How To Tell If You Have Flashed the "RIGHT" Kernal - EVO 4G General

I am writing this to finally get some answers on which kernal is right for you're phone, when downloading a custom rom you are given the kernal the developer has choosen, well some people like to switch to a different kernal, the real question is what issues and what kind of things do you look for to tell if the kernal is right for your phone, for instance i understand if you're phone starts running really slow or laggy, or if your battery drops a whole wopping 50% in 2 hours of use, that you probably shouldnt be using that kernal, but what are some aspects you look at, as well as things that would make you want to switch to a different kernal, also how long do you leave the kernal installed before it settles in to check and see if its really right for you're phone? do you flash to a differnet kernal, because you notice some things are not right at the start of running your phone with the new kernal, Well does sense transition fast between screens? can the phone run many active widgets with a live wallpaper or even the weather animations from the clock running, and still cause no lag when unlocking the phone and watching the live wallpaper run with the weather? can the phone run multiple tasks without slowing down or having to wait for your phone to react? anything that pertains to the kernals ability to run on your phone, i'm sure many people would be happy to see what other do and what they look for when flashing a custom kernal.

Battery life.
Sent from my PC36100 using XDA App

Every other variable should be eliminated before blaming your kernal for poor battery life

Related

[Q] My new experiences with ROMs

Essentially I am just posting this to get my count up so that I can post in the development section.
I have been using the Droid 2 since October 2010. 9 months is the longest time I have ever kept the same model. Prior to that the longest was 1 to 3 months. Even though this phone doesn't work perfectly, the length of time I've been able to endure its use says a lot.
I had my device rooted within a few weeks of acquisition. When the GB leak came out, I had it instantly.
I am still kind of confused as to why I was too scared to install a custom rom. My first rom was Liberty GB .8 And naturally it was AMAZING and EASY. I love the liberty toolbox. My battery life was insane! So many configurations and options built in! I figured if one rom was this great, why not try more...I then tried the latest APEX rom. To me, that rom seemed a little slower than liberty, so I reverted to liberty immediately. Only one known bug presented itself, and that was the adjusting of volume with a bluetooth device, the call would end. After a few days of use, I decided to take the plunge to the almighty Cyanogenmod7...
The installation process was really easy. I already had the sbf files downloaded from switching to the newer rooted GB leak. After sbf'ing z4 root would not work, so I just used the easy one click pc method.
Installing nightly updates every morning probably isn't necessary but that's what I've been doing. I gotta say, I can't wait for a stable release of this rom. I think that this rom probably isn't for the average consumer, and to definitely experiment with something like Liberty first.
There are a few things that aren't quite up to par with this rom (which will be fixed with time I know). The camera app on this rom is actually not that bad. I have gotten used to it. But I can tell that when I have it set on 5MP, that the picture quality is not as good as the stock app. The flash is also not as bright, and I have seen a setting to tweak that, just need to get around to doing it.
With Liberty, I was honestly able to make it 36 hours without having to recharge my device, and was using it heavily (gps always on, bluetooth connected, navigating, phone calls, texting tons, etc). However, with cm7, even with sync off, bluetooth off, and brightness set to low, the battery seems to just fade away, even after re-calibrating it. And yes I am sure the fact that the battery percentage is in the notification bar, that being able to see each percent, might have a little to do with it. Even with the governor set at 600mhz, and profiles with setcpu, still crummy.
Anyway, I am thankful to no longer have problems with my keyboard backlight, and having the ability to use wireless tether, and netflix. (And I don't want to hear any negative remarks about it, because I constantly use wifi when I can, and I rarely reach 1GB of data use). My phone now runs FAST.
Alright, only 9 more posts like this to go.
So, overall, you would recommend Liberty above the others at this time?
If it came down to battery life as the biggest concern, by far, liberty. Its pretty darn fast too. But if you have an extended battery and are able to endure a few kinks for a short time, then try CM7.
Sent from my DROID2 using XDA App
Speaking of, I went back to Liberty! May go to 0.9 but the changes aren't that significant. It was nice to be able to cm7>LGB without sbf'ing!
Sent from my DROID2 using XDA App

