Kernels - EVO 4G Q&A, Help & Troubleshooting

There's a lot of kernels emphazing in battery conservation, my question is, are their any kernels where the performance is the objective, like speed and smoothness?
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LoveisPeace2012 said:
There's a lot of kernels emphazing in battery conservation, my question is, are their any kernels where the performance is the objective, like speed and smoothness?
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For sense roms try out netarchys/toast kernel bfs with out havs, for aosp you could try snap turbo its super fast on cm6.
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Edit; I forgot to add make sure if you have the new 0004 hardware like I do make sure the kernel supports the camera driver or it won't work.

LoveisPeace2012 said:
There's a lot of kernels emphazing in battery conservation, my question is, are their any kernels where the performance is the objective, like speed and smoothness?
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They are all built for what you ask for. The battery thing your seeing a lot of is just an add benefit for the already built kernels. I use Netarchy's 4.2 kernels as they seem to be best for speed and battery.

dirkyd3rk said:
For sense roms try out netarchys/toast kernel bfs with out havs, for aosp you could try snap turbo its super fast on cm6.
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Edit; I forgot to add make sure if you have the new 0004 hardware like I do make sure the kernel supports the camera driver or it won't work.
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Yes I actually do have the new 0004 evolution, does this mean the camera wont work?
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LoveisPeace2012 said:
Yes I actually do have the new 0004 evolution, does this mean the camera wont work?
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You can use Netarchy's beta 4.3 and your camera will be fine. You can get the stock HTC kernel #15 with that SBC battery bit. Your choice. I think you would like Net's 4.3 IMO.

chogardjr said:
You can use Netarchy's beta 4.3 and your camera will be fine. You can get the stock HTC kernel #15 with that SBC battery bit. Your choice. I think you would like Net's 4.3 IMO.
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I went to the netarchy thread but there's like ten different 4.3 versions (SBC, no SBC bfs, SBC cfs) what would be the smoothest?
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I'm 0004 also my phone happen to like his cfs kernels I'm using the less havs with sbc must say battery life is getting better. The first few days are horrible with battery life but it adjust to your usage.
LoveisPeace2012 said:
I went to the netarchy thread but there's like ten different 4.3 versions (SBC, no SBC bfs, SBC cfs) what would be the smoothest?
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Swyped From Eva Running Myn's RLS4.95 or My Rom!

I suggest to start out with Net's netarchytoastmod-4.3-cfs-nohavs-noUV-nosbc-universal (No Undervolting).
This is always the best way to start off. No undervolting, no havs, and CFS usually plays nicer than BFS with most evos.
Use for a few days, and then try the less aggressive UV kernel to see the comparison to nohavs.
Then use that a few days and try the aggressive UV kernel to see how your device likes it.
Then ... you get the idea!
Only way to find what works best for your device is trial and error.
Have fun!
ps. I am still using the CFS-noUV-noHAVS-noSBC with great results. No need for me to undervolt.

yeah its all trial and error... what will work for your evo might not work for mine and so on.
Check out my guide, it may help you out.
http://forum.xda-developers.com/showthread.php?t=894880

Related

If my phone seems alright to me, is it worth flashing a new kernel?

I dont have any complaints with my phone. Im running htc kernel #17 and myn's warm2.2
The phone is great to me as it sits, so is there any other features that should sway me to flashing a new kernel?
also whats the difference between HAVs and non-HAVs? Whats sbc? Dont tell me to search because I did and well didnt get much, only on BFS and CFS
Imo, if you like your kernel don't change it. When I find a good kernel I stick with it . Just my 2 cents
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weaselp1 said:
Imo, if you like your kernel don't change it. When I find a good kernel I stick with it . Just my 2 cents
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Thats kinda what I was thinking.. but I dont know whats out there ya know? Is there really something better out there for battery and speed versus the HTC #17? I seen alot of myn's running the stock kernel. So that could be they are happy with it, or maybe they haven't flashed anything over it yet.
Surely with all the knowledge out here, there has to be a kernel that still utilizes great battery with more speed.
Heat does effect these phones right? Like life span of the CPU, battery etc.

