Develop Bugs

What is the best battery saving kernel?

ok well im running the stock rom and JT_Rom beta 2.0 and im testing out other
ROMs such as calkulins evio 2 and others.
but is kingxkernel bfs 4? the best?
i need something really good. overclock?
i want to have the best battery life.
how can i do this?

yes
i would likke to know the sam ething
I am running CM6 and would like to use the best battery saving kernel!!

I am having great results with King's #11 CFS

Really good battery life? I'm just starting to use kings CFS #9.
Sent From My HTC EVO

King's #11 CFS has been running fantastic for me. I am using the Azarel v2.3 ROM with it. Strangely enough, the first time I loaded Kings with Azarel, the phone was super laggy. I gave it a reboot or two and now it rocks. I have never had good battery life, even with stock 3.29 or other ROMs and kernels. I could make it throughout the day with moderate use and have about 15% left. I have been unplugged today for six hours and have 80% left with slightly less than moderate use... Slow day.
I'm also on radio 2.15.00.09.01 and PRI 1.34 on a HW rev. 003 EVO. The 1.77 PRI dropped my signal strength here in Ocala, FL.
Of course, make sure you wipe your cache/dalvik before you flash the new kernel.
Hope this helps!

Yeah,i did so. How long til the battery life shows progress. This is the first kernel I'm testing. Kings cfs#9. How can I calibrate the battery ? I wiped the battery stats to make it better to .
Sent From My HTC EVO

Perf Test
Since battery life seems to be the biggest gripe, It would be nice to have some type of non-biased performance test / graphs for some of the ROMS and kernels.

The Common misconceptions and other useful information... post at the top of this sub-forum has great information, including manners to calibrate your battery.
The problem with testing ROMs and kernels is that everyone's phone is slightly different. Some can't over/underclock to the same degree as others' phones. Sometimes a particular kernel will cause your EVO to force close applications or have other strange problems such as rebooting.
If you search the forums, you will see that there was one person in particular that did a graph of performance testing with various ROMs and kernels.
My advice would be, if you are confident enough, to go ahead and test each of the "leading" ROMs and kernels and see which one works best for you. You can also refer to the Wiki which has ROM/kernel information available.

I wanna know how if it works best for you. I wouldn't know what to test.
Sent From My HTC EVO

Caspers25 said:
I wanna know how if it works best for you. I wouldn't know what to test.
Sent From My HTC EVO
Click to expand...
Click to collapse
Flash ROM.Flash kernel. Use a few days. Note battery life. Repeat.

Those are definitely the best steps. Personally the new 3.3 ROMs kernel is supposed to be awesome for battery. I like the Azarel and myn ROMs and have had good luck with Kings #11 and netarchy's kernels. Your mileage WILL vary which is why you should do your own testing.
bender1077 said:
Flash ROM.Flash kernel. Use a few days. Note battery life. Repeat.
Click to expand...
Click to collapse

Which netarchy kernel do you use? Link please.
Sent From My HTC EVO

When do you start to see change I'm barry life from the kernel? How long til it kicks in?
Sent From My HTC EVO

ryedunn said:
Since battery life seems to be the biggest gripe, It would be nice to have some type of non-biased performance test / graphs for some of the ROMS and kernels.
Click to expand...
Click to collapse
http://ip208-100-42-21.static.xda-developers.com/showthread.php?t=790559
battery life is priority for me. kings #6 bfs and baked snack 6 are my favorite kernels.

quocamole said:
http://ip208-100-42-21.static.xda-developers.com/showthread.php?t=790559
battery life is priority for me. kings #6 bfs and baked snack 6 are my favorite kernels.
Click to expand...
Click to collapse
Wow thank you! What's baked snack 6 url?
Sent From My HTC EVO

[Q] Radio Subsystem Issues???

I have recently noticed that one of my Evo's was draining the battery a lot faster than what I would consider normal. I started using power tutor to see where the power was being used up and it turns out that the "Radio Subsystem" was at the top of the list with like 30% or so. I ran the same type of test on my other Evo and it was no where near that. Can someone with knowledge please give me an idea on what is happening? I am running Warm TwoPointTwo RLS 3 on both with King #9. All other settings have been set up the same. The only difference that I have noticed is that the newer phone is on hardware version 0004 and that is the one with the issue. Any help would be greatly appreciated.

According to Sprint revision 0004 phones have slightly different hardware, namely a different camera. It is possible that the radio received a tweak as well. Try flashing the stock kernel from the 3.30 software version to see if this fixes the issue.

sk63 said:
According to Sprint revision 0004 phones have slightly different hardware, namely a different camera. It is possible that the radio received a tweak as well. Try flashing the stock kernel from the 3.30 software version to see if this fixes the issue.
Click to expand...
Click to collapse
Thank you very much for the information. I actually downloaded the HTC #10 kernel last night with that in mind, but figured I would ask around and see what was brought up. I thank you for your reply and advice. I am going to flash the stock kernel tonight and post a follow up in a few days.

