 said:
I am using N5 Port with Franco Kernel. Its very fast with great battery life. Every kernel has its own pros and cons. Try different kernels.
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Click to collapse
YOU ARE POINTING HIM TO A NEXUS 4 ROM! :banghead:
Sent from Samsung Galaxy S Relay 4G @ CM11

all roms give the fastest and good performance.. its all depend on you.
so far after 1 week experiments.
i use gnex + extended battery + slimkat 4.4.1 + A.S.K.P kernel + odexed + run perfomance scripts + tweak build prop = superb. already 4 hour screen on... with over 50% balance battery..
galaxy nexus i9250

I have just flashed Gummy's 4.4 rom just trying it out from BelieveRom. I was looking for something faster with some of the new features and this had most of them. Real smooth so far with steady battery use on stock kernel. Will try some other kernels to see if it will add the butter.

I'm running swordrune10's cm11 its pretty good

memaro_maro said:
all roms give the fastest and good performance.. its all depend on you.
so far after 1 week experiments.
i use gnex + extended battery + slimkat 4.4.1 + A.S.K.P kernel + odexed + run perfomance scripts + tweak build prop = superb. already 4 hour screen on... with over 50% balance battery..
galaxy nexus i9250
Click to expand...
Click to collapse
Care to lay out all the tweaked build prop, performance scripts? How big is this extended battery? Is it the one from Verizon that Samsung made or is it one of those big 3,000+ sized ones that makes the phone super thick? seeing 4 hours of screen on time and only half battery used seems too good to be true.

thanks guys!
I will try a few roms here and give you the feedback later

The performance were only good on 4.1.2

dsummitt said:
Care to lay out all the tweaked build prop, performance scripts? How big is this extended battery? Is it the one from Verizon that Samsung made or is it one of those big 3,000+ sized ones that makes the phone super thick? seeing 4 hours of screen on time and only half battery used seems too good to be true.
Click to expand...
Click to collapse
im use the super big extended battery.. 4000 mah.. its big but worth it.
i dont like to use power bank as alternative.
im using pure performance™ scripts.. but carefull in scripting, it may cause overwrite the existing build.prop.
additional of using performance control. apk> download from fdroid repo. its seem to be easy to use for tweaking ram performance. especially for noob likes me.
sorry for my bad english..
galaxy nexus i9250

Thats pretty nice. It seems way big for me though. I'm not a make the phones a slim as you can kind of person, but i do like a happy medium.

Vanir is pretty smooth and fast. Battery isn't greatest but performance kicks ass on my toro. 4.4 flies but still has black boxes

Yes, Vanir is very smooth. But the most important is to install custom kernel. For now the best are ASKP and Mpokang SuperRAM. If you install one of these kernels, i think every ROM will be smooth.
I suggest to try MetalOmni - very fast 4.4 ROM.

ITS ALL YOUR OPINION. FLASH AND FIND OUT. These threads arent even allowed. And on top of that: how would you feel if you had put alot of effort into making a ROM and people dont like it because its "slow". Just try and find out seriously. Youre maybe the 100th with this thread. This will probably be closed in a couple of days.
Sent from my Galaxy Nexus using XDA Premium HD app

well, then I will have to flash all the roms there are to see for myself which one is the best in terms of speed. considering that there are at least 5 different roms just for 4.4 and for 4.3 (and previous) there are much more roms... I would need to flash about 20 roms (or more) and test them at least a day or two to see which ones are better... By my calculations, I will need at least 1 month. Considering that android isn't my life, I have many other things more important to do, I will spend more than a month doing that testing thing...
So, do you really think I can test them all for myself? Shouldn't I ask here for names of the best roms in terms of speed that many members have tested? This way I will only test the 3/4 most mentioned, not the all 20. I know that the developers do a lot of work in their roms, but there are ones better than others for many things, I don't think the developer of rom X would mind if I prefer the rom Y from other developer because it is faster. Maybe the rom X has more options and other things, but lacks in speed, so the developer of rom X isn't interested in making a rom for speed, it isn't inferior to the other rom, just different.
If this thread is locked, even finding it unfair and kind of stupid, I don't really care. I already got a few opinions and I'm testing some roms here. Thanks a lot for the ones who helped me and aswered this thread.

Rayaxe said:
well, then I will have to flash all the roms there are to see for myself which one is the best in terms of speed. considering that there are at least 5 different roms just for 4.4 and for 4.3 (and previous) there are much more roms... I would need to flash about 20 roms (or more) and test them at least a day or two to see which ones are better... By my calculations, I will need at least 1 month. Considering that android isn't my life, I have many other things more important to do, I will spend more than a month doing that testing thing...
So, do you really think I can test them all for myself? Shouldn't I ask here for names of the best roms in terms of speed that many members have tested? This way I will only test the 3/4 most mentioned, not the all 20. I know that the developers do a lot of work in their roms, but there are ones better than others for many things, I don't think the developer of rom X would mind if I prefer the rom Y from other developer because it is faster. Maybe the rom X has more options and other things, but lacks in speed, so the developer of rom X isn't interested in making a rom for speed, it isn't inferior to the other rom, just different.
If this thread is locked, even finding it unfair and kind of stupid, I don't really care. I already got a few opinions and I'm testing some roms here. Thanks a lot for the ones who helped me and aswered this thread.
Click to expand...
Click to collapse
You want the fastest and super smooth? OmniMetal (ROM come with Mpokang kernel). You will be happy and let me know how it works out..
http://forum.xda-developers.com/showthread.php?t=2532320

Gummy AOSP 4.4 ROM with Mpokang kernel SuperRam!
The fastest of all. Mpokang kernel is miles ahead of other kernels. Most RAM and fastest performer!

antypas said:
Gummy AOSP 4.4 ROM with Mpokang kernel SuperRam!
The fastest of all. Mpokang kernel is miles ahead of other kernels. Most RAM and fastest performer!
Click to expand...
Click to collapse
Well, you got me curious.
I am currently testing SlimKat ROM and it looks fast enough for me.
Unfortunaly, it's still on beta (4.4 KitKat), so you might expect a few bugs.
Still, it's a good ROM, in my opinion.