Can anyone tell me the benefits of using a kernel like Trinity or netarchy or matr1x?
I've been searching and basically I want the stability of the stock kernel, but with better battery life. I was eyeing the trinity undervolted kernel but wasn't sure if it would affect anything in terms of FC or performance?
Oh, I'm using MIUI and was reading around and some people have experienced different negative things when using this ROM?
Well other kernels have a lot of features, like oc'ing, uv'ing, bln, voodoo, etc haha
Ohh okay. The only thing I see of benefit for me right now is the undervolting to increase battery life. I mean I haven't met an app that I can't run yet so no point in over clocking.
Unless I'm missing something
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I'm kinda new to all this, but what is the difference between changing a kernel versus changing a ROM? or is that the same thing?
for example, i understand backlight notification works on some kernels on the nexus s...does this require changing the ROM? any help would be appreciated
A ROM is basically the custom image (think of it as an os) for your android phone. ROMS are usually based off of stock android or cm7. ROMS allow for differen gui's, etc.
The kernel is basically the piece of software that allows the rom (os) to communicate with the hardware of the phone. You always see things in kernels called "voltages" or cpu speeds...that is set in the kernel, and allows the phone to run at a different cpu speed. Also, you see bln. That communicates with the hardware and allows the back lights to light up when you receive a notification.
That was a simple explanation, but it gets the point across
thank you for that...makes perfect sense... so if I want to just get BLN working, is there a kernel that would work with my stock ROM? or do I have to use the kernel with a specific ROM? I'm still unsure of the steps required to make this happen
Bln is baked into a kernel. Just flash a kernel and u will get bln
Sent from my HTC Sensation 4G using XDA App
Related
I have tried the other Kernels available , Genocide, Twilight etc. The performance gains are real and it is amazing what the developers are doing.
However I have significant instability with these Kernels compared to Stock. I use my phone for business and stability is #1 priority for me. The only fix I really need is the skipped key press bug. I am running stock now but the keyboard is unusable without the fix.
Would one of the developers that knows what they are doing have time to compile a stock kernel with only the skipped keyboard fix implemented?
Thanks!
violinbf said:
I have tried the other Kernels available , Genocide, Twilight etc. The performance gains are real and it is amazing what the developers are doing.
However I have significant instability with these Kernels compared to Stock. I use my phone for business and stability is #1 priority for me. The only fix I really need is the skipped key press bug. I am running stock now but the keyboard is unusable without the fix.
Would one of the developers that knows what they are doing have time to compile a stock kernel with only the skipped keyboard fix implemented?
Thanks!
Click to expand...
Click to collapse
The closest thing I've found is this:
http://forum.xda-developers.com/showthread.php?t=1039991
I'm like you, I want stability above all else and I only wanted the skipped keyboard fix. I don't care about overclock/undervolting and what not. Just want something stable. Although this kernel has some other minor changes, it's pretty much stock.
I just flashed this kernel this morning and haven't had any issues thus far but it's only been a few hours.
I'll report back tomorrow and let you know if I run into any issues.
Wrong section dude this need to be in general.
Sent from my SPH-D700 using XDA Premium App
Clean Kernel EC05 should suit you well, and finally has a proper post here:
http://forum.xda-developers.com/showthread.php?t=1053252
It has no volting done, and has the same performance as the stock kernel.
Hope you like it!
DRockstar said:
Clean Kernel EC05 should suit you well, and finally has a proper post here:
http://forum.xda-developers.com/showthread.php?t=1053252
It has no volting done, and has the same performance as the stock kernel.
Hope you like it!
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Click to collapse
Just wanted to say thanks again for compiling that kernel. Downloaded voodoo controller from the market as well. Didn't realize what I was missing as far as sound quality!
Not to rudely question your decision, but have you tried any customs that support voltage control? (Currently only genocide, but twilight is promising it soon). I used to have terrible instability, but it was because my phone couldn't handle undervolting... genocide + voltage control removing undervolt fixed that.
On a side note, if you decide to try genocide make sure you go to the end and look for the 1.0.1 test build, it fixed the kswapd0 high cpu usage bug (rare, but definitely made the phone less stable). I've had 18 hours of perfect uptime (not battery of course) since installing the update, and I have large tendancy to max out my phone.
