Reverting or downgrading a kernel? - EVO 4G General

I'm happily running EViO 1.8 with the modded #15 kernel, but want to try out Net's and Ziggys. Is there a package based way to revert to the stock kernel if I don't like them or is it only via restoring the nandroid image of /system and /boot?

Calkulin has made his ROMs (current and prior) and the kernel used in 1.8 available here.
Prior ROM Versions
droidbird said:
I'm happily running EViO 1.8 with the modded #15 kernel, but want to try out Net's and Ziggys. Is there a package based way to revert to the stock kernel if I don't like them or is it only via restoring the nandroid image of /system and /boot?
Click to expand...
Click to collapse

Thanks nviron, that was exactly what I was looking for. I do wish there was a native package manager so you could be sure you removed all the trailings from a previous kernel or package before installing another.
Think RPM or .ipk

Just remember to clear dalvik cache (and or other cache?) between flashes and you should be good.
Also, be aware of some issues with some kernels. For example, with net's 4.3.x, I had to power the device down after the first boot, power it back up with power/vol-down, and wipe dalvik cache again. Otherwise, it hard locks for some reason. Once this is done, however, it works flawlessly.

Yeah, but where is the fun in that?? lol J/K
Wait, I have an idea!
Code:
# apt-get remove htc-sense
droidbird said:
Thanks nviron, that was exactly what I was looking for. I do wish there was a native package manager so you could be sure you removed all the trailings from a previous kernel or package before installing another.
Think RPM or .ipk
Click to expand...
Click to collapse

nivron,
I just noticed your sig, that is exactly the setup I'm considering, Ziggy's 1/21 kernel, how do you like it for:
a) performance?
b) battery life?
c) compared to net's 4.3.1 havs nosbc?

A. Excellent
B. Excellent (with -100uv script)
C. Comparable so far, but haven't had the combo running long enough to give you a definite answer. ROM and kernel combos require a break-in period.
droidbird said:
nivron,
I just noticed your sig, that is exactly the setup I'm considering, Ziggy's 1/21 kernel, how do you like it for:
a) performance?
b) battery life?
c) compared to net's 4.3.1 havs nosbc?
Click to expand...
Click to collapse
Sent from my PC36100 using XDA App

I've been running Ziggy's 1/21 for a few hours now and it seems pretty stable and performance seems decent. I'm considering dropping the battery saver scripts and going to smartass as conservative has a bit of ramp-up time between when you start doing something and when the governor gets your CPU speed up to match. Also, I like the idea of smartass handling the screen state in the governor instead of a script.
__
EVO 0004, EViO 1.8, Ziggy's 1/21, Conservative battery saver, ADW.Launcher

