Hi guys, i've been using MIUI Rom on my Galaxy S i9000 for a week now and it's really really fast, smooth and just excellent!
The only problem I have is that my Data connection seems to be very slow.. I'm in Australia on the Telstra network. I get the "E" in the notifications bar which means i'm connected to Edge data, but the speeds are really slow. I'm starting to think the modem band (850hz?? or 1200hz??) in the MIUI rom is not well suited to my network carrier.
Anyway, my question is -- Is it possible to flash an Australian modem for the MIUI rom i'm currently running?
The ROM i'm running is the one in this thread:
http://forum.xda-developers.com/showthread.php?t=992251
I'm running it with the Glitch Kernel - V9B.
I realise these CM7/MIUI roms are not really based on Samsung firmware, but I can't tell if they are good for Australian network carriers. The modem I would want to flash are either 'UGJL2' or 'UGKC1'. (both for American/Australian locality).
Apart from my 3g data speed, the phone is phenomenal -- especially after I overclocked to 1.2Ghz.
Btw, this is my first post but i've been visiting these forums almost daily since August 2010. I've tried searching but just cant find the answer
Cheers!
Hmm i dont think u can use UGJL2 nor UGKC1 but i could be wrong.
U should backup ur rom in recovery and try it out.
If u flash the modem from odin or recovery and cant boot into miui after then reinstall the miui rom and see if it works and if it dos then restore ur rom.
I am 90% sure u cant brink it that way.
Or meby someone else has a better idea?
Edit : overclocking to 1.2 dont it drain up power quicker?
Hey thanks for your reply.
I tried a number of different roms -- firstly I tried flashing Froyo and GB roms. They all caused my phone to not detect any network carriers and also triggered a reboot after 5 minutes of running.
Turns out you can't just flash any modem you want based on Samsung Roms if you are using a CyanogenMod build. You need to use the ones listed on this site: sourceforge.net/projects/teamhacksung/files/galaxys/
After trying some different modems, it turns out it's just this sim card my company gave me -- I don't think it's setup correctly for data. I will be calling them to sort it out.
I tried a SIM card from another australian carrier - Optus - and it works quite nice and fast.
In regards to OC to 1.2Ghz, I have not so far noticed an increase in battery drain. Speaking purely in numbers, it surely must use more juice. I charge the phone each night while I sleep so in the morning it's always 100% -- with this routine, the performance boost is fantastic and i'm not impacted otherwise.
Cheers.
if you are overclocking, you could try a little undetvolting too, this will keep the performace but decrease the battery consumption,
it can make ya battery last a little longer
also, i use JVO modem for MIUI, and i must admit its the best modem i have tried, always full signal with data and wifi, perhaps you could give that one a try.
its also been reported to increase battery life (as the phone is not constantly searching for a better signal)
I just did a clean re-install of the latest MIUI -- MCGv3.11 & Glitch-V9C-D
It came with the JVO modem, which was a little bit better than before.
Afterwards I installed the CM7 KC1 Modem and it's flying! It's too early to comment on battery life but others say its decent.
The KC1 modem is recommended for anyone running 850Hz band in America, Canada or Australia.
As for the UV, I was not able to get a stable 1.2Ghz OC without -75 UV. So I figure that's a good thing for my battery life
Could u link the overclocking and undervolting guide as i would like to try it ou ?
each kernel responds differently to undervolting / overclocking so its up to you to find the best set up.
download pimp my cpu and toggle between settings till you find the right one.
when i OC'd i used Tk-Glitch kernel overclocked to 1.2ghz and undervolted 250mv and that was awesome speed with better battery life
azzledazzle said:
each kernel responds differently to undervolting / overclocking so its up to you to find the best set up.
download pimp my cpu and toggle between settings till you find the right one.
when i OC'd i used Tk-Glitch kernel overclocked to 1.2ghz and undervolted 250mv and that was awesome speed with better battery life
Click to expand...
Click to collapse
Ok nvm the links i found it and done it.
altho i had my phone meltdown and freeze when doing -50mhv and -75 as well so i left it at 0 this time and its faster but still same bat drain tho.
you need to set the overclock at boot, so the phone is always running at whatever you select.
i tried putting mine at 400mhz when in standby but the phone would never wake up
oh man i installed the overclocking and now i cant call and when trying to setup my carrier it said i had to insert the sim
I think i am sticking to the normal speedmod kernal
Related
Simple Poll.
Have you seen a decrease or increase?
