Database Users

Kernel question.

Sorry to bang on and on but I'm new to all this, I'd like to know which kernel to use with CM7 and where to get it, I looked at IR kernel but they seemed a little out of date, what is everyone using with the nightlys? I have searched the forum but found nothing of use. I want better battery life and audio boost if possible.
I want to know what radios are but I'll try a search first.
TIA
SR
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Sort by date
IR's newest kernels are only a couple days old. When you are in Mediafire, make sure you sort by date to get the newest kernels to the top of the list. By default, Mediafire sorts by name so the oldest kernels show up first.
Hope this helps!

Thank you so much my friend! Was hard to spot from mobile browser! IR kernel successfully installed. Now what is the difference between them?
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sparkyryan said:
Thank you so much my friend! Was hard to spot from mobile browser! IR kernel successfully installed. Now what is the difference between them?
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Click to expand...
Click to collapse
You don't know the difference??? And you still flash it... well, I suggest reading a bit more before you flash something... but the main difference between the CM kernel and IR's kernel is the inclusion CodeAurora's AVS (Adaptive Voltage Scaling) code

I was referring to : no boost, wififast etc
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sparkyryan said:
I was referring to : no boost, wififast etc
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Click to collapse
Explanation from WildMonk regarding kernels (i've been using his Kernel for half a year and i think the performance & battery life are much more better from CM7 stock kernel):
-What's the difference between CFS and BFS?
See this short post for the difference between Completely Fair Scheduler and Brain F*** Scheduler. In summery, CFS is better for multitasking, BFS is better for user interactions (keyboard, homescreen swiping, etc).
-What's the difference between SVS and AVS?
Static Voltage Scaling will change the voltage based on a set table created by the kernel maker. Example: At a certain speed, say 245MHz, 925mV is feed into the CPU. At 998MHz, 1225mV is used.
Adaptive Voltage Scaling will change the voltage depending on temperature and CPU needs. Personally, AVS is running rock solid for me but I can't say for sure if it will be for everyone so SVS kernels will continue to be made available.
-What is this "No Audio Boost Version"?
Many of the custom kernels posted in this forum and the kernels used by default in the CM6 roms have this feature where it increases the loudness of the speakers during calls. Its been reported that some bluetooth headsets are overly sensitive to the increased loudness and some have reported that it distorts the audio quality even though volume has been lowered by the user. Due to an overwhelming request to make a kernel without this feature, I have included a separate set with each release that does not boost the volume.

Thanx fella excellent explanations!!
zupernovae said:
Explanation from WildMonk regarding kernels (i've been using his Kernel for half a year and i think the performance & battery life are much more better from CM7 stock kernel):
-What's the difference between CFS and BFS?
See this short post for the difference between Completely Fair Scheduler and Brain F*** Scheduler. In summery, CFS is better for multitasking, BFS is better for user interactions (keyboard, homescreen swiping, etc).
-What's the difference between SVS and AVS?
Static Voltage Scaling will change the voltage based on a set table created by the kernel maker. Example: At a certain speed, say 245MHz, 925mV is feed into the CPU. At 998MHz, 1225mV is used.
Adaptive Voltage Scaling will change the voltage depending on temperature and CPU needs. Personally, AVS is running rock solid for me but I can't say for sure if it will be for everyone so SVS kernels will continue to be made available.
-What is this "No Audio Boost Version"?
Many of the custom kernels posted in this forum and the kernels used by default in the CM6 roms have this feature where it increases the loudness of the speakers during calls. Its been reported that some bluetooth headsets are overly sensitive to the increased loudness and some have reported that it distorts the audio quality even though volume has been lowered by the user. Due to an overwhelming request to make a kernel without this feature, I have included a separate set with each release that does not boost the volume.
Click to expand...
Click to collapse
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[Q] Cyanogenmod 10 with Trinity 7 CPU overclocking

So I'm kind of new to messing around with tablets but learning a few things. On my Nexus 7 I decided to put Cyanogenmod 10 on it so I could customize a few things. I then decided I wanted to overclock the max CPU frequency past 1300 MHz so I installed Trinity 7 kernel. Now I'm able to run it at 1700 MHz which runs a few apps much faster but after exiting out of the apps and going back to check on the max CPU frequency and it's set back down to 1300 MHz.
Does anyone have an idea what could be causing this? So far there's only one app I'm overclocking for so it's not a big issue but it would still be nice to figure out the issue.
Thanks

I down loaded too. I just changed the governer to performance and it stays on 1600 etc on set cpu

EsX GingaNinja said:
So I'm kind of new to messing around with tablets but learning a few things. On my Nexus 7 I decided to put Cyanogenmod 10 on it so I could customize a few things. I then decided I wanted to overclock the max CPU frequency past 1300 MHz so I installed Trinity 7 kernel. Now I'm able to run it at 1700 MHz which runs a few apps much faster but after exiting out of the apps and going back to check on the max CPU frequency and it's set back down to 1300 MHz.
Does anyone have an idea what could be causing this? So far there's only one app I'm overclocking for so it's not a big issue but it would still be nice to figure out the issue.
Thanks
Click to expand...
Click to collapse
There might be an option for "set at boot." Try that.
mccolvinj said:
I down loaded too. I just changed the governer to performance and it stays on 1600 etc on set cpu
Click to expand...
Click to collapse
That's not the solution. The performance governor keeps the cpu speed at max frequency at all times (even when screen is off). That will eat up your battery quick.