Related

Ziggys Kernels

Well I was looking for a new kernel the other day. I was getting tired of the lag of kingklicks kernels for gps. No offense king, Ive used your kernels since day one of my inc. So I went searching for a new kernel and tried out ziggys outrageous 1.28 lightspeed kernel which turned out to b false (really 1.15, somebody lied to him bout the code). Well on Oct 26th he came out with his new BFS kernel of the source code 2.6.32.24 with being overclock to 1.19. He uses this for bfs which king is still using 2.6.32.15. So far as using it no lag on gps and still get the same quadrant(1680) and linpack(40.223) as kings BFS. If you looking to try a new kernel heres the link. I hope ziggy471 dont mind but mad props to him.
http://www.ziggy471.com/2010/10/26/ziggy471-incredibleincredible-aospevobravo-kernels-updated-26-oct/
Thanks for the word sir.
Sent from my ADR6300 using XDA App
thisguy23 said:
Thanks for the word sir.
Sent from my ADR6300 using XDA App
Click to expand...
Click to collapse
No problem. Im always looking for new kernels and other mods.
did you download the AOSP kerenel or the other one? whats the diff? i downloaded both and they kept on making my phone freez so i went back to hydrakernel.
Dinc User said:
did you download the AOSP kerenel or the other one? whats the diff? i downloaded both and they kept on making my phone freez so i went back to hydrakernel.
Click to expand...
Click to collapse
I have used it on skyraider 3.3.2 now for the last 3 days with exceptional responsiveness and exceptional battery life. I heard people use the AOSP kernel for cyanogenmod and it has been worthy for them too. Difference is AOSP is for people who dont use SENSE UI in the rom. What rom are you using? Also did you clear dalvik cache and regular cache for. I downloaded the non-AOSP.
You can't be using one or the other kernel, either your running an AOSP rom or a Sense rom. That right there tells you which kernel to choose.
shoman24v said:
You can't be using one or the other kernel, either your running an AOSP rom or a Sense rom. That right there tells you which kernel to choose.
Click to expand...
Click to collapse
I hope this is in reference to the comment above my last one. Cuz I do know what kernel and rom Im running. I use the non-AOSP cuz my sense ui is still intact. NON_VANILLA
This is BFS with HAVS correct? How is the battery life/responsiveness?
Battery life is excellent, best I have had. Quadrant has been in the 1400's consistently (overclocked to 1.113), as apposed to others that are in the 1100-1200 range (including king's) with random moments of greatness into 1400.
Panda Fuzz said:
Battery life is excellent, best I have had. Quadrant has been in the 1400's consistently (overclocked to 1.113), as apposed to others that are in the 1100-1200 range (including king's) with random moments of greatness into 1400.
Click to expand...
Click to collapse
Does it lag at all though? I installed King's CFS on CM 6.0.2 and it lagged alot. The 6.1rc2 kernel is very snappy
Nope, no lag. Just a good kernel. I am actually very pleased considering I have suffered with others.
After about 20 or so hours my phone has to be restarted, for some reason there is lag that occurs that can only be fixed with a reboot.
I've had this happen with other kernels too
shoman24v said:
After about 20 or so hours my phone has to be restarted, for some reason there is lag that occurs that can only be fixed with a reboot.
I've had this happen with other kernels too
Click to expand...
Click to collapse
This is why I stopped using Kings kernals, phone gets stuck at 100% cpu and needs to be reset.
That sucks this kernal does the same.
I just wiped Dalvik and system cache, installed and rebooted. It's seemingly stuck on the bootscreen. How long has it taken to reboot you guys?
Up to ten minutes after wiping Dalvik cache. Hang tight!
It's probably the BFS scheduler... even though the bfs faq says it's good to use in phones.. lol
http://ck.kolivas.org/patches/bfs/bfs-faq.txt
I wonder if our phones would benefit from a higher tickrate when using bfs..
james_pnut said:
I have used it on skyraider 3.3.2 now for the last 3 days with exceptional responsiveness and exceptional battery life. I heard people use the AOSP kernel for cyanogenmod and it has been worthy for them too. Difference is AOSP is for people who dont use SENSE UI in the rom. What rom are you using? Also did you clear dalvik cache and regular cache for. I downloaded the non-AOSP.
Click to expand...
Click to collapse
I use the same ROM 3.3.2 as you. I downloaded the non-aosp version of ziggy's kernal. I wiped my cache and dalvik...but no luck with this kernal. My phone just keeps rebooting. See my signature line below and tell me what is different from your setup. Are you using HBoot .92???
im using radio .07.28 and CMR 2.5.0.5 Difference in you your signature
james_pnut said:
I have used it on skyraider 3.3.2 now for the last 3 days with exceptional responsiveness and exceptional battery life. I heard people use the AOSP kernel for cyanogenmod and it has been worthy for them too. Difference is AOSP is for people who dont use SENSE UI in the rom. What rom are you using? Also did you clear dalvik cache and regular cache for. I downloaded the non-AOSP.
Click to expand...
Click to collapse
i using the stock rom, so i guess yea, im using sense ui. do i need a different rom for this kernel to work? ... and yes i did clear my dalvik and regular cache, but my phone still froze.
james_pnut said:
im using radio .07.28 and CMR 2.5.0.5 Difference in you your signature
Click to expand...
Click to collapse
Well, user "Panda Fuzz" is using this kernal okay with my radio version. Hmm.. Must be my 2.5.1.1 version of CMR. People have reported problems with SR 3.3.2 and 2.5.1.1, but not me. This will be the first problem I have encountered with it. Guess I will try going back to CMR 2.5.0.5 and give ole ziggy another shot.