[Q] noob with atrix on alien4

Hello, i just bought an atrix on ebay with alien4 and was wondering if i should stay with this rom or not? I have no mod experience on this phone. I would like to get better battery life and get rid of blur if possible. It might just have a weak battery, but it goes down fast when im not even using it. I believe it is unlocked bootloader. I dont want to go crazy, just like a nice setup thats fast and good on battery life. Thanks!!
Try the current rom out for a while, and then give CM7 a shot...
Sent from my GT-I9000 using xda premium
There are a few different choices. Definitely get comfortable first with flashing ROMs. Use the guides here in the forum to teach yourself how to do it. After reading the guides, read them again. You do not want to end up bricking your phone.
A few I myself have tried are CM7, HomeBase and Aura. I use HomeBase as my daily driver. My battery life has been pretty good. I usually get around 36 hours with pretty heavy usage of streaming music and videos.
wsison23 said:
There are a few different choices. Definitely get comfortable first with flashing ROMs. Use the guides here in the forum to teach yourself how to do it. After reading the guides, read them again. You do not want to end up bricking your phone.
A few I myself have tried are CM7, HomeBase and Aura. I use HomeBase as my daily driver. My battery life has been pretty good. I usually get around 36 hours with pretty heavy usage of streaming music and videos.
Click to expand...
Click to collapse
36 hours?? wow, mine was full 2 hours ago and its already down to 68% and i havent really done anything on it except going thru menus and settings and things??
You probably need to re calibrate your battery,
xploited's guide really helped my battery life out, try it
http://forum.xda-developers.com/showthread.php?t=1198333
foxrivertrekker said:
Hello, i just bought an atrix on ebay with alien4 and was wondering if i should stay with this rom or not? I have no mod experience on this phone. I would like to get better battery life and get rid of blur if possible. It might just have a weak battery, but it goes down fast when im not even using it. I believe it is unlocked bootloader. I dont want to go crazy, just like a nice setup thats fast and good on battery life. Thanks!!
Click to expand...
Click to collapse
im still useing alien v4 for me it just works best with my custom webtop
Sent from my MB860 using xda premium
I would give HomeBase a spin, but just remember that the de-blurred Moto ROM's do have certain things missing just have to read about whats there and see if you can live without it. I personally use HomeBase 2 which is slightly de-blurred and it looks and feels like a vanilla ROM. Some blur is good. Definitely read through a few posts and guides in the Development section to get a handle of whats going on and then start trying things out. I don't know what recovery you have but I would suggest first going to this link and learn a little:
http://forum.xda-developers.com/wiki/index.php?title=Motorola_Atrix_4G
Then going to this link to get the latest recovery (it will save you some headaches):
http://forum.xda-developers.com/showthread.php?t=1204500
As for the battery thing, try calibrating. If that doesn't work, it could need a battery with it being a used phone.
I tried Homebase and Aura a couple days ago, and I went back to Alien#4. Couldn't put my finger on why I didn't like them. But you should try all the ROMs you think you might like and see what works best for you.
I get really good battery with light-medium use, and my phone is very smooth. So if it helps, here's my setup:
Alien#4
Faux's OC Kernel 2.0 (to 1.3GHz)
Undervolted (75, 75, 75, 75, 100, 100, 100)
SetCPU "Screen Off" Profile to clock down to 456000Max
The biggest battery killer by far with that setup is the screen. There's a mod in the development forums that can lower the brightness much more than the stock minimum, but I haven't bothered with it. I only use my phone in quick bursts most of the time; check an email, send a text, etc. so it's not that big a problem for me. I can go couple days without needing a charge.
mvgc3 said:
I tried Homebase and Aura a couple days ago, and I went back to Alien#4. Couldn't put my finger on why I didn't like them. But you should try all the ROMs you think you might like and see what works best for you.
I get really good battery with light-medium use, and my phone is very smooth. So if it helps, here's my setup:
Alien#4
Faux's OC Kernel 2.0 (to 1.3GHz)
Undervolted (75, 75, 75, 75, 100, 100, 100)
SetCPU "Screen Off" Profile to clock down to 456000Max
The biggest battery killer by far with that setup is the screen. There's a mod in the development forums that can lower the brightness much more than the stock minimum, but I haven't bothered with it. I only use my phone in quick bursts most of the time; check an email, send a text, etc. so it's not that big a problem for me. I can go couple days without needing a charge.
Click to expand...
Click to collapse
im runnin alien v4 here is my batt info cence last charge currently 13%left im useing cpu master NOT set cpu
3profiles most inportant screen off
456mah max216-min fauxs v2.0 set to boot at 1200 mahmax
Sent from my MB860 using xda premium

