Develop Bugs

[Q] CM7 Battery Kernel?

I'm about to flash the CM7 RC1 ROM and would like to know, what would be the best kernel to flash with it? I looked into the Savage Kernel and the links are dead. Does Netarchy do a universal kernel that works with all roms?

Mko979 said:
Hello everyone i"m just stopping by so I can reach my 10 post limit so that I can make a post in the development section.
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You could have atleast answered his question, or made a useful post to reach it.
Anyways... the stock kernal that comes with cm7 is actually pretty good. But I use the savaged zen kernel, it gives me amazing battery life and has the smartass and savaged zen govenors tied in.

Bamba1260 said:
You could have atleast answered his question, or made a useful post to reach it.
Anyways... the stock kernal that comes with cm7 is actually pretty good. But I use the savaged zen kernel, it gives me amazing battery life and has the smartass and savaged zen govenors tied in.
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Yea I downloaded it also. Next question. Where the hell is the google addons download link? Im going crazy here with no gmail app and market!!!

knowledge561 said:
Yea I downloaded it also. Next question. Where the hell is the google addons download link? Im going crazy here with no gmail app and market!!!
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http://goo-inside.me/google-apps/latest/
I hear there is an issue with the market today and the gmail app isn't coming down right, but you can still give it a shot.

Use the stock kernel! CM team puts a lot of work into it.

strung said:
Use the stock kernel! CM team puts a lot of work into it.
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Does the stock kernel work as good as this savage one i've been hearing about?

Stratus41298 said:
Does the stock kernel work as good as this savage one i've been hearing about?
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Click to collapse
I am running CM7 with the stock kernel and so far its great. Its fast and the battery life is nice for me. You can go into Settings > CyanogenmodSettings>Performance and change the cpu setting to batterysaver as well.

Man.. first off.. give one of the Nightlies a shot. RC1 was ok for me, but i found that nightly #6 was AMAZING...
Now on to your question... like mentioned above, the one that comes with CM7 is pretty awesome. However, i find that i like the Savage-zen a little more. I am using v1.0 with CFS and SBC and it is WOOOW!!!

caleby20 said:
I am running CM7 with the stock kernel and so far its great. Its fast and the battery life is nice for me. You can go into Settings > CyanogenmodSettings>Performance and change the cpu setting to batterysaver as well.
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yeah and then your phone acts like it is dying everytime you try and do anything.
I much prefer the savaged.zen governor that is based off the smartass governor.
I usually get 2 - 2/12 days with the savaged.zen kernal with SetCPU set on this governor. Though i am about to try out not using SetCPU and using the built in settings from CM and see if they work the same and save me having SetCPU running 24/7. BTW i am running a 1750 MaH battery, same size as stock battery.

Yea I don't use that setting just letting the op know. Let me know how your testing goes. I'm going to try setcpu for the first time.
Sent from my Evo running CM7 RC1

bdoople said:
yeah and then your phone acts like it is dying everytime you try and do anything.
I much prefer the savaged.zen governor that is based off the smartass governor.
I usually get 2 - 2/12 days with the savaged.zen kernal with SetCPU set on this governor. Though i am about to try out not using SetCPU and using the built in settings from CM and see if they work the same and save me having SetCPU running 24/7. BTW i am running a 1750 MaH battery, same size as stock battery.
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Click to collapse
Which cm setting would be closest to smartass? Conservative? Ondemand?
Sent from my Evo running CM7 RC1

bdoople said:
yeah and then your phone acts like it is dying everytime you try and do anything.
I much prefer the savaged.zen governor that is based off the smartass governor.
I usually get 2 - 2/12 days with the savaged.zen kernal with SetCPU set on this governor. Though i am about to try out not using SetCPU and using the built in settings from CM and see if they work the same and save me having SetCPU running 24/7. BTW i am running a 1750 MaH battery, same size as stock battery.
Click to expand...
Click to collapse
Mind telling me what version of Savaged.Zen Kernel you are running to get this battery life? BFS or CFS?