v9s said:
There might be an option for "set at boot." Try that.
Click to expand...
Click to collapse
Thanks that seemed to have fixed it though I figured out you have to turn that on THEN pick the max CPU frequency. Doing it the other way around won't change anything, I think that's what I tried before.
Also mccolvinj I'd personally leave it on interactive so it will just use the max CPU when needed or at least that's what I got out of the descriptions of governors I looked up.
EDIT: Nevermind...that only temporarily fixed it, it went back to 1300 after a bit. Maybe I installed Trinity 7 wrong?

Does trinity have superuser permissions?
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winged mantis said:
Does trinity have superuser permissions?
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Click to collapse
I think so since it's rooted, is there a way I can check or give it permissions?

you need the powerHAL "fix". your rom should include it, but i guess it doesnt. search the n7 forums for a flashable. or, the trinity kernel toolbox app includes the "fix" just in case your rom doesnt.

EsX GingaNinja said:
I think so since it's rooted, is there a way I can check or give it permissions?
Click to expand...
Click to collapse
Check in the superuser app
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kernels arent rooted, your roms are. you can flash a custom kernel on a rom without root. the only difference is that you wouldnt be able to control the cpu with ant cpu control apps, the apps need root.
ive posted the solution already. either find the flashable powerHAL fix or use the trinity kernel toolbox to control the kernel. tkt includes the powerHAL fix.

[Q] disable Dvfs?

Tl;Dr is it possible to turn off Samsung's built in frequency adjusting/locking?
I was messing around with clock speeds just to see what affect it might have (it used to be helpful on my Note 2 to raise the min clock speed a step or 2 when I turned my screen on) and noticed some strange behavior.
It seems Samsung has built in some of this. Every time I turn on my screen most cpu apps will tell me the min clock is set to something like 1.9 ghz. The built in stuff overrides any settings I apply. Now, the main reason I'd like to change this is the Samsung stuff seems buggy (surprised? Psh...) and the min cpu frequency seems stuck at 1.9 ghz. If true, that can't be good for battery.
So, anyway to turn that stuff off? I imagine it would require a custom kernel and I should just give up.
Thanks
Apps tried:
ROM toolbox pro
No frills cpu control
Antutu cpu master
Other free apps
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I think Wanam has an option for this or look in xposed for "Samsung DVFS Disabler"
Sent from my Galaxy Note S5

Sorry for the extremely late reply, but neither of those seem to work. Oh well, I'll just live with it. Thanks.
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[SHARE] Good Kernel Tweaks for S4 Mini

Hey guys,
For me, I UC the GPU to the lowest freq possible (192mhz) and CPU to max 1Ghz (and min 192mhz). My CPU governor is on Smartmax and I/O is in FIOPS. I also enabled Multicore saving to increase battery life. And well, what can I say 4hrs of continuous use and im on 54℅. 4hrs includes playing a DS emulator for 15 mins, asphalt 8 for 30 mins and another 30mins for YouTube watching
**Some things to note is that I always switch my phone to airplane mode (since i got not SIM for now). I also turned off Wifi and Sync (in power control widget) before I set off to play any game. I also have a habit of learing the recents list too. Furthermore, Asphalt 8 is in Very Low graphics (since idl fancy graphics) and it runs little to no lag
So don't be stingy Do share with the community regarding tweaks you guys made to your devices kernel and share you experience
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Why you created a new thread there is already mine about that

Aronuser said:
Why you created a new thread there is already mine about that
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Click to collapse
Theres many other kernels and not just F4ktion so thts why i start a new thread specifically for all kernels (ie: vikinger etc)
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Aronuser said:
Why you created a new thread there is already mine about that
Click to expand...
Click to collapse
TiTAN-O-One said:
Theres many other kernels and not just F4ktion so thts why i start a new thread specifically for all kernels (ie: vikinger etc)
Click to expand...
Click to collapse
He's right. There is many (9) kernels for S4 mini.
Here all we heve for now: S4 mini kernels
Cheers

how to increase battery life by 25%

It is simple, tested on my nexus 6, just go to system/bin and delete mpdecision, then install an app that controls kernel, like kernel adiutor, raise min freq of cpu to 883000 mhz, then set apply on boot, reboot phone and enjoy lagfree and smooth super battery life

you are my hero

fedef12evo said:
It is simple, tested on my nexus 6, just go to system/bin and delete mpdecision, then install an app that controls kernel, like kernel adiutor, raise min freq of cpu to 883000 mhz, then set apply on boot, reboot phone and enjoy lagfree and smooth super battery life
Click to expand...
Click to collapse
Isn't enough to just turn off mpdecision in the kernel app?