[Q] Bulletproof ROM/Kernel Combo?

I love to play around with new ROMs and kernels and usually don't mind a few hiccups and occasional poor performance. But soon I will have a one week period where I need my phone to be as solid as possible. What's the best ROM/kernel for this?
I currently use CM7 as my daily and have tested CM9. CM7 is great except battery life is pretty bad, with both the CM7 and Samurai kernels. I lose about 1% of battery for every 90 secs I'm actively doing something - even on Wifi and with a strong 3g signal. A 15minute drive with GPS (and screen off) easily takes 10% off my battery. This is unacceptable for my upcoming event.
I would like a ROM/kernel combo that can go for a minimum of 12 hours with moderate use. No voice, but frequent texting, email, twitter checks, some photos, and calling up pdfs. Battery life and stability are the top concerns, but GPS is important as well. CM7 gives me the best GPS results I've ever had with my Epic, but like I said, the battery performance is awful.
Any ideas? Focusing on all the cutting edge stuff means I've lost touch with the latest improvements on the more basic, but more solid ROMs.
Thanks!
get a larger battery or pick up a spare oe battery as a backup.
this is one of those questions you just dont ask cause it all depends on how you use your phone and all that i know you say what you mostly use it for but it still doesnt help if you are looking for a stable rom as far as mtd goes they are all good and as far as kernels go they are all good but the kicker is just finding what works best for you feel free to play around with them flash one per day and figure out which one works best for you cause honestly we cant tell you cause what would extend our battery life might not work for you because you use your phone differently than we do but trust me all of our devs are gonna throw out something that doesnt work all the warnings are there and all the help and how to's for each rom and kernel are in their respective threads sorry i couldnt give you a better answer bud
happy flashing
Oh and I forgot to mention since you have been running cm7 make sure you don't flash a bml rom not sure if u were aware of that or not so only flash and MTD rom and kernel
CleanGB. No OC/UV, and buy an epic touch 1800mah battery. For me I get best responsiveness vs battery life if I run 100/800mhz with governer set to performance. You'd have to REALLY try to kill that battery in a day with this setup.
Edit: you use gps in the car without plugging it in? No wonder your battery commits suicide lol. If I use gps and stream music through bluetooth it still discharges on the charger.
There is no such thing. Even pure stock has errors on some people's phones. You need to try one or if it is that important than stock is your best bet. EVERY Phone is different. Read through some of the ROMs...95% of the people have no problems and 5% do. It is the nature of the beast. No one can tell which is best for YOUR phone. And if CM7 is giving you terrible battery life, there already is something wrong with your phone setup. You probably need to start from scratch and restore no apps or data and download apps fresh from the market.
I've always had good luck with CleanGB roms & kernals by toadlife.
joedig52 said:
I've always had good luck with CleanGB roms & kernals by toadlife.
Click to expand...
Click to collapse
But not everybody does. There is no best. I can easily say marcusantrom with shadow kernel is best on touchwiz and CM7 with the kernel it comes with is the best in general. I won't say this because different people have different phones and preferences... if you really want the best rom/kernel/theme, make it yourself.
In Soviet Epic forum, clockworkmod root you!