Sent from my SPH-D700 using XDA App
I'd like to have stock, ext4, and keyboard fix. Stability is my #1 priority as well...that being said, I'm running the Genocide kernel at stock speed, and it seems pretty stable. Been using now for a matter of weeks.
Sent from my SPH-D700 using XDA App
Thread in the wrong section. Please post in the proper section. Thread closed.
hey guys.. i guess im kinda new with androids but all i have is a question... now the i learned how to flash a rom.. its very cool but why do we need kernels what does it mean? just flashing a rom thats not all there are kernels and other stuff but i dont know what they are and what for
Kernels are the core system. Sort of like drivers. Custom Kernels affect stuff like Overclocking for speed, Undervolting the processor to save battery, GPS locks, WiFi range, etc.
They can increase stability, speed, and battery.
The big thing, I think, that most people sought after is the Overclocking/Undervolting (OC/UV). This overclocks the processor while lowering the power usage of the chip at the same time. So you get a faster phone while saving battery. Brilliant. It is my understanding that custom kernels come with normal settings by default. They only ALLOW overclocking abilities using programs like SetCPU and the likes. I think the voltage is lowered on all speeds though, so flashing an UV rom will save you battery even if running 1ghz stock speed. I've seen people go up to 1.4ghz.
It is best to test a rom first for a few days. Figure out what bugs you encounter, if any. Get a feel for the rom so when you flash a new kernel you can see if it will work for you. If you do too much at once and you encounter bugs it will be hard to pinpoint.
I've flashed custom kernels but don't do it often. I know CM roms have their own custom kernels that I believe are flashed back when flashing the rom. This is why CM7 differs from stock in a lot of ways. One example is stock G2x won't work with Wii remotes. The bluetooth stack in the kernel is a custom LG one and doesn't work. CM uses a more common bluetooth stack so you not only gain this functionality but also others.
The list goes on and on. I think most of the custom kernels are BASED off CM7 and are only compatible with CM7. I think a custom kernel on top of a stock LG rom will cause bootloops. So the kernel and rom have to work together.
I am not an expert but I think I've touched the bases. Someone correct me if anything is untrue or misinformative. Technicalities aside, this is the gist of it.
player911 said:
Kernels are the core system. Sort of like drivers. Custom Kernels affect stuff like Overclocking for speed, Undervolting the processor to save battery, GPS locks, WiFi range, etc.
...<snip>
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Click to collapse
excellent explanation, i've kinda been wondering about all this myself. Thanks!
player911 said:
Kernels are the core system. Sort of like drivers. Custom Kernels affect stuff like Overclocking for speed, Undervolting the processor to save battery, GPS locks, WiFi range, etc.
They can increase stability, speed, and battery.
The big thing, I think, that most people sought after is the Overclocking/Undervolting (OC/UV). This overclocks the processor while lowering the power usage of the chip at the same time. So you get a faster phone while saving battery. Brilliant. It is my understanding that custom kernels come with normal settings by default. They only ALLOW overclocking abilities using programs like SetCPU and the likes. I think the voltage is lowered on all speeds though, so flashing an UV rom will save you battery even if running 1ghz stock speed. I've seen people go up to 1.4ghz.
It is best to test a rom first for a few days. Figure out what bugs you encounter, if any. Get a feel for the rom so when you flash a new kernel you can see if it will work for you. If you do too much at once and you encounter bugs it will be hard to pinpoint.
I've flashed custom kernels but don't do it often. I know CM roms have their own custom kernels that I believe are flashed back when flashing the rom. This is why CM7 differs from stock in a lot of ways. One example is stock G2x won't work with Wii remotes. The bluetooth stack in the kernel is a custom LG one and doesn't work. CM uses a more common bluetooth stack so you not only gain this functionality but also others.
The list goes on and on. I think most of the custom kernels are BASED off CM7 and are only compatible with CM7. I think a custom kernel on top of a stock LG rom will cause bootloops. So the kernel and rom have to work together.