[Kernel][Sense] Adrynalyne's 2.6.32.21 [Latest Version 2.0-fixed] [Updated 4-2-2011]

We are not responsible for what happens to your phone. Always make a nandroid before using.
This is Adrynalyne's first kernel for the HTC Thunderbolt
This should work with any rooted sense rom currently available, but as stated above always make a nandroid to be sure
Latest Version 2.0
-smartass is default, tweaked, etc
OldLatest Version is 1.9
-ext4 support --nfs support removed for now to cut down kernel size (wasn't loading as modules) --on demand default governor until tweaking of smartass is perfected. This will make the benchmark folks happy --tweaked smartass --other little tweaks
OldLatest Version is 1.8
-Fixed 2D rendering, improved quadrant
-1.8--removed gps+ patch because it sucked ass
OldLatest Version is 1.7
-Changed up higher end voltages
OldLatest Version is 1.6 (This does not mean overclocked to 1.6 people )
Includes:
-perflock disabled
-undervolt
-swap
-neon and cortex opt
-rndin-gpu+ patch
-conservative, interactive and smartass govenors.
-standard slots no OC
-Changed up higher end voltages
-Powersave govenor added
-Fixed 2D rendering, improved quadrant
-ext4 support --nfs support removed for now to cut down kernel size (wasn't loading as modules)
-smartass is default, tweaked, etc
Find it in RM under MrBobrowitz or download the file below
Download Adrynalyne's 2.0
Download Adrynalyne's 1.9
Download Adrynalyne's 1.8
Download Adrynalyne's ver 1.7
Download Adrynalyne's ver 1.6 Kernel
INSTALL VIA CLOCKWORK!
sweeeeeeeeeeeeeeeeeeet
very nice work here fellas very nice
and the Rom Manager was a nice touch too
I guess this means CWR doesn't have a problem with flashing kernels anymore?
Bxsteez said:
I guess this means CWR doesn't have a problem with flashing kernels anymore?
Click to expand...
Click to collapse
Was it even updated?
Been running this kernel since I grabbed it from irc. Thank you, adrynalyne. This is fantastic. And thank you, Mrbobrowitz.
Sent from my ADR6400L using XDA App
Nope. . Flash away! But don't forget your backup!
i thought clockwork was having issues flashing kernels ?
psufan5 said:
Was it even updated?
Click to expand...
Click to collapse
There is no update to my knowledge. I could be wrong.
Is there any fix to CWM breaking the ability to charge the phone while its off?
JustinD2473 said:
i thought clockwork was having issues flashing kernels ?
Click to expand...
Click to collapse
clockwork didnt really have an issue
the problem was putting together the correct zipable package
psufan5 said:
Is there any fix to CWM breaking the ability to charge the phone while its off?
Click to expand...
Click to collapse
i wish but give it time im sure kush will update and fix that while the TB is still pretty new
so if I flash this what benefits does it have? Sorry for the noob question I never flashed a kernal except for when I had a fascinate.
ckochinsky125 said:
so if I flash this what benefits does it have? Sorry for the noob question I never flashed a kernal except for when I had a fascinate.
Click to expand...
Click to collapse
the benefits are listed in the first post
and flashing good kernels are a must
DS36 said:
the benefits are listed in the first post
and flashing good kernels are a must
Click to expand...
Click to collapse
Not really, all it says is what is included and I don't know what he is talking about in what is included except undervolt.
Awesome! Just got done flashing, went smooth as silk.
Sent from my ADR6400L using XDA App
Thanks fellows.....very nice.
NO way to flash this without CWM is there lol... I dont wanna put it on because i like charging my phone when its off.
psufan5 said:
NO way to flash this without CWM is there lol... I dont wanna put it on because i like charging my phone when its off.
Click to expand...
Click to collapse
Correct me if I'm wrong, but if you're really opposed to CWM, couldn't you just unzip the package, flash the kernel with fastboot and push the file in system/lib using adb?
Anyway, Smartass governor? Wow, having had a Droid X before I feel like I've really been out of the loop. Read up on it, I like it. It's good to have a kernel that I feel I can relate to.
Still charges in cwm when off just displays cwm recovery screen if fastboot is not enabled.
Sent from my ADR6400L using XDA Premium App