[Q] A couple of newbie Evo questions (Sorry!)

I bought an Evo yesterday and when I did I did not expect there to be so much dev support for it (seriously, I'm coming from a G2 and a MyTouch Slide on T-Mobile, your development section is overwhelming!). Don't get me wrong, I'm a happy guy, but I've been reading that there's differences between "old" evos and "new" evos and I don't want to screw anything up my second day owning this amazing phone.
So, here's me questions.
1. Is there a best root method? I see some that require adb, which I can use if I have to and the unrevoked method which seems a whole lot more simple.
2. What is the best rom/kernal combos for performance and battery life? I know, people like what they like and this will be all opinion, so I don't expect there to be one big answer.
Thanks for any help. This phone is ridiculously awesome and I can't wait to play more with it.
Also, if it helps:
Android
2.2
Baseband
2.15.00.11.19
Kernel
2.6.32.17-gee557fd
[email protected] #15
Build Number
3.70.651.1 CL294884 release-keys
Software Number
3.70.651.1
PRI
1.90_003
PRL
60674

AbsolutZeroGI said:
I bought an Evo yesterday and when I did I did not expect there to be so much dev support for it (seriously, I'm coming from a G2 and a MyTouch Slide on T-Mobile, your development section is overwhelming!). Don't get me wrong, I'm a happy guy, but I've been reading that there's differences between "old" evos and "new" evos and I don't want to screw anything up my second day owning this amazing phone.
So, here's me questions.
1. Is there a best root method? I see some that require adb, which I can use if I have to and the unrevoked method which seems a whole lot more simple.
Unrevoked is going to be easier and less involved then adb if you don't feel comfortable.
2. What is the best rom/kernal combos for performance and battery life? I know, people like what they like and this will be all opinion, so I don't expect there to be one big answer.
I am a fan of AOSP roms as they don't contain as much 'bloat' and i experience better battery life. That being said there are a few sense roms that I had an awesome experience with the most recent being Frost ROM
Thanks for any help. This phone is ridiculously awesome and I can't wait to play more with it.
Also, if it helps:
Android
2.2
Baseband
2.15.00.11.19
Kernel
2.6.32.17-gee557fd
[email protected] #15
Build Number
3.70.651.1 CL294884 release-keys
Software Number
3.70.651.1
PRI
1.90_003
PRL
60674
Click to expand...
Click to collapse
I gave my opinions in bold above.
It will help others if you give them the hardware version you are running as well

[email protected] said:
I gave my opinions in bold above.
It will help others if you give them the hardware version you are running as well
Click to expand...
Click to collapse
I saw someone saying Frost ROM was pretty good in another thread, that with CM, MIUI and Myn are the 4 roms I'm going to try first. I'm more concerned with kernals/radios that play nicely with them, though. I've gotten 8 hours out of my battery so far (unplugged at 11am, it's 7:18pm here and my battery is at 46%) so I think that with a good ROM/kernal/radio/etc combo I won't have to spend money on a larger battery.
Hardware version
0004
(and while I'm screwing around)
radio
2.15.00.11.19
what's the difference between hardware versions? is it the same hardware, just manufactured more recently or are there tangible updates?
Also, you say unrevoked is the best way to root, but the guide in the general section says I can't use it with hboot 2.04 or 2.10...well I have 2.10.0001 so I guess it's adb for me lol.

Some late hardware 3 and hardware 4 have a different camera chip. I believe this is the only difference.
So that makes some kernals not play nice but most recent ones have wrapped up that wailing issue
Swyped from a galaxy far far away......

Jimdog420 said:
Some late hardware 3 and hardware 4 have a different camera chip. I believe this is the only difference.
So that makes some kernals not play nice but most recent ones have wrapped up that wailing issue
Swyped from a galaxy far far away......
Click to expand...
Click to collapse
So before I root, I should find a kernal and ROM that work well with 4 hardware? Shouldn't be too hard, right? lol.