Siyah vs. CM9 Remix | for Resurrection

Hey this is a thread for all the Resurrection lovers out there to discuss what Kernel goes best with Resurrection ROM
I've tried several Kernels by myself but couldn't come to a conclusion which is better in which aspects.
So lets discuss openly the pros and cons of each Kernel
If you have tried any other kernel other than CM9 and Siyah please put your opinions as well.​
Nice post! I'd be interested to see the results from ppl as I just updated to latest 1.7 remix and this time have left the CM9 kernal. I did think about flashing siyah straight after 1.7 package but decided to give CM9 a trial first
Will report in a few days!
deckio007 said:
Nice post! I'd be interested to see the results from ppl as I just updated to latest 1.7 remix and this time have left the CM9 kernal. I did think about flashing siyah straight after 1.7 package but decided to give CM9 a trial first
Will report in a few days!
Click to expand...
Click to collapse
I'm a Siyah fan too but after reading few reviews considered to give a try with CM9 will see how it goes
I'm currently using the stock CM9 with 1.7 and found it to feel pretty good so far, messed up a little yesterday when the phone froze while playing a video.
Before freezing the phone had 50% battery after removing the battery and restarting, the battery had dropped to 15%
I'm still a bit of a noob to all this so go easy
When flashing a new kernel, do I just put the zip on the card and flash?
Or do I need to wipe anything first?
This is my personal opinion, not trying to put anyone down.
Okay tried CM9 Remix kernel for few hours and already fedup :\
I see no better battery life compared to Siyah kernel, in fact CM9 Remix Kernel had lesser support than Siyah.
Lets see;
Siyah -
CWM touch recovery (and full support)
additional cpu governors (lulzactive,smartassV2,etc..)
Overclocking upto 1.6
support for BLN(Back light notifications)
CM9 Remix -
NO CWM touch recover and some of the CWM features are not available
NO additional CPU governors
NO overclocking
NO support for BLN
So for me CM9 Remix kernel isn't the one.
as i have tried Siyah kernel already im going to give Abyss or some other Kernel a try and will update on how it goes
This is a really difficult conversation because there are so many variables.
1) Kernels - each one has configurations so you need to mention what governor you are using and any other mods that you have done to the basic kernal config. Or if you are using it stock without changes you could state that.
2) Apps - all of us have different apps installed and some apps make demands on the system when it is supposed to be "sleeping". Dedicated battery enthusiasts use CPU Spy and Better Battery Stats to try to figure out what is eating the battery all the time. Then they freeze those apps until they are needed.
3) Usage - I'm retired, so I play with my phone a lot....spend an hour a day just reading XDA. I must turn it on at least 30 times between charges. Others have to work, so they put it in their pockets and leave it alone for a while. Some folks play 3D games which consume power like crazy. Using phone data eats more power than wifi. A black background on your screen eats less than a white background... and so on.
So this is not a simple conversation. The more you tell about your situation, the more others can see if it applies to them.
(PS - I´m not talking much about my setup because I'm still on RR 1.1 with Siyah 3.0.1+. I´m trying various governors to see which works best - currently on lutzactive. I'm usually down to around 45% at bedtime which is fine with me.....If I leave the phone alone and just use it as a phone, I can probably go 24 hours.
Siyah: Feature packed, lots of fluff, but very nice options as mentionned earlier.
CM9: Basic, VERY BASIC kernel. Gets the job done and most people sync their base with it.
I personally use CM9 with Siyah, works great.
karendar said:
Siyah: Feature packed, lots of fluff, but very nice options as mentionned earlier.
CM9: Basic, VERY BASIC kernel. Gets the job done and most people sync their base with it.
I personally use CM9 with Siyah, works great.
Click to expand...
Click to collapse
Yeaaa, I agree with You
Siyah Kernel works great with My S2
quijote1 said:
This is a really difficult conversation because there are so many variables.
1) Kernels - each one has configurations so you need to mention what governor you are using and any other mods that you have done to the basic kernal config. Or if you are using it stock without changes you could state that.
2) Apps - all of us have different apps installed and some apps make demands on the system when it is supposed to be "sleeping". Dedicated battery enthusiasts use CPU Spy and Better Battery Stats to try to figure out what is eating the battery all the time. Then they freeze those apps until they are needed.