GINGERBREAD Hacked/Compiled Kernels: Share your opinion/experiences/feedback

I was just curious: how is your experience with the various hacked kernels available like, for instance :CF-Root 3.0] JP*,JS*,JQ3,JV1/K - su+bb+2e/CWM - rfs+ext4 by Chainfire
Hacked Lagfix/Ext4 Samsung Galaxy S Gingerbread - JVB by supercurio
[KERNEL][GPL][SECURITY] FuguMod 3.0 (gingerbread JVB) voodoosndv7 by nikademus
DamianGTO Ultimate Ginger Kernel by DamianGto
SpeedMod Gingerbread by Hardcore
Talon Kernel by ytt3r / existz
​Do you know another one?
Tested a couple of them, pretty much satisfied with the responsiveness and battery performance, no bugs or issues, BUT UNLIKE many hacked/compiled kernel users I am always on RFS and have all tweaks disabled....(edit: not anymore, testing some tweaks right now)
In the begining running Gingerbread the sgs was having some weird battery performances, but after removing a bunch of bloatware and freezing another bunch (using Titanium app), like "software update" for instance , battery performance is stable.
Some feedback about this and the other kernels would be nice, specially from users like me, that wont do the "file convertion thing" (always on RFS).
Tks
» «
Well first i try Supercurio, Gingerbread-GT-I9000-stock-from-sources-kernel+hackskernel, and work so well. Then i try Supercurio again Gingerbread-GT-I9000-dev-kernel+hacks, and it´s a complete kernel is really a good Kernel, estable, and work so fine, and not draw the battery.
Actually i have Darkys v10.0RC5b2 rom and try DamianGTO_Ginger_Beta_6__340HZ, no good it´s unstable and with the ram don´t work good.
Now I have Ficeto Kernel, Dark Core 2.0 and really work so good with the ram and with batery, it´s very stable and it´s a complete Kernel whit lagfix and ext4.
Now I want try Dark Core 2.1 and probably the last Hardcore´s Kernel, speedmod-kernel-k15c-test5-o2-09q3-500hz, perhaps now without reboot problem.
Hmmm....I dont think your probs are kernel related but more MOD ROM related....
You missed the Hardcore's SpeedMod kernel!
From the beginning JVK and now JVB both deodexed by Ramad with CFRoot is a winning team for me.No ext-4 stuffs,or as a test...killing time...,and just happy like that.Flashing mods and themes,enjoying his CWM application,can't thank enough Chainfire for accompanying us in our wish to use this 2.3 «release».
Only one sudden battery drain as far for me and it was a google process.Maybe related to maps,read that somewhere...
MY SGS New XWJVB Problems...
1. my screen going off when im still working...or playing game...or calling with loudspeaker (check this) (when not touch)
2. always on my touch buttons lights (menu= back keys)
3. didn't play some games (restart phone and stucking) but can play that games on my older froyo firmware...
I'm using XWJVB (old i use XXJVK) with CWM3 EXT4 File Sys...... please....tell me this gingerbread releases are still beta or final releases?
I'm using CF-Root 3.1 and it works but haven't that much to compare with because I'm new in this stuff and haven't tested any other kernel.
I'm using Simple Honey 3.1 (JVB) right now with CF-Root 3.1 + EXT4 converted and wonder if I'm able to change kernel without wipe the phone? If I don't need to wipe then I may study the difference between those kernels
Great puting all up to date kernels in one list tho, that makes it easier for me and others who are curious about them.
Fugu Mod working absolutely perfect here..
olivercervera said:
You missed the Hardcore's SpeedMod kernel!
Click to expand...
Click to collapse
I didn't know Hardcore was ready with a stable kernel forGingerbread..
If you know a link with change logs and download information you can post it here and I will add it on first post.
« »
kalpik said:
Fugu Mod working absolutely perfect here..
Click to expand...
Click to collapse
Heard good things about fugu, but didnt try it yet...
And....did you try other kernels? Anyone with comparison material?
« »
I haven't had any problems on all the kernels.