I am not an expert but I think I've touched the bases. Someone correct me if anything is untrue or misinformative. Technicalities aside, this is the gist of it.
Click to expand...
Click to collapse
Ya, thanks for putting the time into explaining. I was wondering the same thing..
Wow that was briliant thank you...
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Can anyone explain to me what kernels are what is their function? I noticed that the update did not change my kernel. Is that a bad thing that they did not include a new one in the update? Also I am voinv to be installing xboarxers stock. Rom first to root the phone and I want know if I should chance the kernal and what effect it will have. I am taking small steps because want to understand what I am doing. Thank for any help you guys can give me.
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The kernel is the lowest point in the system. It controls how the software communicates with the hardware: how the CPU behaves, how the buttons behave, how the screen functions, etc.
The main use of custom kernels is to Overclock and Undervolt. OC means pushing your CPU to be faster than it was ever intended to be; you get better performance but if overclocked too long, it will be damaged. Worst case scenario, you will literally melt your motherboard. But this is only a danger if you leave it overclocked 24/7 and constantly push the CPU to its limits (playing 3d games for instance)
Faux's kernel can OC to 1.5 GHz and Morfic's can OC to 1.1.
The next common use is Undervolting, which means giving your CPU less electricity than it would like. This again is extremely dangerous if not done properly, but yields noticeably better battery life. Morfic's is the best for UV IMO, though you cannot change the undervolting, he has it locked into what he has found to be the best. And this isn't necessarily a bad thing, as too much UVing will cause potentially serious stability issues with the device. It's not nearly as dangerous as improper OCing (it won't permanently ruin the hardware) but it is a danger. Faux's lets you UV to your heart's content.
Faux's is better if you want performance, because it has higher OC. Morfic's is better if you want battery life, because it has better UV and the CPU clock speeds themselves are better tuned for lower speeds than higher ones.
I absolutely love my faux kernel. its at 1.4 and amazing battery life. The screen sensitivity is awesome. Honestly its all prefrence.... I won't go away from cm7w/ faux
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http://en.wikipedia.org/wiki/Kernel_%28computing%29
I'd start here. Or just google info on the linux kernel (since that's what android runs on top of.)
Can you flash faux kernel on top of bionix 2
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When you flash a kernel, you just need to know what the base of it is to pick the proper one. There are really only 3 bases at the moment:
1. Stock 2.2 That'd be faux's .5, and I know morfic has some older 2.2 based kernels in his thread.
2. Stock 2.3 (Which faux is working on now, there are a couple floating around)
3. CM7 Faux and morfic both have kernels that work here. (2.3.4 and 2.3.5 based roms use this, miui, and of course cm7 )
Bionix is based on 2.2 (Which I haven't actually checked, but I'm sure it's in the first post.)
For most of them, just read the first post, or even the title. It'll say what it's based on, and then you can flash whatever you want. Just always do a nandroid backup before, you never know if you might for whatever reason have to flash back. If you don't, you need to reinstall your rom (or manually change the kernel and modules, of course) to get back to what the rom came with.
Happy flashing.
If i am running stock rooted GB OTA, can I flash faux's latest Kernel 006 with ext4?? Or do you have to have an ext4 rom to be able to flash ext4 kernels?
Thanks.
Thanks a lot that shed some light on. The subject
So it appears that the dev will tell you which mernels arw compatible with their rom in the thread for that particilar rom. If I want to use eglesblood which is 2.3.4 or.5 xan I use tbe stock kernel? Also what is the difference between the .3 .4 and .5 in the gingerbread make is that carrier specific or moel specific like the blackbwrry 8520 is for tmo and 8530 is for sprint?
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2.3.4 and 2.3.5 are based on cm7 code, so you'd use the cm7 based kernel. (LG hasn't given us 2.3.4 or 2.3.5).
As far as ext4, it's a different file system is all. Faux's kernels mount the data and system partitions as ext4, but don't actually convert them. Morfic's do a full convert. Ext3/4 support is in the kernel, not the rom, so as long as the kernel supports it you can do it. (Which every custom kernel I've seen supports ext4)
If you want more information, google is your friend. Here is a pretty simplistic explanation of the ext2,3,and 4.
http://www.thegeekstuff.com/2011/05/ext2-ext3-ext4/
As for the differences, 2.3.3 to 2.3.4 had some major framework changes. 2.3.4 to 2.3.5 seems to be only minor bugfixes. If you want full changelogs, I'd google them.
