Develop Bugs

[Q] What's the best way to flash a kernel?

Yes yes, I'm quite a noob when it comes to this but I've heard so many ways of flashing a new kernel. So what's the way you flash it?
I've heard:
1. Wipe cache, dalvik, and battery stats and flash kernel.
2. Charge until full, wipe cache, battery stats, and flash kernel.
3. Wipe cache, battery stats, flash kernel, run battery to 0%, charge until 100% and turn phone on.
I'm currently using method 2 but all I really wanna know is if there is a "right" way to do this.

Really people do it different ways but to me its all the same .give your kernel like 2 days to get use to your phone and see the results
Sent from my PC36100 using XDA App

I always wipe cache and dalvik and then flash. I only ever wipe battery stats when flashing a new ROM and I always put a fully charged battery in after flashing but before the first boot.
Sent from my PC36100 using XDA App

Thanks guys. Yea I've always stuck to my way but I guess to each their own. I now have the sudden urge to flash something haha.

Battery stats want reset!

I'm using android revolution 4.0. Its working perfect, but the time on how long the battery has been without charging will not reset either by charging or reboot. If I reboot into clockwork mode an reset battery stats it will, but then it hang again.
What will be erased by deleting dalvik cache, and is it a chance that will help?
Sent from my Desire HD using XDA App

garman76 said:
I'm using android revolution 4.0. Its working perfect, but the time on how long the battery has been without charging will not reset either by charging or reboot. If I reboot into clockwork mode an reset battery stats it will, but then it hang again.
What will be erased by deleting dalvik cache, and is it a chance that will help?
Sent from my Desire HD using XDA App
Click to expand...
Click to collapse
deleting dalvik cache wont help.. but that rom is in beta its not meant to work properr at this stage because its a leaked rom and dev's are working hard to make it stable in their releases... that rom is not for day to day use.

[Q] Phone gets really hot.

I have a big problem. Today I installed a new rom (CM7) new radio and ril (the newest one) and recalibrated the battery.
Since then I have a really high battery drain (about 200-400 just on homescreen) and my phone gets really hot.
Does anybody know what to do?
thx for your help
Sent from my Desire HD using XDA App

Hi Lord_Schrotty
Did you flash CM7 with the recommended CWM version? Flashing using a not recommended can cause such issue.
In addition, did you do a full wipe before flashing?

superstick1 said:
Hi Lord_Schrotty
Did you flash CM7 with the recommended CWM version? Flashing using a not recommended can cause such issue.
In addition, did you do a full wipe before flashing?
Click to expand...
Click to collapse
yes did a full wipe, and i flashed it with the newest cwm version

Lord_Schrotty said:
yes did a full wipe, and i flashed it with the newest cwm version
Click to expand...
Click to collapse
has you got the cm7.0.0 or 7.0.2?
7.0.2 has very very better bat. drain... if all goes well...
are you overclocking the proccessor?

SERGI.3210 said:
has you got the cm7.0.0 or 7.0.2?
7.0.2 has very very better bat. drain... if all goes well...
are you overclocking the proccessor?
Click to expand...
Click to collapse
i'm on 7.0.2 overclocked to 1.3 ghz with lordmod kernal 4.6

Lord_Schrotty said:
i'm on 7.0.2 overclocked to 1.3 ghz with lordmod kernal 4.6
Click to expand...
Click to collapse
1.3 ghz is not soo much...
when i was tried CM7.0.2 i was staid with his stock kernel... my batt drain was well...
maybe you should re-flash the rom... you did this when flashed?:::
1-full wipe (fact. reset, cache and dalvik)
2-all formats (in mounts & storage paragraph)but NO FORMAT SD-CARD
3-FLASH cm7.0.2 and reboot the phone...
4-THEN GO BACK TO cwm and wipe battery status... reboot again
5- turn to cwm AND FLASH THE KERNEL
5-reboot & try
It is exactly what I would do

Lord_Schrotty said:
i'm on 7.0.2 overclocked to 1.3 ghz with lordmod kernal 4.6
Click to expand...
Click to collapse
To rule it out as the issue, drop max clock to 1GHz and see if that helps. They will get warmer running at higher clocks (that's why my PC has a HUUUOOOWWWWGGE heat sink and fans!).
[EDIT] Sorry Sergi, jumped on this before seeing your reply. Have a free "thanks".