KingsXKlick Kernel

I just realized after installing #11 that there might be DINC specific kernels, can someone verify this for me?
Yea all kernels are device specific.
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Gahh Its Lee said:
Yea all kernels are device specific.
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thats what i thought.
I tried #6 but got a blue tine on my screen
#5 drains my pattery 2 percent every minute
Your on a sense rom? If so try out Chad's kernels. There in the dev section.
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Well I was using incROM and was having messaging issue so I'm going to retry it later this week
Right now I'm using Skyraider Athena 1.2 and i just put KingxKernel cfs #4 on
We'll see how it goes
How does Chad's compare with battery life? Basically I'm looking for the best battery life with without slowing my phone down, I'm sick of getting 4-8 hours out of my phone when there are people claiming to get 24-80 hours.
King made Sense and AOSP kernels specific the the DInc.
AOSP won't run on Sense, and vice-versa.
King's site tells you which are DInc specific, as well as whether they are AOSP or Sense.
I know I'm using the right kernel's
Even though his site is confusing as all hell, I just always here good things about his kernels so I'm trying #4 out for right now
did he stop updating his inc kernels?
Okay I'm using Ziggy now, way better haha
iTreezy said:
Okay I'm using Ziggy now, way better haha
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Also, can someone please explain smartass scaling?
iTreezy said:
Also, can someone please explain smartass scaling?
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This was taken from Ziggy471's site.
well apparently I didn't do my research well enough
Thanks
+1 for Chad's kernals. Been using for over a month. Battery and performance are the best I've seen.

(Q) CM7 Battery Kernel. Which one?