Someone can explain this battery drain?
in a lot of roms based on 2.2.1 there is a big battery drain, in some other there isn't.
nagash91 said:
Someone can explain this battery drain?
in a lot of roms based on 2.2.1 there is a big battery drain, in some other there isn't.
Click to expand...
Click to collapse
Reboot after unplugging from USB and battery drain is gone. For further improvement install SetCPU and reduce min/max frequency. I am getting more or less the same lifetime as with donut ROMs.
AndDiSa said:
Reboot after unplugging from USB and battery drain is gone. For further improvement install SetCPU and reduce min/max frequency. I am getting more or less the same lifetime as with donut ROMs.
Click to expand...
Click to collapse
OK I have done.. but the problem is that when I use it 3 o 4 minutes (for example I install an application using a file explorer, then I read a message and then I come back to home) m battery get 5% lower...
In standby I lose 10% in 6 - 7 hours (I think this is normal).
AndDiSa said:
Reboot after unplugging from USB and battery drain is gone. For further improvement install SetCPU and reduce min/max frequency. I am getting more or less the same lifetime as with donut ROMs.
Click to expand...
Click to collapse
I am currently without a computer therefore immune to this USB bug. I flashed CM6.1 to this and the other g1 and both suffered substaintial amounts of battery drain so I nandroid restored back to CSDIv4 and still the lowest frequencies and settings did little to combat the descending digits. So I tried this...
Recalibrated my battery
Flashed SuperWipe.zip
Reboot
Flashed SparksMod's latest
Reboot
Wiped battery stats
Unplugged...reboot
Battery lasted 23 hours the first day never seen anything like it.
Lifes great.
Sent from my HTC Grandaddy via XDA app
Sent from my HTC Grandaddy via XDA app
I'm using TMUS-G1-Froyo CM6 remix..
and I'm using the new radio with +14mb.
The rom flies but the battery go down too fast.
I'm using setCPU with 256 - 528 mhz while screen is on, 122 - 256 mhz while screen off.
If I go to battery use in settings I see
Cell standby 45%
display 28%
phone idle 22%
android system 3%
I don't think is normal... cell standby is the battery use by cell radio..
I wonder if the new radio give a big battery drain..
nagash91 said:
I'm using TMUS-G1-Froyo CM6 remix..
and I'm using the new radio with +14mb.
The rom flies but the battery go down too fast.
I'm using setCPU with 256 - 528 mhz while screen is on, 122 - 256 mhz while screen off.
If I go to battery use in settings I see
Cell standby 45%
display 28%
phone idle 22%
android system 3%
I don't think is normal... cell standby is the battery use by cell radio..
I wonder if the new radio give a big battery drain..
Click to expand...
Click to collapse
I got real excited when I heard about the new radio and hboot even thought that its exclusion was the source of the the battery issues. Haven't been able to try it as I'm without a up-to-date PC at the moment.
It would be real nice if I could find a seasoned dev who understands battery consumption. I thought the kernal was the main culprit but I've tried two different roms with the same kernal and one has notably better battery life than the other. So confusing.
Sent from my HTC Grandaddy via XDA app
I can't use my phone with this battery drain...
I will come back to official android OTA-AOSP 1.6.. with +14mb.
So I'll test if this kernel with 14mb is a cause of battery drain.
PS: I'm not a lover of rom customizations.. I think the official roms are the best.
The other are all too heavy. I'm not a fan of cm kernel, that is too heavy for g1.
I would see an official OTA 2.2 without customizations, so every one could customize as he want, and if he want.
PS: OK I flashed AOSP 1.6 using ezBiff_kernel to have 15mb (cause I have new radio and spl, so I can flash roms only using this kernel).
Result: my battery life is similar to froyo 2.2 roms... so the problem is:
1) Kernel? (ezBiff_kernel is based on cyanomod kernel... ... ... heavy as death)
2) New radio/spl?
3) My battery (I don't think so.. it's new battery. I buy it 2 weeks ago and in the beginning it works so well.. but then I flashed new radio/spl and new kernel for 15mb..)
nagash91 said:
1) Kernel? (ezBiff_kernel is based on cyanomod kernel... ... ... heavy as death)
Click to expand...
Click to collapse
Come now.. the cm pershoot kernels are super optimized so they don't collapse under the heavy as death rom that is usually on top of it..
I get mixed results with that kernel between testing and feedback.
A test phone can idle on wifi+2g for days on the stock g1 battery even after a usb unplug.. but on more common use with syncing services its not performing as well as I'd like..