3) Usage - I'm retired, so I play with my phone a lot....spend an hour a day just reading XDA. I must turn it on at least 30 times between charges. Others have to work, so they put it in their pockets and leave it alone for a while. Some folks play 3D games which consume power like crazy. Using phone data eats more power than wifi. A black background on your screen eats less than a white background... and so on.
So this is not a simple conversation. The more you tell about your situation, the more others can see if it applies to them.
(PS - I´m not talking much about my setup because I'm still on RR 1.1 with Siyah 3.0.1+. I´m trying various governors to see which works best - currently on lutzactive. I'm usually down to around 45% at bedtime which is fine with me.....If I leave the phone alone and just use it as a phone, I can probably go 24 hours.
Click to expand...
Click to collapse
I totally agree with you.
I use my phone very often too. not to play games but to text, listen to music, and i leave the phone data connected always to use IM services.
I'm sure it must be same with any regular user.
I love to play around with my phone as in trying out new stuff on it
This time its the Kernels and OSs that im testing on currently checking Abyss Kernel and already noticed that the soft key lights should be turned on time to time by going to settings :\
will see how well it does in other aspects
melakamc said:
I totally agree with you.
Im use my very often too. not to play games but to text, listen to music, and i leave the phone data connected always to use IM services.
I'm sure it must be same with any regular user.
I love to play around with my phone as in trying out new stuff on it
This time its the Kernels and OSs that im testing on currently checking Abyss Kernel and already noticed that the soft key lights should be turned on time to time by going to settings :\
will see how well it does in other aspects
Click to expand...
Click to collapse
Did you try Siyah with RR 1.7 before going to Abyss? What were your impressions of the usual kernels that you tried? Apparently 1.7 is working well for you?
quijote1 said:
Did you try Siyah with RR 1.7 before going to Abyss? What were your impressions of the usual kernels that you tried? Apparently 1.7 is working well for you?
Click to expand...
Click to collapse
I've been using Siyah with RR 1.2 and 1.5 and battery life came upto 8-10hrs
wanted to try a different kernel and chose CM9 Remix which was in the download section of the RR thread and it was an utter disappointment for ME (others might like it)
refer to my earlier post for results.
currently im testing Abyss and will update on how it goes tonight
which one is the best?
meatlover said:
which one is the best?
Click to expand...
Click to collapse
It depends on user. Im a heavy user and a need freak so CM9 Remix didnt do much good to me trying Abyss at the moment. Await for results
This is very useful and im waiting for updates
AbyssICS (2.6b)
Okay lets see how Abyss worked out for me.
After the utter dissatisfaction over CM9 Remix kernel Abyss was quite impressive with battery consumption.
there's always a BUT
1. the softykey lights were never on even though i change settings, it stays on till the phone display sleeps and even of you turn the screen on again the lights never come back :\
2. Settings -> Storage always keeps force closing and you cant see the stuff in the external SD card even by using a file explorer (root explorer)
3. I didnt like the screen which comes saying some official italian bla bla when you restart the phone that got a very bad design
soooooooo im switching to Siyah-v3.2b4 after seeing its all new cool features and i found a great article on how to get the best out of the kernel
ill share it here : http://forum.xda-developers.com/showthread.php?t=1369817
using cm kernel
got 54 hours earlier with moderate use
haven't had any issue so far been using for 4 or 5 days.
hassanal said:
using cm kernel
got 54 hours earlier with moderate use
haven't had any issue so far been using for 4 or 5 days.
Click to expand...
Click to collapse
WHAT? 54hrs? NOWAY IN HELL
used any tweaks?
melakamc said:
WHAT? 54hrs? NOWAY IN HELL
used any tweaks?
Click to expand...
Click to collapse
No tweaks, but the screen on time suggests that the phone has been on standby most of the time, with no Data.
I always tend to have a fantastic battery performance too when I leave the phone on standby, with no Wifi or Data use.
Regards.
buzzboy said:
No tweaks, but the screen on time suggests that the phone has been on standby most of the time, with no Data.
I always tend to have a fantastic battery performance too when I leave the phone on standby, with no Wifi or Data use.
Regards.
Click to expand...
Click to collapse
That must be it, i use Data connection all the time and my screen is on most of the time
I used the stock cm9 for a while on v1.7 RR and found the battery to last quite well, decided to try siyah 3.1.2 a couple of days ago and day by day it is getting better but not sure its as good as the cm9 yet....gonna stick with it for now and see as it has more options.
Sent from my GT-I9100 using XDA

Kernel &battery saving Q's...