Does anyone know if it is necessary to use profiles (ie. screen-off profile) if you're using the savagedzen governor?

anguyen2008 said:
Does anyone know if it is necessary to use profiles (ie. screen-off profile) if you're using the savagedzen governor?
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Click to collapse
You can. Alot of people say it helps alot but some say setcpu isn't helping. Try using the smartass governor and the screen off profile. That way it will underclock the CPU while screen is off. It won't hurt.
Sent from my Evo running CM7 RC1

[Q] Best kernel for MIUI

I am currently using MIUI 1.7.29 Osimood with the Tiamat 1.04 kernel, and I am wondering what the best kernel is for battery life. I am also using the V6 supercharger ram script. I am running my CPU at 960mHz at the moment, using the smartass governer. I also undervolted using vipermod, 960MHz at 950mV.
My choice consists of the latest Pershoot, UmaroKernel 1.06 or Tiamat 1.04
What differences would I see between those kernels, are they noticeable for a regular user?

Sorry man, but wehre do you find the vipermod for desire z? http://vipermod.tiamat-dev.com/faq.php it's not compatibile with desire z/g2....

Uh...what's wrong with the kernel it comes with? Can OC to 1.5GHz stock ya know. Battery life is great with it too. People always want to flash something weather it be a radio or a kernel.
Sent from my HTC Desire Z using XDA Premium App

Spastic909 said:
Uh...what's wrong with the kernel it comes with? Can OC to 1.5GHz stock ya know. Battery life is great with it too. People always want to flash something weather it be a radio or a kernel.
Sent from my HTC Desire Z using XDA Premium App
Click to expand...
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Isn't flashing stuff and trying new things basicly the point of this whole site?

ostinq said:
Isn't flashing stuff and trying new things basicly the point of this whole site?
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Click to collapse
damn straight,
1) pershoot is a sense kernel? (i am proabably wrong but i have never tried this kernel)
2) umaro kernel i found had issues with wifi, high underclock freq (leading to poorer battery life), but fun if you have the time to tweak voltages and fast!
3) tiamat kernel i found had issues with sleep of death/random reboots on wakeup couldnt test it past that. (setcpu was set to screen off was: conservative 125min -345 max and would still crash)
if you are up for another kernel, i am now using this kernel (streamline5)
no voltage tweaking (pretweaked) but it has good batt, speedy and stable cant ask for much
http://forum.androidspin.com/showthread.php/6555-Streamline5-Nightly-CM7-Test-Kernel-2.6.35.13

lalalandrus said:
damn straight,
1) pershoot is a sense kernel? (i am proabably wrong but i have never tried this kernel)
2) umaro kernel i found had issues with wifi, high underclock freq (leading to poorer battery life), but fun if you have the time to tweak voltages and fast!
3) tiamat kernel i found had issues with sleep of death/random reboots on wakeup couldnt test it past that. (setcpu was set to screen off was: conservative 125min -345 max and would still crash)
if you are up for another kernel, i am now using this kernel (streamline5)
no voltage tweaking (pretweaked) but it has good batt, speedy and stable cant ask for much
http://forum.androidspin.com/showthread.php/6555-Streamline5-Nightly-CM7-Test-Kernel-2.6.35.13
Click to expand...
Click to collapse
Pershoot is actually for non-sense roms. The downfall people have with it is lack of governors. Some don't mind, some want variety. I've had great experiences with Pershoot's kernel and it's the baseline that all others are compared to (not to mention the foundation of almost ALL G2/DZ kernels).
Umaro's just needs to have voltage tweaks done manually but on the plus side - keeping the voltages normal (not UV) allows some people to reach higher OC speeds. It keeps the processor from bottoming out due to insufficient voltage which can easily happen when you UV. The main issue is with the Greased lightening governor - it's new and still a bit buggy.
Tiamat 1.0.4 is outstanding. I can sit all day at 2+ GHz (not literally, see: Chernobyl). I personally have an issue with the interactive governor but other than that it's my favorite kernel (Umaro may take that soon, once greased lightening is perfected).
Basically you just need to try out a few and see which you like. There is no 'best'. Most kernels will work with any ROM (Sense being the only exception).