Mr_JMM said:
To rule it out as the issue, drop max clock to 1GHz and see if that helps. They will get warmer running at higher clocks (that's why my PC has a HUUUOOOWWWWGGE heat sink and fans!).
[EDIT] Sorry Sergi, jumped on this before seeing your reply. Have a free "thanks".
Click to expand...
Click to collapse
don´t worry buddy your posts always are soo useful!
thank´s for your thank´s LOL

SERGI.3210 said:
1.3 ghz is not soo much...
when i was tried CM7.0.2 i was staid with his stock kernel... my batt drain was well...
maybe you should re-flash the rom... you did this when flashed?:::
1-full wipe (fact. reset, cache and dalvik)
2-all formats (in mounts & storage paragraph)but NO FORMAT SD-CARD
3-FLASH cm7.0.2 and reboot the phone...
4-THEN GO BACK TO cwm and wipe battery status... reboot again
5- turn to cwm AND FLASH THE KERNEL
5-reboot & try
It is exactly what I would do
Click to expand...
Click to collapse
that's exactly what i did
i think i'll flash another radio tomorrow, maybe that was the problem.

Lord_Schrotty said:
that's exactly what i did
i think i'll flash another radio tomorrow, maybe that was the problem.
Click to expand...
Click to collapse
Sorry but could you lower the clock speed to see if it helps.
You have to be mindful that not all CPU's are made equal. Some aren't as good as others and it really is pot luck.
Try changing voltages if am option on your Kernel

Lord_Schrotty said:
that's exactly what i did
i think i'll flash another radio tomorrow, maybe that was the problem.
Click to expand...
Click to collapse
SOO strange... please post your results here when you flash a new radio...for to learn
but i continue believing that you will end reflashing the rom.. maybe something went out badly...

SERGI.3210 said:
SOO strange... please post your results here when you flash a new radio...for to learn
but i continue believing that you will end reflashing the rom.. maybe something went out badly...
Click to expand...
Click to collapse
ok tomorrow i'll flash a new radio and reflash the rom. hope it will fix it

i reflashed now the newest radio, after that i wiped everything out and flashed rcmix hd rom, because of the official gingerbread coming. i hope it works now. i'll post my experience in a few hours.

Lord_Schrotty said:
i reflashed now the newest radio, after that i wiped everything out and flashed rcmix hd rom, because of the official gingerbread coming. i hope it works now. i'll post my experience in a few hours.
Click to expand...
Click to collapse
okay man...
one question? what´s the baseband version that you are using now exactly?

[Q] Downgrade from CM7.2 to CM7.1

Has anyone downgraded from CM7.2 to CM7.1? For some reason CM7.1 seems much more stable on my phone. Is downgrading as easy as upgrading?

Nytmarez said:
Has anyone downgraded from CM7.2 to CM7.1? For some reason CM7.1 seems much more stable on my phone. Is downgrading as easy as upgrading?
Click to expand...
Click to collapse
You need to install a stock rom, flash clockworkmod, then flash cm7.1.
But you can make a backup, wipe data cache and dalvik and flash cm7.1, without stock rom flashed..
But why would you?
I think 7.2 is better..
Sent from my GT-S5660 using xda premium

Well, I tried 7.2 on my phone and it is not as stable as 7.1 for me. I am constantly having problems connecting to my home wifi network (have to enable/disable the wifi adapter a couple of times), phone restarts from time to time for no reason, unlock screen blinks one time before it t actually appears on screen and some other minor issues. Didn't have any of these issues with CM 7.1 so I think of going back to it. I'll probably go go for the wipe cache/dalvik solution in that case. Thanks for your reply.
Sent from my GT-S5660 using Tapatalk

Did you patch CM 7.2 with patch 4? The patch fixes most of the things and the rom is the most stable for me.