So if I want to use eglesblood then I have to change the kernel too? Do I have to do it separately or is it included in the rom?
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You never *need* to change kernels. Using the kernel that comes with the roms works just fine. Only time you need to change kernels is if you want to overclock, (never really saw the point in it, and quadrant benchmarks are useless.) want tun or cifs support, undervolting, ext4, etc.
If you don't need any of those things, or don't know what they are, just stick with the kernel that comes with the rom.
Okay that's cool so all I have to do is put EB on my SD card and flash away I am thinking about starting simple first with either xboarders stock or tweeked
.
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I'm really very happy with my Nexus S 4G. It's unlocked and rooted, but otherwise pure stock and I really like it that way.
Coming from the Hero it's a pleasure to have a phone that doesn't require heavy modification to make it perform properly. Still, I miss the thrill of flashing ROM's and kernels.
I would like to try a kernel...mainly to simply o/c a bit, but I don't want it to suffer stable and reliable operation. I recall with the Hero, some of the kernels would adversely affect things like the GPS, making it something I couldn't rely on.
So my question: what kernel can I use that is uncapped, but will otherwise be as close to stock as possible?
Thanks for your thoughts!
Kernels are pretty different over here. I don't even know what's closest to stock. They pretty much all have mods in them. Matr1x kernel is pretty popular. You may have to up the voltage for it if you oc to 14xx. 1200 seemed pretty stable to me with default voltages. Currently franco kernel is pretty popular. You can't oc it, but it seems pretty snappy without oc. GLaDOS is also being used a bit but i've read some mixed reviews and for me at least it did seem a little lagging at times for the short period I ran it. I tried Trinity kernel when I first moved over from the hero and it seemed kind of flaky though it's possible that could have been due to the kang I was running. There are a few others out there. Cm7 kernel has a lot of the same mods cooked in though it's likely not the latest updates. You will see a lot of mention of BLN and Voodoo. There are apps on the market for those features and there's an app nstools that has some kernel config settings you can adjust depending on kernel. Mainly just try to read a lot. Most of the roms and kernels haven't given me any major issues beyond the random reboot, which coming from the hero, just means "normal" lol.
Sent from my Nexus S 4G running CM7/franco.Kernel
Once you flash you can't stop O_O that my experience i'll direct you to Peteralfonso's kernel on his website here
Searching the forums would help you more than anything. You will get more info by searching, rather waiting people to reply here. These questions are asked on daily basis. And get the same replies everyday. I don't sound to be mean but seriously there is more info than you can get by starting another thread, only thing is you need to dig the info.
I have tried a few different roms and kernels and for once cm7 runs perfect for me w the supplied kernel. No reboots. Has been stable at 1440 performance for testing but I usually leave it at 1000 on demand.
Yeah they all have this blinking light crap in it now by default which I hate, and the lights turn off and I don't like that either. I want the light on when I'm using the phone and off when I'm not, not the other way around!
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I like the bln mod, but I do not like the one that turns off the backlights when using the phone. It's just easier to use the buttons imo and gives a quicker visual reference for everything. Otherwise I mostly am left wondering what is up with all the black space.
Sent from my Nexus S 4G running CM7/franco.Kernel
suhas_sm said:
Searching the forums would help you more than anything. You will get more info by searching, rather waiting people to reply here. These questions are asked on daily basis. And get the same replies everyday. I don't sound to be mean but seriously there is more info than you can get by starting another thread, only thing is you need to dig the info.
Click to expand...
Click to collapse
I hear you on that, and spent a lot of time reading comments and concerns and problems about the various kernels available. They all seem to pretty much be experimental, with various idiosyncratic problems and lots of bells and whistles such as aforementioned BLN, Voodoo, deep idle, etc.
I thought maybe I was missing something in my search for a kernel that would allow o/c, but not have the stability concerns of a the feature-rich, highly customizable kernels.
