Phone constantly rebooting after custom ROM/kernel? - Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot

I am using the Sacs rom with Ktoonsez kernel on my S4 and after about a day it's constantly rebooting. I notice it does it sometimes at idle but most of the time it's when I turn the screen off and back on again, it will stay black for about a minute or so and then just reboot.

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No power response

When I hit the power button nothing happens. This does not happen all the time. I normally have to pull batt and reboot to get anything. I am rooted,running Jt SC and Geeknik 4.4.1 kernel. I have tried multipliable roms and kernels....like I said it is only some times. I have CPU set at 400max/200min screen off. I was having problems with min set at 100. Also set cpu does not auto detect after reboots. Yesterday it was not waking up after calls and had to pull batt also. I have not installed voodoo, only non kernels. Went back to stock last night and rerooted and installed everything new this morning. Any help....very frustrated with this phone. Any help would be great. I am coming from a D1.
Bump....for the night shift.
cleskers said:
When I hit the power button nothing happens. This does not happen all the time. I normally have to pull batt and reboot to get anything. I am rooted,running Jt SC and Geeknik 4.4.1 kernel. I have tried multipliable roms and kernels....like I said it is only some times. I have CPU set at 400max/200min screen off. I was having problems with min set at 100. Also set cpu does not auto detect after reboots. Yesterday it was not waking up after calls and had to pull batt also. I have not installed voodoo, only non kernels. Went back to stock last night and rerooted and installed everything new this morning. Any help....very frustrated with this phone. Any help would be great. I am coming from a D1.
Click to expand...
Click to collapse
Don't set profiles in SetCPU. The Fascinate doesn't like them, for some reason.
Thanks. Haven't had it happen again today after I did fix permissions. Any idea why it's not auto detecting the kernel?
Sent from my SCH-I500

[Q] booty loops

So it seems that my phone might be reaching the end of line. Whenever the phone starts to get warm it starts boot looping.
A Few Examples:
Talk on the phone for 10-15 minutes, as soon as the screen comes on after i hang up, boot loops.
While streaming music for a while and turn the screen on and start using the browser, boot loops.
Tethering and doing anything with screen on, boot loops.
playing any game for a short time, boot loops.
hulu plus for a couple mins, boot loops.
In order to get it to stop I just pull the battery let it cool off for a couple minutes and let it boot up like normal. I have never had it reboot while the screen was off. It also happens in any rom/kernel combination I have used. It also happens with my stock battery and the Anker battery that I have. Any opinions? Tips?
Gm0n3y said:
So it seems that my phone might be reaching the end of line. Whenever the phone starts to get warm it starts boot looping.
It also happens in any rom/kernel combination I have used. It also happens with my stock battery and the Anker battery that I have. Any opinions? Tips?
Click to expand...
Click to collapse
What ROM/Kernel combinations you using for example?
What's your flashing process, you doing dirty or clean flashes? Also any apps recently d/l'd?
Any over/underclocking. Same for voltages?
How old are your batteries, both stock and anker?
Gm0n3y said:
So it seems that my phone might be reaching the end of line. Whenever the phone starts to get warm it starts boot looping.
A Few Examples:
Talk on the phone for 10-15 minutes, as soon as the screen comes on after i hang up, boot loops.
While streaming music for a while and turn the screen on and start using the browser, boot loops.
Tethering and doing anything with screen on, boot loops.
playing any game for a short time, boot loops.
hulu plus for a couple mins, boot loops.
In order to get it to stop I just pull the battery let it cool off for a couple minutes and let it boot up like normal. I have never had it reboot while the screen was off. It also happens in any rom/kernel combination I have used. It also happens with my stock battery and the Anker battery that I have. Any opinions? Tips?
Click to expand...
Click to collapse
I had the same problem.
The problem was CPU halting because of too low voltage.
Fixed it by overvoltaging at the max clock via Incredicontrol.
Oem battery is 2 years old. Anker is 2 months old. Currently running v8 of digital karma, underworld kernel with stock speeds and voltages. I have never messed with voltages on my phone but I was thinking the same thing about the cpu getting unstable and needing more juice. Just don't know how similar phone and pc cpus are...
Sent from my PC36100 using xda app-developers app
Gm0n3y said:
Oem battery is 2 years old. Anker is 2 months old. Currently running v8 of digital karma, underworld kernel with stock speeds and voltages. I have never messed with voltages on my phone but I was thinking the same thing about the cpu getting unstable and needing more juice. Just don't know how similar phone and pc cpus are...
Sent from my PC36100 using xda app-developers app
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Click to collapse
If I'm not mistaken, Underworld is an undervolted kernel by default. My phone never responds well with Underworld kernels, despite which rom I try.
Try using a different kernel and see what happens. Of course, there IS the chance that your phone is reaching the end of its life. My phone is acting all wonky, too, but in much less severe annoyances.
______________________________
HTC Evo 4g
yeah underworld is undervolted. I upped the voltages to the stock setting outlined in the underworld thread.. Same problems. It happened on ics roms also with mason kernel and the prelude drew kernel. Contract with sprint is up in about 2 weeks ill just wait it out and stop tethering for coworkers, that should keep the heat down lol.
Might be am idea to check how many processes are running in the background too. I know Android is set to run better with ram being used but sometimes I think the system can get overloaded.
I forgot did you say the reboots happen with any scheduler, governor combo too?
An enviousOG
on ics roms it happened with wheatly and smartassv2, on sense smartassv2 and ondemand. I have also noticed that it never happens when the screen is off.. I stream music alot at work and say after 2-3 hours of streaming i turn on the screen BAM reboot. I pull the battery and place the phone and battery in front of a fan for 10-15 seconds and it boots up and runs like nothing had happened for another 2-3 hours or even the rest of the day.
edit: Also I made it reboot after 10 minutes of streaming extreme quality on spotify app. I was happy it played without skipping with the terrible 4g connection i get at work! LOL oh well 2 more weeks til upgrade.
Maybe try to increase the min values of both the cpu and if you can the voltages for the kernel, since it seems to be happening when trying to wake the phone. Might be an idea to try increasing all voltages as well
Gm0n3y said:
So it seems that my phone might be reaching the end of line. Whenever the phone starts to get warm it starts boot looping.
A Few Examples:
Talk on the phone for 10-15 minutes, as soon as the screen comes on after i hang up, boot loops.
While streaming music for a while and turn the screen on and start using the browser, boot loops.
Tethering and doing anything with screen on, boot loops.
playing any game for a short time, boot loops.
hulu plus for a couple mins, boot loops.
In order to get it to stop I just pull the battery let it cool off for a couple minutes and let it boot up like normal. I have never had it reboot while the screen was off. It also happens in any rom/kernel combination I have used. It also happens with my stock battery and the Anker battery that I have. Any opinions? Tips?
Click to expand...
Click to collapse
I would just wipe EVERYTHING. Make sure to do a nandroid backup, and wipe the crap out of that thing. Partition your SD card, triple wipe data, dalvik, and cache. Then re-flash your rom, or try another kernal.