Some of it is fixed with less swap/compcache or changing clock speeds 122/480 for most the speed but lower voltage levels. Also the interactive governor may work better.. I'm testing these ideas if results are good my next kernels defaults will use them.
Cm/pershoot have some interesting new power management code from other htc devices.. So hopefully soon all will be better. (I merged most of it to my kernel but there are some loose ends.. works well untill the phone locks up.. so no public release yet)
ezterry said:
Come now.. the cm pershoot kernels are super optimized so they don't collapse under the heavy as death rom that is usually on top of it..
I get mixed results with that kernel between testing and feedback.
A test phone can idle on wifi+2g for days on the stock g1 battery even after a usb unplug.. but on more common use with syncing services its not performing as well as I'd like..
Some of it is fixed with less swap/compcache or changing clock speeds 122/480 for most the speed but lower voltage levels. Also the interactive governor may work better.. I'm testing these ideas if results are good my next kernels defaults will use them.
Click to expand...
Click to collapse
Ok sorry I talk without knowledge. I really don't know the effect of the cm kernel. I only know that all roms based on cm release, with cm kernel, are so heavy and slow.
I like your rom (2.2.1 AOSP) and I love your new way to get 14mb.
But I have this orrible problem. My phone has a lot of battery drain when I use it. With screen off, no problems.
I have never used swap or compcache in this days, and I also try different clock speeds (not over 528mhz).
The result is that when I unlock my phone, I go to settings, I see for example 95% battery. Ok, I return to home, I open a message, I return to home, I open contacts and I scroll some contacts without make calls.
Then I come back to battery settings and I see that is 92-93%..
in 2 minutes of soft use.. I think this is impossible. If I open stupids 2D games... ahah in 5-10 minutes my battery lose 10 - 20%.
I remember 1 year ago, with 1.6 (no cyanomod) my battery was good.
Now it isn't (I have a new battery).
Today I flashed aosp 1.6 with your kernel for 14mb (I have new radio&spl) but nothing... I lose a lot of battery percent as in froyo.
So I think problem is or battery calibration, or something to wipe, or cm kernel, or new radio&spl + your new kernel...
Now I'm recalibrating battery (is at 1% from 2 hours, I'm not using it.. ) then I will recharge for 8 - 9 hours and then wipe battery state, but I have done this process a lot of time without a benefit.
I'll try to remove the new radio+spl (so also using standard kernel) if my battery continue to lose percents so fast.
I'll keep you update on my "story".
PS: Sorry for my bad english!! XD
OK.. after a day of low discharging and a night of 8 hour of recharging, I wiped battery states, I wiped data-cache-ext ecc... I flashed aosp 1.6 and ezbiff kernel..
"battery drain" continue...
I will try tomorrow to reflash death-spl and old radio..
BTW, is normal for hours battery 4v at 90%?
On the back of the battery sais 3.7v... I thought 3.7 was the voltage for 100%
Update
I know this thread is a little old, but I ran into this problem as well. What I found was that the official US radio (2.22.23.02) used considerably more battery than the international one (2.22.19.26i). The other thing I noticed is that switching to "use 2G networks only" in mobile networks settings and disabling data over mobile drastically improved battery life.
I also noticed that wifi used a fair bit of juice so my recommendation is to disable wifi if you're going to be on the go for a bit, and disable data/3g if you're just going to be hanging out in the local webcafe, your/a friend's house, or some other location with wifi access for a while.
If you wanted to be ambitious and cared enough you could write a script to use as a shortcut on the home screen to do the swap automatically (detect which setting(s) are enabled and swap them to the opposite).
With those changes, you should get much better battery life. My thoughts on different Froyo flavors is that possibly different builds have different settings by default. Cyanogen comes with data and 3g enabled by default so this will quickly suck out your battery if you're running your 3g, 2g and wifi antennas all at once.
The stock build (1.6) got about the same battery life as I'm getting now with those settings applied. With either build, having all antennas on all the time will drain your battery very rapidly. Being a little more cognizant of the settings (perhaps you also had it set to 2g only on the stock build) you're using will significantly improve your battery life. And when I say significantly, I mean night and day (but the antenna version definitely does also make a difference... at least in my case).
When I check cell standby in battery usage, it says it has spent 50% of it's time without signal. I never had this issue up until recently after a new 2.2.1 rom that used the JL2 modem, and now it seems to not go away no matter what rom or modem I use, could it be modem specific but I'm carrying over data? It seems I am not the only one with this bug and going into airplane mode temporarily fixes it.
hamburgertrain said:
I never had this issue up until recently after a new 2.2.1 rom that used the JL2 modem
Click to expand...