It is just a matter of taste i think.
Some have other features (focus areas) then others, but in general they are all stable. Even the released developers version of supercurio.
So it seems that they all know what they are doing.
Personally i am using now the damiangto kernel for the more memory, just because i have SPD Shell 3D running and it consumes at lot of memory.
Here's my very, very executive executive summary:
- I rooted using CF-root 3.1 (not 3.0, filename was "CF-Root-XW_XEE_JVB-v3.1-CWM3RFS.tar").
I used this only to gain root and to flash CWM3-dependent patches, so I didn't get to fool much around with it. But from my light usage, I definitely didn't notice any problems.
- I've been running pretty much all JVK/JVB-revisions of supercurio's kernel so far (for the ext4 lagfix) and I can't really complain about anything. The added audio-drivers are definitely a bonus. Can't live without them now. I haven't had any issues with performance nor stability.
- Fugumod.
I'm absolutely alien to this kernel/mod and really have no experience with it. Not tried it once. That said, people has said earlier in the JVA/JVB/JVK-thread that when they rooted using Fugumod, they had issues connecting their phones to Kies afterwards. And they said a reflash of stock firmware and then using CF-Root instead solved their problems.
Unless you have some very specific reasons to go this route, it seems this is the only one with consistently confirmed problems so far and might be worth avoiding. Maybe the problems have been identified and fixed though. Not absolutely sure here.
- DamianGTO.
Absolutely alien to this one as well, but haven't seen any posts about specific issues either.
Hmmm havn't tried darkcoreGB yet...
**Simply Honey 3.0, UltimateGB beta7 kernel, JQ1 modem**
This latest DamianGTObeta7 is really nice
http://db.tt/YCn1nRc
**Simply Honey 3.0, UltimateGB beta7 kernel, JQ1 modem**
Brotuck said:
I haven't had any problems on all the kernels.
It is just a matter of taste i think.
Some have other features (focus areas) then others, but in general they are all stable. Even the released developers version of supercurio.
So it seems that they all know what they are doing.
Personally i am using now the damiangto kernel for the more memory, just because i have SPD Shell 3D running and it consumes at lot of memory.
Click to expand...
Click to collapse
Hmmm I think I can use a big memory ...so, no issues with Damian's kernel?
And since you didnt have any problems with all the kernels, let me guess:
You are always on RFS and you dont use any mod rom right?
Tks
« »
rlorange said:
This latest DamianGTObeta7 is really nice
http://db.tt/YCn1nRc
Click to expand...
Click to collapse
Define nice, pros,cons (if any) etc.
Tks
EDIT: Just noticed: Damian's XDA account is currently disabled? And somebody else edited his first post?
What's going on?
....
I was on Darky RC3 with DarkCore 2 and wasa super smooth and fast.
Then I decided to try MIUI RC6 ... run it from Friday to Sunday when I gave up:
1. camera not working
2. touch keys are iffy, sometimes they work, other times they don't
3. My 3G network kept dripping all the time
4. try to flash differnet modem broke IMEI and had to reinstall the whole ROM
5. when alarm sounds, i could not stop it unless i lock and unlock the screen
6. there is no support, for every issue I had the answer was: it's in the FAQ
So I am back on Darky 10RC5.3 and much more happier; faster, smoother, camer works, 3G is fine, i can flash any modem I want and above all the support team is fantastic.
Battery life
What about battery life? I test speedmod for 3 days and I find less battery autonomy that 2.2.1.
For a medium usage after a day it's over!!!!
Does anyone have this trouble???
Yeah Damian is no longer at xda. He is still developing tho at his own forum. Using his beta7 with no issues do far except a hot reboot after I wiped cache
Edit you can my dropbox link to gto7 to your first post if you like
**Simply Honey 3.0, UltimateGB beta7 kernel, JQ1 modem**