You can root whenever you want, and you can switch ROMs all you want (you just have to setup your phone again every time). You can even try different kernels whenever, but you really need to run them for a few days to get a feel for how they work.
I personally use VaelPak because it's Sense-compatible but has all the Sense stuff stripped out, and it's really fast and smooth. I've had zero problems with it. I used to use KingX's kernel (#11 BFS mostly) and it gave me fantastic battery life, but I also lucked out and got a phone that has always had good battery life even out of the box. It could also be partly my usage habits, and yours will make a difference for you as well. I just switched to Netarchy's 4.1.9.1 with SBC because it was recommended with the new version of VaelPak, but I'm not so sure I want the SBC thing. The whole trickle charging issue is still a bit fuzzy, and exploding phones aren't my cup of tea.
You're going to get all sorts of recommendations for ROMs and kernels, because it's really different for everybody. Sometimes one phone will behave differently than another even with the same ROM and kernel. Sometimes even the same hardware version. Just try some out.
Maybe a dichotomous key would help: Do you like/want Sense? If yes, focus on Myn's, MikFroyo, Fresh, or the other current and actively-developed Sense ROMs. If no, check out VaelPak or, if you want an actual AOSP experience, CM6 or Evervolv. And so forth.
As for kernels, find a ROM you like and then browse through the threads to see what people are liking for that ROM. If you don't like one, try another one until you do. Battery life takes a while to really gauge, especially if you don't wipe your battery stats and recalibrate every once in a while.
As far as I know all of that is generally accurate. And one more thing: ALWAYS HAVE A NANDROID BACKUP!!! Safety first.

[Q] MIUI Question

whats the best kernel to use with miui v1.2.11 any suggestions from anyone would be appreciated also could you include a link if possible if not i will use the search thank you

I'm still on 1.1.28, using savage 1.6. Best kernel I have ever flashed by far.

Does the front camera work with that kernel ?

Not sure, I've got the MIUI cam with no FFC. I'm pretty sure it will work with the CM cam app.

well i guess there isnt any working links to the v1.6

You may not find the exact one, but this is the link to the Savaged-Zen Kernels.
http://mirror.munkibizness.com/

h_townesp785 said:
well i guess there isnt any working links to the v1.6
Click to expand...
Click to collapse
This is the cfs-sbc version http://db.tt/XIeVavc

ok i got another question what is the difference between sbc and nosbc sorry if this is noob question just makin sure because reading reviews and they say that sbc can cause problems with hardware and batteries

h_townesp785 said:
ok i got another question what is the difference between sbc and nosbc sorry if this is noob question just makin sure because reading reviews and they say that sbc can cause problems with hardware and batteries
Click to expand...
Click to collapse
I believe SBC is a trickle charge. It does not have the instant battery % drop when you pull it off of the charger. Some people say it hurts your battery, but I've been using them for, I believe, over two months and I have had no problems.

A lot of people have had good luck with sbc but there have been some casualties. Nobody reported a single battery death until sbc kernels were introduced and within days there were I think like 14 or 15 people whose batteries died and the common factor between all of them- sbc. That being said, there hasn't been any reports like that for a while now, so maybe the devs have figured out how to make them safer. I don't follow the sbc kernel threads so that's just a guess.
Not trying to turn this into an sbc/no sbc debate, just trying to give OP a heads up.

[Q] SBC kernel shenanigans, easy question.

I see devs promoting SBC kernels and quite a few users raving about their SBC kernels, but aren't they supposed to hurt your phone's battery big time? Are they just ignorant or how is that people are still using SBC kernels despite the known, proven facts of how harmful they are? Am I missing something?

Most people have no issues with SBC kernels. Most of the controversy that was brewed up by some people has passed, and they're pretty well accepted now. The main concern with SBC is that it can lessen the number of charges you get out of your battery. Given the price of new batteries, most users - myself included - choose the extra hours now over the possibility the battery will poop out later.
I get much better battery life on SBC, and it's worth it to me. If you're nervous about it, choose not to use them. Only a couple of phones were actually damaged, and that was when they first came out.

What do you suggest I use, as far as a good ROM/kernel setup? Or even just kernel?

I've been using an SBC kernel for about 4 months now with no ill side effects. I test my battery regularly on our machine at work just to make sure, still good.

empiire said:
What do you suggest I use, as far as a good ROM/kernel setup? Or even just kernel?
Click to expand...
Click to collapse
Personally recommend CM7 with the Tiamat Kernel.
Sunsparc said:
I've been using an SBC kernel for about 4 months now with no ill side effects. I test my battery regularly on our machine at work just to make sure, still good.
Click to expand...
Click to collapse
Experiencing any lag? And at least you have no problems.

teh roxxorz said:
Personally recommend CM7 with the Tiamat Kernel.
Experiencing any lag? And at least you have no problems.
Click to expand...
Click to collapse
Nope, no lag. Both Sense and AOSP SBC kernels have performed well for me.

Sunsparc said:
Nope, no lag. Both Sense and AOSP SBC kernels have performed well for me.
Click to expand...
Click to collapse
Nice, I just ask cuz most complain of the wake lag, or it stalls every now and then.

teh roxxorz said:
Nice, I just ask cuz most complain of the wake lag, or it stalls every now and then.
Click to expand...
Click to collapse
I didn't notice lag on the Sense rom/SBC kernel combo I played with recently, but it would stall more often than I remember with any other kernel I've used and the phone would automatically do a hot restart to get itself going again. I also noticed my phone would run much hotter than usual. It would often go over 100 F just sitting on the table while doing nothing.
Some people swear by SBC, though. I'll pass on it.