Click to collapse
Odd, I also had that display with a few modems until I installed the JL2, then it dropped to 0%.
Since it was always 50%, never anything else but 50%, I assumed it was a display error. I know for a fact that my phone did not spend 50% of its time with no signal, so other than the display, I don't think this is a real problem.
arffer said:
Odd, I also had that display with a few modems until I installed the JL2, then it dropped to 0%.
Since it was always 50%, never anything else but 50%, I assumed it was a display error. I know for a fact that my phone did not spend 50% of its time with no signal, so other than the display, I don't think this is a real problem.
Click to expand...
Click to collapse
Well the thing is it seems to drain my battery, alot.
hamburgertrain said:
Well the thing is it seems to drain my battery, alot.
Click to expand...
Click to collapse
it seems to be an issue with 2.2.1 (for me, at least). I never had an issue running HSUPA modems until switching over to the JPX/JPY based ROMs... after that I'd get the random "no service" issue and lots of battery drain (also the 50% without signal issue). I don't think this has much to do with the framework so much as the kernel (JPX Source based). as running an earlier kernel (JPM source based) with the newer modems doesn't seem to have these problems crop up.
2.2.1 kernel + 2.2 HSUPA modem (UGJL2, TLJL3, UGJK4) = random no service/bad battery life (for me, I know this isn't true for everyone for some reason)
2.2 kernel + 2.2 HSUPA modem = no issues
2.2 kernel + 2.1 HSUPA modem = bad battery drain
if you're having these issues and don't mind "reverting" to an earlier kernel to see if that helps, it could be worth a shot. I believe xcalibur's 2.2.4 should work just fine (if you're running JPX/JPY you need to modify vold.fstab to get your sd cards to mount properly)
Can anyone tell me what is the best ROM for battery life? Or best Kernal/Modem combo?
I dont mind a stripped down ROM.. dont use many features!
I've tried many ROMs life Darky Resurrection 10.2/Simplicity 0.31/Surface 3.1 & 3.2/Juicy 3.0 etc etc. but cant settle on one...
Battery lasts 18hours max.. (some calls/wifi use/fruit ninja for max 30 mins~1 hr)
Have tried recalibrating my battery too..
Currently on Surface 3.2 with Speedmod T24 kernal
thanks
hdaackda said:
Can anyone tell me what is the best ROM for battery life? Or best Kernal/Modem combo?
I dont mind a stripped down ROM.. dont use many features!
I've tried many ROMs life Darky Resurrection 10.2/Simplicity 0.31/Surface 3.1 & 3.2/Juicy 3.0 etc etc. but cant settle on one...
Battery lasts 18hours max.. (some calls/wifi use/fruit ninja for max 30 mins~1 hr)
Have tried recalibrating my battery too..
Currently on Surface 3.2 with Speedmod T24 kernal
thanks
Click to expand...
Click to collapse
If you prefer Samsung roms, try Milkeys, very good battery life.
CM/Miui , actual Twooey III (Galnet) ist good, pure english actual version also really good battery life.
karbid
These threads are worthless. Each users battery usage is going to be COMPLETELY different. It all boils down to your configuration,personal usage, Wi-Fi usage, GPS usage, apps installed, Your settings,what you allow to run in the background, and hundreds of other variables. Plus there are about 62 threads in the forums asking this same exact question with at least 5xs as many different answers.
Anyways. Cm7 is what I use and get about a day and a half if I need to.
Bottom line, no 1 rom is any more spectacular over another one when it comes to battery. Find one you like and take steps to get your battery and usage in sync.
mrrick said:
These threads are worthless. Each users battery usage is going to be COMPLETELY different. It all boils down to your configuration,personal usage, Wi-Fi usage, GPS usage, apps installed, Your settings,what you allow to run in the background, and hundreds of other variables. Plus there are about 62 threads in the forums asking this same exact question with at least 5xs as many different answers.
Anyways. Cm7 is what I use and get about a day and a half if I need to.
Bottom line, no 1 rom is any more spectacular over another one when it comes to battery. Find one you like and take steps to get your battery and usage in sync.
Click to expand...
Click to collapse
I have tried many many ROMs and cant figure it out.. sometimes suggestions help
My Wi-Fi usage is more, but dont use GPS much, No autosync or Data.. No autobrightness (keep it to a minimum), I try and disable autostarts of almost all apps
edit due to post being moved to its rightful place
Insanity cm032/platypus neo9 redux 5
My Bad.. someone pls move the thread to Q/A
Darky 10.1 + Semaphore 1.4.2 kernel are the best combination I've had so far.
also remember to do "Clear data" of "Media Storage" from "Settings->Applications->Manage Applications" after flashing any kernel or ROM. (to avoid system_server bug that waste CPU)
Surface JVQ
I have observed Surface JVQ goes well for battery life, try that.