how to overclock and gain maximum battery and performance

Hi everyone... i have samsung galaxy S I9000 base rom JVP 2.3.4 and CWM recovery 3... its rooted can anyone suggest me how to gain maximum battery and phone performance ...
which is the best Overclocking app
and wat are the frequecy to be set
please advice me how to gain maximum phone performance and battery performance...
Thanks in advance
wondering the same thing.
could any one give detailed instruction?
maybe u should try a based rom (JVQ or JVR) and a kernel (like galaxian EE or semaphore ) + JVR modem
Use odexed JVR on latest galaxian kernel, there are good odex themes (I use EE SP1 clocked to 1.1ghz via tegrak. This is a minor OC but voltage at 1.1 is lower than standard 1.0 ghz!) remove all the crap bloatware (I remove loads of stuff and all samsung apps using sgs chlorine) use zeam launcher (fast, lightweight). Use setcpu for screen off profiles and also juice defender.finally, convert to ext4 then back again to rfs to clean file systems. Then calibrate battery, use noop scheduler. This will give you a very fast phone with great battery life
Sent using geek power
thanks a lot dude let me try will hope this works fine
gsw5700 thanks for the sugession ... but i am confused wen i check for this kernel .... http://forum.xda-developers.com/showthread.php?t=1196391
it says flash it if u have ODEXED JVR ROMS only!!! but my rom is JVP
please let me know how to go further and also let me know is the camera application is stock galaxy or hacked camera
thanks in advance
Flash odexed JVR, then you can flash this theme (that I use). Then flash chainfire 4.1 kernel to get root, then flash latest galaxian kernel. Use setcpu and juice defender to get good battery savings
Don't forget to hard reset/wipe after flashing jvr, tick to re partition, wipe both caches and fix permissions after flashing galaxian
Sent using geek power
thanks dude i have followed the procedure... let me check the performence
it gave me 16 hours of battery life .. and performance was stable
gsw5700 said:
finally, convert to ext4 then back again to rfs to clean file systems.
Click to expand...
Click to collapse
Why not just stay on ext4?
RFS will defragment after a while (depending in usage), I like to defrag file systems every month or so. I haven't actually tested it, but hope it will provide additional benefit. I also like to use it for a while whilst on ext4 to prove that ext4 doesn't feel any faster at all than rfs!!
gsw5700 said:
Use odexed JVR on latest galaxian kernel, there are good odex themes (I use EE SP1 clocked to 1.1ghz via tegrak. This is a minor OC but voltage at 1.1 is lower than standard 1.0 ghz!) remove all the crap bloatware (I remove loads of stuff and all samsung apps using sgs chlorine) use zeam launcher (fast, lightweight). Use setcpu for screen off profiles and also juice defender.finally, convert to ext4 then back again to rfs to clean file systems. Then calibrate battery, use noop scheduler. This will give you a very fast phone with great battery life
Sent using geek power
Click to expand...
Click to collapse
Thanks for those suggestions! I'll try them.
Sent from my GT-I9000 using XDA Premium App
I also suggest Galaxian. It's pretty neat.
So how long battery life do u guys get on undervolted galaxian?
Im on JVR w/ talon kernel OC'd to 1.2 and UV'd and i barely get 2 days of little use.
bufferpl said:
Why not just stay on ext4?
Click to expand...
Click to collapse
Because some kernels don't need any lagfix actived
It's not about fixing lag, that is just terribly outdated but traditional terminology.
RFS isn't slower than ext4, but the letter is still the better filesystem by it's journaling and fragmentation behavior.
In a nutshell: you don't have to convert to ext4 to have a smoother device, but you might still want to do so if you want a better file system running your device.
bufferpl said:
So how long battery life do u guys get on undervolted galaxian?
Im on JVR w/ talon kernel OC'd to 1.2 and UV'd and i barely get 2 days of little use.
Click to expand...
Click to collapse
I get about one day of medium to heavy use and a day and a half if I don't do much. I lose about 2-3% battery over night (using juice defender)
Sent using geek power
my signature tells the setup. undervolting for the lower frequencies helps. Also check out Zach/picachu's screen state scaling and system scripts. Combine with the latest talon kernel and you are set. Tegrak aop is optional for overclock above 1200
**Simply Honey 5.0 JVR, Talon kernel & Tegrak OC app [email protected]**
rlorange said:
my signature tells the setup. undervolting for the lower frequencies helps. Also check out Zach/picachu's screen state scaling and system scripts. Combine with the latest talon kernel and you are set. Tegrak aop is optional for overclock above 1200
**Simply Honey 5.0 JVR, Talon kernel & Tegrak OC app [email protected]**
Click to expand...
Click to collapse
and how much battery time do you get with that setup?