בס"ד
Hey. So I wanted to buy the nexus 4 , and then I've heard that the battery life is suck.
I found out that it could be fixed by installing a custom kernel.
I'd like to apply a cusom kernel
that saves -Alot- of battery , doesnt change anyting specific but the battery usage.
and to still stay with the Original Rom.
Any suggestions? Thanks.
TunneIVision said:
בס"ד
Hey. So I wanted to buy the nexus 4 , and then I've heard that the battery life is suck.
I found out that it could be fixed by installing a custom kernel.
I'd like to apply a cusom kernel
that saves -Alot- of battery , doesnt change anyting specific but the battery usage.
and to still stay with the Original Rom.
Any suggestions? Thanks.
Click to expand...
Click to collapse
try them all out, they are all good. the thing is, all our devices react differently, and all our usages vary with as many users as there are. so the only way that you would find YOUR perfect kernel that YOUR device likes the best is to try them all out. it takes seconds to flash, so time isnt an issue. try one every few days, youll find the one thats for you.
simms22 said:
try them all out, they are all good. the thing is, all our devices react differently, and all our usages vary with as many users as there are. so the only way that you would find YOUR perfect kernel that YOUR device likes the best is to try them all out. it takes seconds to flash, so time isnt an issue. try one every few days, youll find the one thats for you.
Click to expand...
Click to collapse
OK... but all the kernel changes something in the rom. I would like to keep my rom exactly the way it is , exept from the battery usage.
TunneIVision said:
OK... but all the kernel changes something in the rom. I would like to keep my rom exactly the way it is , exept from the battery usage.
Click to expand...
Click to collapse
You can flash any kernel you want, and the ROM will stay the same. The kernel operates "under the hood" (the engine), while the ROM is what you see (rest of the car, to use that analogy). You can use an app called Trickster Mod to tweak kernel settings. Be sure to know what you're doing though, and keep a backup just in case.
Also, be sure if you flash faux or trinity kernel (that I know of), that you flash on top of a stock kernel/reset kernel. If you flash any of those on top of another custom kernel, you could get in trouble (because of the way the kernels are installed).
And the stock kernel is really not as bad as people make it out to be.
Sure custom will usually be better. But stock is not that bad. All those reports of horrid battery life I really don't know what the heck they are doing to be honest.
I used it for a while. And the other nexus 4 in the house is bone stock. It gets off the charger at 530am and needs to be charged around 4pm with around 4 hrs of screen time and 45 mins or so of candy crush.
ameinild said:
You can flash any kernel you want, and the ROM will stay the same. The kernel operates "under the hood" (the engine), while the ROM is what you see (rest of the car, to use that analogy). You can use an app called Trickster Mod to tweak kernel settings. Be sure to know what you're doing though, and keep a backup just in case.
Also, be sure if you flash faux or trinity kernel (that I know of), that you flash on top of a stock kernel/reset kernel. If you flash any of those on top of another custom kernel, you could get in trouble (because of the way the kernels are installed).
Click to expand...
Click to collapse
albundy2010 said:
And the stock kernel is really not as bad as people make it out to be.
Sure custom will usually be better. But stock is not that bad. All those reports of horrid battery life I really don't know what the heck they are doing to be honest.
I used it for a while. And the other nexus 4 in the house is bone stock. It gets off the charger at 530am and needs to be charged around 4pm with around 4 hrs of screen time and 45 mins or so of candy crush.
Click to expand...
Click to collapse
Now that the battery life is improved on 4.3 JB version , I wont be needed to a custom kernel. Thanks alot.

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