Yes, I did. Did I need to wipe something before or after applying it?
Sent from my GT-S5660 using Tapatalk

Update: I've just tried to wipe the cache partition plus the dalvik cache and it seems that most of the problems are gone now. I would recommend doing this to anyone with the same issues as mine.
Sent from my GT-S5660 using Tapatalk

You always have to wipe the cache/factory reset and dalvik cache before installing a new rom otherwise problems will obviously occur.
Glad that you solved the problem. If you still face some problems then wipe the cache/factory reset and the dalvik cache and flash the rom again with patch 4 and gapps.

I use stock rom, better than CM7.2/7.1. No lags in games, no screen flicker, no f****n problems. Same performance and better battery life.

LegoGabi said:
I use stock rom, better than CM7.2/7.1. No lags in games, no screen flicker, no f****n problems. Same performance and better battery life.
Click to expand...
Click to collapse
Stock rom with custom kernel??
Sent from my GT-S5660 using xda premium

Nope, just stock rom with root and some stock apps deleted, that's all. Maybe i will flash the kernel for stock roms, maybe.

LegoGabi said:
Nope, just stock rom with root and some stock apps deleted, that's all. Maybe i will flash the kernel for stock roms, maybe.
Click to expand...
Click to collapse
What benchmark results do you get with the stock ROM (either Quadrant or Antutu)?
Sent from my GT-S5660 using Tapatalk

Nytmarez said:
Has anyone downgraded from CM7.2 to CM7.1? For some reason CM7.1 seems much more stable on my phone. Is downgrading as easy as upgrading?
Click to expand...
Click to collapse
Assuming you really want to downgrade to CM7.1 I think you can format /system, /data and such from CWM, then apply CM7.1 zip file. No need to install stock ROM first.
BTW I saw in CM-related instructions that when you have some problem with CM that you don't know how to fix try first doing wipe, usually that helps. It seems it helps in your case as well

Yeah, that's right

Dude, leave the f***in benchmarks, my phone is faster in games. With CM 7.2 last time my result in quadrant was 2600, but it was bulls**t cause i had lag in games.

Yup, I also find benchmarks are useful for bragging only. They almost never tell anything real about phone performance in a real application.
So you have to try different ROMs to find the one that would suit you.

Well, I guess it depends on what one uses his phone for I don't play any games and my phone is definitely faster with CM7.2. But as JustVass said everyone has to find the one that best suits him

[Q] Horrible battery life.

I feel as if I'm the only one with horrible battery life. On average my battery lasts around 8 hours and that's if I check up on it once in a while. I was at 41% charge and I watched a 4 minute youtube video and my battery dropped to 33%. My phone was rooted but that was it, I don't have any knowledge on roms or anything. Can anyone else recommend what to do with my phone? I don't want to sacrifice usability but I really need a longer lasting battery. Are there any ROMS I can download, or kernels, basically anything to help out.

Try out the infamous 2.0 kernel, can grab it from the infamous rom i believe.
its known to give really good battery life. also kts kernel with good set up can also give good battey life.
can also download betterbatterystats and see what is draining your app. try disabling sync and look at how many accounts are synching...all those are factors in battery drains.

mgbotoe said:
Try out the infamous 2.0 kernel, can grab it from the infamous rom i believe.
its known to give really good battery life. also kts kernel with good set up can also give good battey life.
can also download betterbatterystats and see what is draining your app. try disabling sync and look at how many accounts are synching...all those are factors in battery drains.
Click to expand...
Click to collapse
Okay, I need to root my phone real quick. I'm going to download the infamous 2.0 kernel, and I'll try to find where I can download a kts kernel, do you have a link to this kernel? Also how do I install kernels . Thank you. Is there any rom for me to download?