Lets say battery life with just wifi always on and which rom last longer? 2days or more??
Best Battery life .. I'd Say FROYO. !
dont wana move back to Froyo.... let stick to Gingerbread
Darky's 10.2 RE here on JVQ, try replacing XXJVO modem with ZSJPG modem, I flashed it a week or so ago after awful battery life & I'm getting easily 2-3 days on same usage as you, you'll want to keep an eye on your 3G, coverage & GPS if you use it just to make sure signal strength in your location is as good as before though.
J 3 M said:
Darky's 10.2 RE here on JVQ, try replacing XXJVO modem with ZSJPG modem, I flashed it a week or so ago after awful battery life & I'm getting easily 2-3 days on same usage as you, you'll want to keep an eye on your 3G, coverage & GPS if you use it just to make sure signal strength in your location is as good as before though.
Click to expand...
Click to collapse
I don't use 3g at all. Very very less gps.. Will try that, thank u
Also, can you give me a link to the zsjpg modem and howto install/flash. Hav installed darky resurrection..
Sent from my GT-I9000 using Tapatalk
No worries, find it HERE & makes sure you read as much as you can.
My way to best batteries life is Juwe 5.1 jvq rom + Galaxian Kernel EE. Normal using ( callin, summary more than 3 hours, gaming 3-4 hours, sms, www 2-3 h) on one charging. Finnaly phone was active more than 40h.
The best solution:
1.Rom with dark colours theme, less colours less battery drain.
2.Proper kernel like Galaxian or Talon
3.Proper charging , bumpy charging method.
that's all
Moved to the ZSJPG modem, SpeedMod t24 kernal, a lighter ROM (Surface 3.2).. can already feel the difference!!!
Galaxian kernel seems to be juicing less batt source as compare to semaphore
hdaackda said:
Best ROM for battery life?
Click to expand...
Click to collapse
every rom off
Juwe's Smart Edition v5.3 XXJVR best battery life for me so far.
75% of Battery free after 18+ hours of use [10-12 calls/books 20+mins/wifi full time/video15+mins]
JUWE"S 5.2 JVQ + Talon 4.4.20-1200 + RFS + 119 sys apps + 60 user apps
I have a pic attached. Check this link
I've had my captivate for over a year now, with mixed results.
Honestly i love the phone, and if i could work out my issues, probably can go another year without having to get a new phone.
My biggest problems are the battery, and the bugs.
When i bought my phone my battery life was ok. When i finally put a custom rom on and re-calibrated my battery, i would go as far as to say it was pretty good. (I even have a screen shot from the good ol days when i would go to work, and come home, and it would say something like - unplugged for 11 hours, and i would be at ~70 percent)
Now on an average day, i leave for work at about 630 and when i get out at 2 its usually down to 20-30 percent. I actually own 2 captivates and its the same case with both of them.
I dont understand what is different now from before. Ive actually tried the old roms which i got such good battery life from (serendipty 6.2 i think, and cognition) and still its terrible now.
I have recently used apex, cyanogenmod, miui, GR12, and maybe a few other, all with terrible battery and bugs.
Thats the next issue, the bugs are getting to a point where the phone is almost unusuable.
Many times google voice has just failed on me. Ill get out of work and see no texts, my data will work, so i figured theres no problem, but then ill restart my phone and everything will come in.
Im currently using apex, so thats my biggest problem with bugs, but cyanogenmod/miui were really bad.
Then theres the ugly, which is when my battery goes in super drain mode. Itll go down 1 percent every 2-3 mins sometimes, and the only way to halt the super drain is to plug it in for a few mins
I dont get what the difference is from then to now, but i was wondering if anyone else experiences these issues.
Maybe its the way im flashing or something, i dont really know anymore.
Any suggestions?
Have you seen which process/app is eating your battery? Could possibly be an app from market causing this
what is it you need from a custom rom? i've found i get the best battery life and stability from stock samsung roms, ie KH3. CM7 was wiped about 15 minutes after flashing.. it seems very experimental on the captivate, definitely no way i'd be able to use that as a daily rom
I had the same issue when i was using CM7. more battery drain on standby. Now i m using KH3, there is no battery drain on standby.