Bumping a thread that is relevant to my interests.
It's about time for me to jump ship from an outdated CM ROM and try something new like a MIUI ROM.
With that said, I'd like to read more opinions & experiences from people using the various Kernels AND how the latest radio (the one released today) is working for them. I'm just trying to get the optimal experience here
Speaking of MIUI would anyone mind telling me some differences between OsiMood's ROM compared to the official MIUI-US ROM (or even DarkSpadez ROM)?
Thanks a ton guys!

I downloaded the official rom . . .then ignored it downloaded osimood and iv been using it since. Osimood is a lighter rom, which is always a good thing, unwanted languages etc are removed for a smaller faster rom. Also he preinstalls tweaks like an adblocker and extended settings mod.
Kernal wise iv been looking for the same info as you but couldn't find it. So I eneded up trying them all:
- Eugenes streamline5 is a nice kernal, preundervolted. Only probly is its not being updated so will become redundant.
-Tiamats kernal allows over clock to 2ghz and seems to support higher overclocks stably where other kernals can't. Except battery life has decreased with recent kernals
-Umarokernal this is the kernal iv come back to twice and am still on. It allows overclock to 1.9ghz and is kept updated by umaro. Performance per frequency seems as good if not better than most and osimoods miui runs smooth with this kernal on 800ghz with scarey governer (which saves battery) Another plus for me with this kernal is the scarey governer which for me definatly provides the best performance per battery ratio.

I'm currently running MIUI 1.8.5 with Eugene-Streamline 5 Kernel with the latest radio update Vision_Radio_12.57.60.25_26.10.04.12.
SetCPU with Governor ondemand provides me with better usage, power and responsive time then Smartass or Interactive.
OC to 1.2ghz
Battery life, about 30hrs with the regular 1350mah.

Screen cap

fluxgfx said:
I'm currently running MIUI 1.8.5 with Eugene-Streamline 5 Kernel with the latest radio update Vision_Radio_12.57.60.25_26.10.04.12.
SetCPU with Governor ondemand provides me with better usage, power and responsive time then Smartass or Interactive.
OC to 1.2ghz
Battery life, about 30hrs with the regular 1350mah.
Click to expand...
Click to collapse
i just got 40 hours with similar setup but i use virtuous o/c daemon instead of setcpu
big fan of streamline5 and hope that it will get updated eventually

How do you get the virtuos o/c daemon?

maxietheboss said:
How do you get the virtuos o/c daemon?
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Click to collapse
Its basically like an automatic setcpu (which can't be changed on the fly) built into the rom, its in virtuous unity roms

What sleep profiles are you guys usein. I seem to have rebooting issues with any kernel I try unless I go to a sense rom. I've tried the vipermod now to see how it goes
Sent from my T-Mobile G2 using XDA App

But how do you get the virtuos O/C daemon to work on MIUI?

You can download it threw rom manager. Even with that kernel I get reboot issues. I assume its cause system ram isn't being cleard fast enough. I'm gonna try 100mv increase to see if there's a difference.
Sent from my T-Mobile G2 using XDA App

Can I overclock with stock ROM?

I'm quite happy with the stock ROM. Is it possible to overclock it? Do I just need to install a overclockable kernel? Will I lose any functionality due to bugs/etc? What's the most reliable kernel for O/C?
Thanks,
Nick

It is possible to OC it only via a custom kernel.............so i recommend that you try the Dust kernel by einstein.frat

Yea he's right. what you need is only being rooted and recovery for flashing kernel..and of course a program which controls your cpu such as setcpu..
i recommend you kernel that cm7 used with last update. it supports 864mhz even and with no stuck( and battery drain )if you search for it on xda i am sure you will find..

valerosso said:
Yea he's right. what you need is only being rooted and recovery for flashing kernel..and of course a program which controls your cpu such as setcpu..
i recommend you kernel that cm7 used with last update. it supports 864mhz even and with no stuck( and battery drain )if you search for it on xda i am sure you will find..
Click to expand...
Click to collapse
In any way......DO NOT use the CM7 kernel...........an AOSP kernel is a bit different from the Stock(sense) one.................................it won't work

Thanks all. It looks like I'll give the dust kernel a try.
Are there preset CPU MHz settings for overclocking or is any integer value allowable? Most of the overclocking threads talk about 768Mhz, 806Mhz. My guess it's probably constrained by some clock multiplier factor.