[Q] Phone extremely hot during idle, wifi can't turn on

Yesterday, I left my phone in my bag with my mobile data on, and when I took it out it was EXTREMELY hot, so I took it out, cooled it down and charged it, however, while charging it, it was overheating alot, and the battery took 8 hours to charge to 70%. Now I can't even turn my phone on because it immediately heats up, and turning on wifi makes it worse, it overheats like crazy and my wifi screen is stuck at "turning on wifi". I tried a factory reset but there was no use, I flashed another rom onto it and still same issue. Please help, rooted LG d802 with CM12 currently, was using darkobas rom when it happened.
Have you tried flashing stock rom?

I9505 weird screen and WiFi issue.

Hi, I have an I9505 and it has a weird issue where on stock ROM if the screen turns off and I turn it on again the touch stops responding and then the screen times out and WiFi disconnects.
Then I turn on screen and this time it works, WiFi turns in again and connects.
On any CM12.1 ROM the same thing happens but after the screen times out the screen cannot be turned on again and the phone reboots after 5 minutes. This keeps on happening again and again.
Please help.
One more thing I noticed is that if I keep the phone idle for a long time the battery starts draining rapidly and the device gets hot.
Bump? Anyone?
Reinstall the stock ROM and see if it does this on that ROM.

Whats the best custom kernel to run on stock oxygen os??

Is it smooth? Battery friendly? And does it help with phone overheating during gaming? Also if i do flash a custom kernel how can i switch back to stock kernel without flashing the whole rom again?
It's personal preference...
I jump between radioactive kernel and Omega Kernel about once a week. Just trying them out for a few days and I always go back to Omega.
And to flash stock kernel again just flash the latest rom update you're on.
And the gaming really depends on your screen brightness and what not. It's all personal use...like I don't game so I get 10-12 hours of Screen on time if I am constantly on my phone, or two days of use with about 5-6 hours screen on time. This is with BOTH KERNELS.
If you have sync on all the time that kills battery, wifi, gps, and data, they all kill battery of left on. It's all up to you. I love the pull down toggles and use them violently. My girlfriend laughs at me all the time. Cause when I'm inside? Wifi on, data off. I go outside? Wifi off, data on. GPS is only on when I need it.
Like I said, all up to how greedy you are with your own battery life.
Good luck!

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