Hey guys, I'm just wondering which kernel gets better battery life in CM7. I wanna try SavagedZen but I'm hesitant about the SBC. I know there are non-SBC versions though. How do those stack up?
Also, I'm using the new Destroyer ROM by Magnus, is his stock kernel any good?
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Well i think his kernel is the stock CM kernel, I personally use the Tiamat kernel and get nice battery life.
Thanks I've heard a lot of good things about SavagesZen, so I may try that. I'm still not sure if they were referring to the SBC version or not.
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I use savagedzen cfs sbc. I love it. My phone does not agree with bfs kernels.
I get good performance and battery life
swyped from my cyanogenized and gingerbreaded EVO
gmap516 said:
Thanks I've heard a lot of good things about SavagesZen, so I may try that. I'm still not sure if they were referring to the SBC version or not.
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Most likely the sbc version cuz that's all they talk about now. Though when I used the kernel I had great battery life on the non-sbc with cfs and bfs versions.
What are bfs and cfs and what's the difference between the two?
I would try the SBC kernel but I'm using a third-party insurance plan, not sprint's thing, so I'm afraid to ruin the phone using SBC kernels.
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Update: OK, so I'm using savagedzen non-SBC CFS and so far my battery life seems great. does battery life vary greatly from one ROM to another if they're using the same kernel?
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well atm i am running an evo 4g with cm7 and i just switched my kernel to savaged zen and it's running great. my phone was rebooting on its own w/ the regular cm7 kernel i think its b/c i was using setcpu and people are saying it messes up cm7.
i was also wondering if anyone knew if i can use setcpu with cm7 and savaged as the kernel or if it's possible to make profiles on the cpu settings on cm7 i saw some1 post somewhere that you can but they never explained how.
Congrats on joining the kernel-flashing world, hope it treats you well.
I run CM7, and have found that SavagedZen tends to be faster than Tiamats... it just depends on your personal opinion, experiment as much as you want (just don't flash a Sense kernel on an AOSP ROM )
If you're using SavagedZen-1.0.1 CFS HAVS noSBC (the most recent SavagedZen kernel) then you don't need to use SetCPU, the HAVS (hybrid adaptive voltage scaling) and SetCPU would work against each other. HAVS works to tone down your CPU as needed and such.
To change your governor (the thing that manages your CPU), go to Settings - CyanogenMod settings - Performance - CPU settings.
Oh, and CFS stands for "Completely Fair Scheduler". It means that it doesn't let one program use up the a huge chunk of the CPU. It is good for an overall system and is supposed to have better battery life. BFS stands for "Brain F*** Scheduler. It gives the priority to foreground tasks. Think about gaming and whatever demanding programs you may use.
I use both, but the most commonly downloaded one is CFS (at least for SavagedZen)
Here's a link to explain kernels, this guy does a great job of explaining: http://forum.xda-developers.com/showthread.php?t=894880
twiz0r said:
I use savagedzen cfs sbc. I love it. My phone does not agree with bfs kernels.
I get good performance and battery life
swyped from my cyanogenized and gingerbreaded EVO
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SavagedZen, hands down. No competition. My phone hates BFS kernels too....
so right now im running the savage zen bfs kernel. if i want to switch to the cfs kernel do i have to do a full wipe or just a cache and dalvik?
gilbydakid said:
so right now im running the savage zen bfs kernel. if i want to switch to the cfs kernel do i have to do a full wipe or just a cache and dalvik?
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I would recommend the Tiamat kernel personally.
Also, just make a backup, and just wipe the cache and dalvik, then flash.
teh roxxorz said:
I would recommend the Tiamat kernel personally.
Also, just make a backup, and just wipe the cache and dalvik, then flash.
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thanx for the info.
ill give the bfs and the tiamat kernel a shot. i feel like im turning into a flash whore. lol
gilbydakid said:
thanx for the info.
ill give the bfs and the tiamat kernel a shot. i feel like im turning into a flash whore. lol
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Lol naw, you're just experimenting. Trying not to get bored right now cuz I don't have my evo >>.
I've mainly used Tiamat. Running the current version right now...3.3.3 no SBC. It seems responsive and I'm getting pretty good battery life. I will have to try SavagedZen sooner or later to see how it stacks up.
BFS kernels theoretically are supposed to give you better battery life, I used the cfs sbc savage zen and it was pretty good for speed; the bfs sbc savage zen gave me the better battery life. The only thing I can say I definitely noticed about bfs/cfs is that scrolling on bfs seems to be VERY choppy compared to cfs. No matter what profile you use on bfs the scrolling was still super choppy. So to confirm this I got back on cfs and scrolling overall was smooth as butter in cfs. Just to put this out there, I recently switched to the tiamat kernel and I'm seeing about a 15% battery increase (sounds like a little but that's a big deal) lol.
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So I did as suggested...
Backup
Clear cache/data
Flash Savage
But I was under the assumption that it'd only change the kernel, not the rom? So when it booted it was a stock/default flash. I restored to my backedup rom. Did I just negate the kernel flash?
solidwater said:
So I did as suggested...
Backup
Clear cache/data
Flash Savage
But I was under the assumption that it'd only change the kernel, not the rom? So when it booted it was a stock/default flash. I restored to my backedup rom. Did I just negate the kernel flash?
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Lol yes you did.
twiz0r said:
I use savagedzen cfs sbc. I love it. My phone does not agree with bfs kernels.
I get good performance and battery life
swyped from my cyanogenized and gingerbreaded EVO
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How did you get Swype to work?
LeonDuhaney said:
How did you get Swype to work?
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Swype works fine if you have beta access from the actual site. Most of the APK files of swype flying around have expired because they released another beta version not too long ago. I believe 2.29 is the latest. I could be wrong about the number.
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[Q] Best battery life kernel for Myn's Warm 2.2?

Looking for the best possible battery life kernel for Myn's Warm 2.2. I know I'm gonna use sbc, but not sure what kernel to use. I've been using AOSP and never messed looked into sense kernels.
Netarchys sbc
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ava0425 said:
Looking for the best possible battery life kernel for Myn's Warm 2.2. I know I'm gonna use sbc, but not sure what kernel to use. I've been using AOSP and never messed looked into sense kernels.
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I seem to get the best battery life out of SavagedZen 2.2.1 Great kernel.
bwbishop said:
I seem to get the best battery life out of SavagedZen 2.2.1 Great kernel.
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Savagezen is a aosp kernal it won't work with sense roms
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[Q] What's the best GB aosp kernel for battery?