oww i am happy to learn that

Plzzz reply which wills sbe the best overclock kernel for stock miui 12

Grand rebooting frequently

My Grand is rebooting frequently after installing carbon rom and nebula kernel
When I run any game, It starts to reboot. This happens even , when the screen is off.
That's why I reverted back to cm11

Ateekujjawal said:
My Grand is rebooting frequently after installing carbon rom and nebula kernel
When I run any game, It starts to reboot. This happens even , when the screen is off.
That's why I reverted back to cm11
Click to expand...
Click to collapse
It's not because of ROM man.... It's kernel who giving random reboots.. U really should read at least few pages of it before flashing brother ... It's under development... Hope we get a stable kernel (nebula kernel ) soon.....
Till then.. Just use pre included one in ROM
Hope i helped
Sent from my GT-I9082 using Tapatalk

Nebula kernel is really unstable, I suggest you not flash it if you're planning to use it as a daily driver. Carbon/CM11 default kernel is already snappy, but if you want more governor/IO scheduler/overclocking more than 1.3 GHz then try k2wl's evolution kernel.
It still doesn't have KSM (kernel samepage merging) which is supposed to lower the RAM usage, but I think all AOSP-based ROMs are already very low on RAM usage.

naufalhadyan said:
Nebula kernel is really unstable, I suggest you not flash it if you're planning to use it as a daily driver. Carbon/CM11 default kernel is already snappy, but if you want more governor/IO scheduler/overclocking more than 1.3 GHz then try k2wl's evolution kernel.
It still doesn't have KSM (kernel samepage merging) which is supposed to lower the RAM usage, but I think all AOSP-based ROMs are already very low on RAM usage.
Click to expand...
Click to collapse
Thnxx bro, I'll use the evolution kernel, but k2wl hasn't released the latest version yet

Ateekujjawal said:
Thnxx bro, I'll use the evolution kernel, but k2wl hasn't released the latest version yet
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Click to collapse
Well holidays are already over, so I guess he's now busy with work/school/college. Devs are just regular guys...
The KSM feature isn't that much of a different anyway... What I'm hoping to see in next version is more frequency steps... as of now it is 312-600-800-1200-more but it should be better if like this: 100-200-312-400-500-600-700-800-900-1000-1100-1200... Hahaha maybe I'm asking a bit too much.

naufalhadyan said:
Well holidays are already over, so I guess he's now busy with work/school/college. Devs are just regular guys...
The KSM feature isn't that much of a different anyway... What I'm hoping to see in next version is more frequency steps... as of now it is 312-600-800-1200-more but it should be better if like this: 100-200-312-400-500-600-700-800-900-1000-1100-1200... Hahaha maybe I'm asking a bit too much.
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Click to collapse
Why would anyone want to drop as low as 100 Mhz if 312 is good and battery saving??

Ateekujjawal said:
Why would anyone want to drop as low as 100 Mhz if 312 is good and battery saving??
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Click to collapse
Yes I think it will... because there are some apps that sync in the background (such as Google apps) even when the device is asleep. With the current frequency steps it is either Deep Sleep (no CPU activity at all) or 312 MHz... and I think 312 MHz is still too high for only background app syncing while asleep... just my 2 cents. :silly:
But I imagine people who use conservative governor will have a hard time using 100 MHz as the minimum frequency... because the governor scales the freq so slow, the phone will lag a lot longer when waking up :silly:

[Noob Guide] What is and How to Undervolt

Hello, i wanna share my experience undervolting.
For people who dont know what undervolting is, its the power or energy that the battery send to the CPU with determinate clock speed.
For example:
384 Mhz is the lowest frequency of our CPU, it has a 800mv volt in the stock ROM with stock kernel.
So in theory, the battery send 800mv to the CPU when it runs at 384 Mhz.
The effect of undervolt the CPU is bassically get more battery life and at the same time reduce the temperature of the phone.Less energy send less battery used and less hot phone in our hands.
How to Undervolt
Im running Stock ROM with Ruby Kernel stable.
For undervolt you need a kernel that support it, you can do it in all rom if the kernel support that.
If you want to Undervolt, i recommend you to use Trickster MOD.
You can Undervolt maybe -50mv all frequencies and see how it goes. Some people can even in best cases undervolt -200 mv. But you need patience to test slowly.
DONT TICK SET AT BOOT IF NOT TESTED.
That why you cant:
For example if you undervolt -100mv and if not stable, and you have set at boot ticked, it will freeze the screen and after reboot it will happen again.
After you set the mv for undervolt, download from play store CPU stability test and run it.
It will test all CPU frequencies to see if it is stable.
If you dont get any SoD, congratulations its stable.
My undervolt settings are -100 or in some cases -75 mv and very stable. My battery temp is 30 C°.