I think the Matr1x kernel will be your best option, u can OC it till 1400mhz, what I don't recommend to do, but at 1200/1300mhz its pretty stable.
It also got many options like BLN, BLX, Live OC, touch wake, etc.
But if you don't want them, why you just don't use 'em?
Like just flash the kernel and keep it like it is, and maybe do some overclocking.
wanna stable ? stock kernel
basically , there is no kernel more stable then stock ...
qtwrk said:
wanna stable ? stock kernel
basically , there is no kernel more stable then stock ...
Click to expand...
Click to collapse
True, but he prefers to OC it a bit.
Sent from my Nexus S
franciscofranco's kernel (link) works best for me. It's fast (no lags even without OC, I'm running at stock 1000 MHz), reliable (I've been using it for at least month and I haven't got any random reboots or application hangs) and battery efficient (thanks to deep idle and other tweaks).
irizwan said:
Once you flash you can't stop O_O that my experience i'll direct you to Peteralfonso's kernel on his website here
Click to expand...
Click to collapse
+1
Never found a more stable kernel than Pete's. However, I've been on Glados for the last week or so and am seeing excellent battery life with Deep Idle.
Icecoldmeat said:
True, but he prefers to OC it a bit.
Sent from my Nexus S
Click to expand...
Click to collapse
personally i think overclock is totally unnecessary , why ? 1 GHz is sufficient to handle all job you require to the phone...
Best thing to do would be compile your own stock kernel with oc.
qtwrk said:
personally i think overclock is totally unnecessary , why ? 1 GHz is sufficient to handle all job you require to the phone...
Click to expand...
Click to collapse
True again. I love 1100mhz because it gives you a bit more speed with no lagg, and you batterylife is still awesome.
Sent from my Nexus S
deville~> said:
franciscofranco's kernel (link) works best for me. It's fast (no lags even without OC, I'm running at stock 1000 MHz), reliable (I've been using it for at least month and I haven't got any random reboots or application hangs) and battery efficient (thanks to deep idle and other tweaks).
Click to expand...
Click to collapse
with deep idle OFF, the difference between the two is minimal, idle stats displayed deep idle has been 0
Downloaded and testing peter alfonso's kernel now. Its very minimalistic, no options like deep idle etc, and u can OC it up to 1400mhz. Running 400-1100mhz for a day now and the battery life is just awesome.
U can find it on:
http://www.peteralfonso.com
Sent from my Nexus S
albundy2010 said:
Best thing to do would be compile your own stock kernel with oc.
Click to expand...
Click to collapse
Or one with LiveOC which is kinda better cause it also OC the GPU =D
+1
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the akward moment when someone said they +1'd you but actually didn't -_-
there're too many to choose.i don't like the ones that update so often indeed.
Hey guys,
just wondering which Kernel you are using as a daily driver.
Personally, I flashed CleanSlate today because it offers a lot of useful features and combines performance with battery life.
I think the other kernels will do this also, but yes...
Thx for opinions!
I'm hopping back and forth between Franken and Flash
Using CleanSlate right now
[kernel]ElementalX.
vibration control, stock stability, and it works.
Stock, none of them have anything that stands out majorly to me and it sounds like most of them will screw up updates and quite likely have compatibility issues and require me to start over from scratch on my phone if the tiniest thing goes wrong.
Wondering also what kernels people are liking for battery
I am using ElementalX kernel 1.04 for battery life, but it is not really awesome. I think when a better kernel comes il will change that
This really needs to be stickied.
I was using Franken kernel for the longest achieving a 6+ hrs of SOT after every full charge.
I like flash n go, so i don't like a lot of features just a simplified kernel that's good on battery without the need for me to use kernel manager.
But then i flashed Franco's kernel.
So right now my 3 in rotation are Flash kernel, Franco and franken.
edit: it's between flash kernel and franken tbh for me, no shade on franco, it's a stable backup for me
BUMP
Using Franco right now, battery life is a big priority.
Stock, don't see any reason to change it, works perfectly
Franco kernel for battery life, but if SimpleGX kernel come in the future i will change for sure...