You flash kernels like anything else. I'd suggest cwm paired with ROM manager.
Sent from my SGH-M919 using XDA Premium 4 mobile app

Karakoram2 said:
You flash kernels like anything else. I'd suggest cwm paired with ROM manager.
Sent from my SGH-M919 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
I've never actually flashed anything.

beriously said:
I've never actually flashed anything.
Click to expand...
Click to collapse
Well make sure you do a lot of reading before you do any flashing...

beriously said:
I've never actually flashed anything.
Click to expand...
Click to collapse
Before you flash ANYTHING you should ALWAYS do a nandroid backup. This backs up what your currently running and if you get in a pinch you can always restore your nandroi d backup. Never install anything without doing your backup first. You will be very glad you have that backup at times. To flash a rom or kernel you must first be rooted. Then your steps are first do your nandroid backup then go into recovery by pressing volume up power and home button. This will take you to your custom recovery that you installed after rooting. Then you wipe data factory reset then wipe cash and dalvik now you won't have a system and you can cleanly install your rom. You will choose zip from sd card.scroll through and find the rom you placed on the root of your sd card. Now install then reboot. That's it. If there is any issue with the rom you can restore your backup the same way but you would wipe then press restore backup and choose the backup you wish to restore. Hope this helps. But read read and read again. Do not make any changes to your device until your comfortable and have read and understood the processes thoroughly!!!

realsis said:
Before you flash ANYTHING you should ALWAYS do a nandroid backup. This backs up what your currently running and if you get in a pinch you can always restore your nandroi d backup. Never install anything without doing your backup first. You will be very glad you have that backup at times. To flash a rom or kernel you must first be rooted. Then your steps are first do your nandroid backup then go into recovery by pressing volume up power and home button. This will take you to your custom recovery that you installed after rooting. Then you wipe data factory reset then wipe cash and dalvik now you won't have a system and you can cleanly install your rom. You will choose zip from sd card.scroll through and find the rom you placed on the root of your sd card. Now install then reboot. That's it. If there is any issue with the rom you can restore your backup the same way but you would wipe then press restore backup and choose the backup you wish to restore. Hope this helps. But read read and read again. Do not make any changes to your device until your comfortable and have read and understood the processes thoroughly!!!
Click to expand...
Click to collapse
Thank you so much! I've successfully installed the infamous Rom and it looks cool so far, the question that I have is can I have a rom installed and can I download Kernels from other Roms. I'm still trying to maximize my battery life .

beriously said:
Thank you so much! I've successfully installed the infamous Rom and it looks cool so far, the question that I have is can I have a rom installed and can I download Kernels from other Roms. I'm still trying to maximize my battery life .
Click to expand...
Click to collapse
Yes you can download and install other Kernels as long as they are compatible with your rom. For example, if you have the Infamous Rom installed which is TW (TouchWiz) based as opposed to AOSP/CM based, you can install compatible TW kernels. I'd recommend looking into the KT-SGS4 Kernel at http://forum.xda-developers.com/showthread.php?t=2393708.

Check out the thread started by skipjacks called "insanely better battery life when idle." It will help you get tremendous improvements in battery while you are not using the screen.
Sent from my SGH-M919

lalec said:
Check out the thread started by skipjacks called "insanely better battery life when idle." It will help you get tremendous improvements in battery while you are not using the screen.
Sent from my SGH-M919
Click to expand...
Click to collapse
Its true. It will help. But keep in mind you have to sacrifice some features to achieve it. Its a great solution for some, a horrible solution for others.
Sent from my SGH-M919 using xda app-developers app

I installed Infamous rom yesterday and in total i got 6 hours and 30 minutes of screen time... this was a huge improvement, i was using it heavily the entire time, i was watching video after video... I dont know if its the best rom out there but it works for me.
Edit- Just installed the KTS kernel, hopefully this will further extend my battery life.

beriously said:
I installed Infamous rom yesterday and in total i got 6 hours and 30 minutes of screen time... this was a huge improvement, i was using it heavily the entire time, i was watching video after video... I dont know if its the best rom out there but it works for me.
Edit- Just installed the KTS kernel, hopefully this will further extend my battery life.
Click to expand...
Click to collapse
6:30 of screen on time is pushing the upper limit of what you can expect to see. So it sounds like you have fixed your issue as well as you can.
Sent from my SGH-M919 using xda app-developers app

Infamous alpha 9.1