I'm having major battery drain with the latest CM7 stable release. I've lost 25% in standby in about 90 minutes....my phone was charged while off to 100% last night, and when I turned it on I left it alone....didn't even turn the screen on. when I came back an hour later it was at 78%
Can someone please recommend a good battery saving kernel, please....I'm pulling my hair out finding one. For such a popular phone the choices seems really sparse
Every phone handles kernels differently but one of the best ones so far on my phone is here.
http://forum.xda-developers.com/showthread.php?t=1546878
[KERNEL][WIP] Mason kernel for supersonic v0.14
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Savaged Zen 2.2.1 bfs undervolted -50mv with sbc. Gets a little hot with sbc but it can be turned off while not charging
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smatherlee said:
Every phone handles kernels differently but one of the best ones so far on my phone is here.
http://forum.xda-developers.com/showthread.php?t=1546878
[KERNEL][WIP] Mason kernel for supersonic v0.14
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+1 and you can undervolt with this kernel as well, I have it set at -50mv running an AOSP rom with COD tweaks and i'm at 17hrs with 78% battery left
Mason kernel
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BigSmoke53 said:
Mason kernel
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+1
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Wish I still had my EVO to give this a shot with cm7. I miss cm roms. Someday soon I hope I will be reunited with them
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smatherlee said:
Every phone handles kernels differently but one of the best ones so far on my phone is here.
http://forum.xda-developers.com/showthread.php?t=1546878
[KERNEL][WIP] Mason kernel for supersonic v0.14
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I agree with this kernel. I use SBC as well, it will stop the 10% drop in battery whenever you unplug it.
Thanks for all the wonderful responses, everyone!! I'm giving mason a shot first, since it seems so popular
I'm trying Mason G - v0.14 sbc uc'd to 729mhz, powersave gov....but I can't find any options to uv/ov. Does set cpu not work properly with this kernel? What app/script should I be using?
for undervolt if it is sysfs HAVS enabled you need to get vipermod. If it just says undervolt then it may have a pre-set undervolt determined by the dev.
hp420 said:
Thanks for all the wonderful responses, everyone!! I'm giving mason a shot first, since it seems so popular
I'm trying Mason G - v0.14 sbc uc'd to 729mhz, powersave gov....but I can't find any options to uv/ov. Does set cpu not work properly with this kernel? What app/script should I be using?
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Search vipermod script. Download it, flash in recovery, then run command in terminal then chose voltages
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vipermod...gotcha!! Thanks guys
Isn't set CPU for sense Roms? Go get Rom toolbox and it does it all.
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BigSmoke53 said:
Isn't set CPU for sense Roms? Go get Rom toolbox and it does it all.
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I've been using setCPU for my xperia & neXus for over a year each I'll try romtoolbox, though...thanks!
BigSmoke53 said:
Isn't set CPU for sense Roms? Go get Rom toolbox and it does it all.
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I'm using setcpu right now with CM7, Tiamat kernel. Phone was fully charged early this morning, and is still at 86% battery charge, but I've used it for less than half an hour, and I also use Juice Defender.
BigSmoke53 said:
Isn't set CPU for sense Roms? Go get Rom toolbox and it does it all.
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Setcpu works with anything, sense or not
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Evocm7 said:
Savaged Zen 2.2.1 bfs undervolted -50mv with sbc. Gets a little hot with sbc but it can be turned off while not charging
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On GB is was running this same setup and my battery life was nothing short of amazing. I had a good 15-24 hours depending on use.
best cm7 kernel?
i just recently started using mason. its pretty awesome. before that i used tiamat sbc also no problems. just try which ever ones you think you may like every couple days to see which one works best for you. i also give the kernel about 10 minutes to bake in every time before i unlock it. i dont know if thats been proven to help but it cant hurt and seems to work well for me.
I've been running mason sbc for about a week now. I had to use a combination of vipermod and smurfed out scripts to get the kernel set where I wanted it. I noticed the kernel was set for BFS by default, which I've never been a big fan of, due to its power consumption....so smurfed out let me set the scheduler to CFS, which is much more conservative and doesn't sacrifice any i/o speed, imho. Then I used vipermod to uv -25MHz so it wasn't such a battery-hog. Underclocked, undervolted, and set to CFS seems to be my winning combo!!! I get no less than 3 hours of constant screen time (streaming video, browsing the web, etc.) and enough standby to last me all day so I don't have to carry my charger with me anymore.
With every other android I've ever owned, setcpu does everything I've mentioned changing in this post...so when it wasn't working, I had no idea what to do.
Thanks so much guys!!! I couldn't have done it without all your help....HTC is in a world all its own in the android scene since they use so many different things that no other manufacturers do. It made me want to pull my hair out until you guys came along to help me out

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