this only works for stock roms? I can't find any mpdecision file on /system/bin
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blanco2701 said:
Isn't enough to just turn off mpdecision in the kernel app?
Click to expand...
Click to collapse
if it turn off the 3 sec boost of mpdecision yes
sgloki77 said:
this only works for stock roms? I can't find any mpdecision file on /system/bin
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Click to expand...
Click to collapse
works on all roms for nexus 6, some file managers cant see mpdecision in system/bin, try it in recovery using twrp

fedef12evo said:
raise min freq of cpu to 883000 mhz
Click to expand...
Click to collapse
Can you tell me if it's the minimum CPU frequency in the CPU tab or in the CPU governor configuration?

blanco2701 said:
Isn't enough to just turn off mpdecision in the kernel app?
Click to expand...
Click to collapse
Disabling in a kernel app will accomplish the same thing. The reason you are seeing a change in battery life is because of the 3 second input boost of MPD. Most of the custom kernels have a generic touch boost driver that is set to 1 second or less to take the place of the mpd boost and increase battery because of the decreased boost time.
MPD works great for some people and not for others. It is greatly dependent on your usage habits. For my typical usage, with mpd on, I average 6-7 hours of screen on time. If you are a gamer, where you are constantly touching the screen, mpd will adversely affect your battery life because of the constant boost.
As a kernel developer, I definitely would not recommend deleting the mpd binary. I would suggest trying a couple of different kernels and/or configurations to accomplish the same results.

lol.. seriously? i guess thats one reason that ive disabled mpdecision for the last 3+ years on whichever nexus i was on, but not the main reason

How can I turn mpd off on ex kernel manager

you don't need a kernel app to disable it BTW. all kernel apps do is provide a ui for you to use. it can be done via a terminal emulator app.. type,
su(press enter)
stop mpdecision(press enter)
and that's it.

I'm using kernel auditor and in the CPU hotplug section the first listing is mp decision. Is that what needs to be disabled?

OK, silly question.. do you know what mpdecision does? do you know what disabling mpdecision does?

simms22 said:
OK, silly question.. do you know what mpdecision does? do you know what disabling mpdecision does?
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Click to collapse
@simms22 good point here. This is good for everyone to know. If you disable mpd without a replacement, you risk all cores not coming back online after deep sleep. Mpd doesn't actually control hotplugging, it controls input boost and onlining of cores.
Sent from my Nexus 6 using Tapatalk

and that's exactly why I disable mpdecision, so I can have all 4 cores active at all times.

buckmarble said:
@simms22 good point here. This is good for everyone to know. If you disable mpd without a replacement, you risk all cores not coming back online after deep sleep. Mpd doesn't actually control hotplugging, it controls input boost and onlining of cores.
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Click to collapse
When you say without a replacement what are you referring to? Trying to learn here..

MrMiami81 said:
When you say without a replacement what are you referring to? Trying to learn here..
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Click to collapse
A replacement such as Zen, Mako, Blu_Plug, etc.
Also, (just an FIY) Zen isn't really a hotplug (it keeps all four cores active at all times, unlike Mako, Blu_Plug, etc). It's still lumped in there for some reason.
I highly recommend disabling MPDecision. You know what MPDecision stands for, right? MakePoor Decisions

Face_Plant said:
A replacement such as Zen, Mako, Blu_Plug, etc.
Also, (just an FIY) Zen isn't really a hotplug (it keeps all four cores active at all times, unlike Mako, Blu_Plug, etc). It's still lumped in there for some reason.
I highly recommend disabling MPDecision. You know what MPDecision stands for, right? MakePoor Decisions
Click to expand...
Click to collapse
I'm running elemental x now and I can't find mp decision on kernel auditor. Do you know if it is included with this kernel? If so how would I disable it?

MrMiami81 said:
I'm running elemental x now and I can't find mp decision on kernel auditor. Do you know if it is included with this kernel? If so how would I disable it?
Click to expand...
Click to collapse
i believe its already disabled in elementalx kernel. anyways, you can always use a terminal emulator app, then type..
su(press enter)
stop mpdecision(press enter)
thats all. all kernel apps do is give you a ui to whats already available.

MrMiami81 said:
I'm running elemental x now and I can't find mp decision on kernel auditor. Do you know if it is included with this kernel? If so how would I disable it?
Click to expand...
Click to collapse
Some kernels come with it already removed. Check the features section of the original post in the Elemental X thread or try searching the thread.
I can say from experience that Kernel Auditor doesn't give you access to all of the adjustments in Elemental X. Some features are only accessible through the official Elemental X app, so it might be there, but you can't use Kernel Auditor to adjust it.

Face_Plant said:
Some kernels come with it already removed. Check the features section of the original post in the Elemental X thread or try searching the thread.
I can say from experience that Kernel Auditor doesn't give you access to all of the adjustments in Elemental X. Some features are only accessible through the official Elemental X app, so it might be there, but you can't use Kernel Auditor to adjust it.
Click to expand...
Click to collapse
I just downloaded the elemental x app. I'm gonna go over to the thread now. I appreciate your help