Thank you very much
Sent from my LG-E975 using XDA Premium 4 mobile app

What is needed to undervolt?

Thanks for the info. What are your battery stats after undervolting? How does it suffer other operations of our mobile like browsing or gaming etc ?
Sent from my LG-E975 using xda app-developers app

You need to first make a backup, install a custom kernel, install trickster mod, and from there apply what this discussion is talking about. Good luck!
Sent from my Nexus 5 using xda app-developers app

lfuentes said:
What is needed to undervolt?
Click to expand...
Click to collapse
Bootloader unlocked with freegee and some kernel for your rom that supports undervolt.

nch26 said:
Bootloader unlocked with freegee and some kernel for your rom that supports undervolt.
Click to expand...
Click to collapse
And after that? Some specific app?

lfuentes said:
Some specific app?
Click to expand...
Click to collapse
Depends on the kernel. I am using Trickster Mod with Viper ZVC kernel. There are other control apps available -- some of them are kernel-specific, some are more universal (Kernel Tuner, Android Tuner, System Tuner, etc.). Look in your kernel's thread -- the developer usually tells which control app(s) to use with it.

nch26 said:
Hello, i wanna share my experience undervolting.
For people who dont know what undervolting is, its the power or energy that the battery send to the CPU with determinate clock speed.
For example:
384 Mhz is the lowest frequency of our CPU, it has a 800mv volt in the stock ROM with stock kernel.
So in theory, the battery send 800mv to the CPU when it runs at 384 Mhz.
The effect of undervolt the CPU is bassically get more battery life and at the same time reduce the temperature of the phone.Less energy send less battery used and less hot phone in our hands.
How to Undervolt
Im running Stock ROM with Ruby Kernel stable.
For undervolt you need a kernel that support it, you can do it in all rom if the kernel support that.
If you want to Undervolt, i recommend you to use Trickster MOD.
You can Undervolt maybe -50mv all frequencies and see how it goes. Some people can even in best cases undervolt -200 mv. But you need patience to test slowly.
DONT TICK SET AT BOOT IF NOT TESTED.
That why you cant:
For example if you undervolt -100mv and if not stable, and you have set at boot ticked, it will freeze the screen and after reboot it will happen again.
After you set the mv for undervolt, download from play store CPU stability test and run it.
It will test all CPU frequencies to see if it is stable.
If you dont get any SoD, congratulations its stable.
My undervolt settings are -100 or in some cases -75 mv and very stable. My battery temp is 30 C°.
Click to expand...
Click to collapse
Thank you, I'm using AK kernel with UKM and Synapse app from google playstore. Using E-975 (intl.). Can you suggest if I should change the global setting or the individual settings for frequencies ? I had recently (soft) bricked my phone by running benchmark at ~1900mhz CPU and 487mhz GPU (like a villain, I know. Re-connected battery to save it... phew..). I'm really cautious now and I just want it to be less hot and save some battery, that's all. Any guidance would be really appreciated... thanks

Claureid said:
Thank you, I'm using AK kernel with UKM and Synapse app from google playstore. Using E-975 (intl.). Can you suggest if I should change the global setting or the individual settings for frequencies ? I had recently (soft) bricked my phone by running benchmark at ~1900mhz CPU and 487mhz GPU (like a villain, I know. Re-connected battery to save it... phew..). I'm really cautious now and I just want it to be less hot and save some battery, that's all. Any guidance would be really appreciated... thanks
Click to expand...
Click to collapse
I dont have anymore this phone because some people stole my phone like 1 year ago. Sorry.

Oh okay, sad loss....