Low voltage kernels

Just rooted. Im new to the droid world, so im curious, can i get a low voltage kernel? A friend has Savage Zen and brags about battery life, but would it be compatible with my default-rooted rom? Also can i backup the kernel? Thanks.
Btw i tried googling but every time i got a good lead the links were dead
Sent from my HTC Evo 4G [rooted] Sprint 2.3.3(stock, came preinstalled) hardware v.4 bought new in July.
If you are referring to a rooted, stock HTC Sense ROM, no, do not use SavagedZen. It is only for AOSP ROMs.
AOSP - Android Open Source Project (vanilla, like on the Nexus)
Sense - HTC's UI
You cannot use a Sense kernel on an AOSP ROM, or an AOSP kernel on a Sense ROM.
(All Gingerbread)
AOSP Kernels:
Tiamat
SavagedZen
Cyanogenmod (kernel)
Godmode
PoonKang
I know that Tiamat and SavagedZen have HAVS and can be undervolted using Vipermod. Cyanogenmod, Godmode and Poonkang may come undervolted, but they do not have HAVS so you cannot adjust it.
Sense Kernels:
Freedom by Lithid
Golden Monkey by Netarchy
ChopSuey by barnacles10
Stock HTC
None of these kernels have HAVS (Freedom used to, but it was causing issues so he took it out). Golden Monkey, ChopSuey, and Freedom can come undervolted by certain degrees, it depends on which version of the kernel you download.
I can't think of any way to back up a kernel except for nandroiding system, but I am probably wrong. Just go into recovery, wipe cache and dalvik and flash a new kernel if you have any issues.
There is a good study guide in I think Q&A stickied, telling all that you need to know about kernels. I advise you to read it. Link: http://forum.xda-developers.com/showthread.php?t=894880
tropicalbrit said:
I can't think of any way to back up a kernel except for nandroiding system, but I am probably wrong. Just go into recovery, wipe cache and dalvik and flash a new kernel if you have any issues.
Click to expand...
Click to collapse
You can usually recover a bad kernel by flashing to back to the stock kernel and wiping cache and dalvik. Its usually worked for me, but depends on how much the custom kernel changed things.
To OP, go check out Kernel Manager in the market. It takes a good amount of the guesswork out of kernel flashing.
I say go with chopsuey 9.1 ill say its really good left my phone off charger for 8 hours while i slept was at 41% before and when i woke up it was still at 41% i mean does it get anybetter than that
Thanks for the help. Really in depth and helpful advice . Using freedom aggressive kernel now. Still testing to see if it helped. Great forums.
Sent from my HTC Evo 4G [rooted] Sprint 2.3.3(stock, came preinstalled) hardware v.4 bought new in July.

Categories

Resources