Try KH3 based ROM, if you are losing battery on standby
Well havent tried a KH3 rom yet, but i think apex is js7 based, which is an official rom.
I agree CM7 was very buggy, but ive seen the same with apex.
Honestly I used to get awesome battery life with cognition, and i reflashed that same rom, and now it sucks.
The only apps i have installed are:
adobe reader
beautiful widgets
colornote
docs 2 go
google voice
maps
pandora
screenshot
titanioum backup
zeam launcher
My biggest reasons for using a custom rom are:
tethering
adblocking
not as laggy (RFS)
screenshots
maybe a few more
I would glady give it up though if i could get some good battery life, and no bugs.
Am i better off just going back to stock jf6 and letting my phone update automatically?
Or should i try out a kh3 based rom? or just KH3 Stock?
i'm getting the best battery life from kh3. js7 is an i9000 rom that is not specifically optimized for the captivate so it may not be as good as kh3. regarding reasons for custom roms, i have all of that (except RFS) on the stock rom using these apps: adfree, screenshot er, open garden wifi tether -- all work great
Js7 is froyo.
apex is jvr gingerbread.
Both I9000 firmware.
Idk what you mean by "optimized for our device" but let me just say from personal experience that porting I9000, we don't just grab a firmware and theme it. There is coding to make it work. Plus I9000 has this thing called SOURCE CODE so that you can have a much more customizable kernel, instead of the time it takes to reverse engineer a kernel and then try to add things to it.
All in all custom roms will always be better than stock, because they take stock and improve on it. Also there is no such thing as bug free as every one uses their phone differently with different apps that may effect the phone in odd ways. You will have to just experiment and see what works best for you and your phone.
studacris said:
let me just say from personal experience that porting I9000, we don't just grab a firmware and theme it. There is coding to make it work. Plus I9000 has this thing called SOURCE CODE so that you can have a much more customizable kernel, instead of the time it takes to reverse engineer a kernel and then try to add things to it.
All in all custom roms will always be better than stock, because they take stock and improve on it. Also there is no such thing as bug free as every one uses their phone differently with different apps that may effect the phone in odd ways. You will have to just experiment and see what works best for you and your phone.
Click to expand...
Click to collapse
i don't see how a modified i9000 (J**) rom/kernel could ever have better battery life or general stability than a stock K** rom on the captivate. the way i look at it, there is a great value in having root on the phone, but not so much in having a custom rom. i just haven't stumbled on any rom that will give me a better experience than stock while at the same time keep the battery life. i've tried quite a few.
this is coming from a standpoint where battery life and stability are a priority
My captivate shuts itself down randomly on standby. Does anyone else have this problem and is there a known solution?
Are you overclocking your phone? That is one possibility. The other could be a dying battery. Does that happen even if phone is connected to charger? If yes then your battery might be okay.
What rom are you using? Is it a stock or a custom one? If you are running any not so stable version of custom rom then that could be another possibility.
uhm said:
Are you overclocking your phone? That is one possibility. The other could be a dying battery. Does that happen even if phone is connected to charger? If yes then your battery might be okay.
What rom are you using? Is it a stock or a custom one? If you are running any not so stable version of custom rom then that could be another possibility.
Click to expand...
Click to collapse
Firstly, thanks for your reply.. It was happening with the stock rom as well.. I custom flashed a Jelly Bean ROM.. Same result.. Never happened with phone connected to charger and it happens like one in 2-3 days or something..
I'm not sure if all the JB ROMs offer this in the same way, but I'm on SlimBean 2.7 with Semaphore kernel, and it allows you to change the minimum clock speed of the processor when it's in standby and the voltages it uses at different speeds. These are under the main settings->performance. Others have reported that setting the minimum clock speed to 200MHz rather than 100, or slightly upping the voltage when it's in sleep mode, can cure these sleep death issues. I've never had the problem, but search the development forum and you should find other people's recommended settings.
Captivate shuts down in standby
My phone does the same thing. It's a Captivate running Jelly Bean 4.2.1 (Slim-4.2.1.Beta.1-OFFICIAL) on a Semaphore kernel. It works perfectly when it's plugged into a computer through USB. Otherwise, it shuts down, or restarts, every single time it goes into standby, even when it's on a charger. I've tried raising the CPU speed, uninstalling SetCPU, re flashing the ROM, and nothing helps.
Is this a hardware issue, app issues, or does it have to do with the ROM or kernel? I had CyanogenMod 10.0 with a devil kernel running on it previously, and it did the same thing.