[Q] CFS/BFS Clarification.. - EVO 4G Q&A, Help & Troubleshooting

I have scoured the intarwebs and I have briefed myself on these beautiful kernels.
Now this may be a noob question, and I apologize ahead of time for it..
BFS Kernel #5 & CFS Kernel #7
Are the two aforementioned kernels an Either/or type deal ? or can they be flashed together ( one after the other)..
This shows how much i know about kernels..... Can there only be ONE kernel in a ROM ?
Please help..
Thank you,
John

Only one kernel at a time, and you can flash one or the other. The BFS stands for "Brain **** Scheduler" and these kernels also include HAVS (hybrid adaptive voltage scaling) to increase battery life by regulating the voltage sent to the processor when commands are sent to it (or something like that). These kernels are newer than the non-BFS ones. I started running a BFS kernel on Saturday and am very happy with it. I just flashed #5 over #4 today and it is also working well. I was reluctant to try a BFS kernel because I was quite happy with the way my phone was running previously, but my curiosity got the better of me. I do notice a slight improvement in battery life with the newer kernel.
Hope this helps.

Related

[Q] Sprint Lover's Rom..Best Kernal for it?

Hey all,
I just flashed Sprint Lover's ROM and I was wondering what is the best Kernal for this Sense ROM? I really like the stock look, but I would love to improve some performance under the hood.
Any help would be great!
Thank you very much!!!
Gianni
mgianni19 said:
Hey all,
I just flashed Sprint Lover's ROM and I was wondering what is the best Kernal for this Sense ROM? I really like the stock look, but I would love to improve some performance under the hood.
Any help would be great!
Thank you very much!!!
Gianni
Click to expand...
Click to collapse
I always use Netarchy's kernel, but what may be good on one phone may also be bad on another phone. I suggest flashing different kernels and testing them out.
EVO on Tapatalk
piscesjoey said:
I always use Netarchy's kernel, but what may be good on one phone may also be bad on another phone. I suggest flashing different kernels and testing them out.
EVO on Tapatalk
Click to expand...
Click to collapse
Do you have a link for that Kernal? Would love to test it out.
mgianni19 said:
Do you have a link for that Kernal? Would love to test it out.
Click to expand...
Click to collapse
Go Here for his kernels. I use Netarchy Toastmod - 4.3-cfs-havs-more-sbc and so far it's worked amazing on the various ROMs I've used (including Sprint Lovers) but it's worked best for me on Myn's ROMs.
PryorDaniel said:
Go Here for his kernels. I use Netarchy Toastmod - 4.3-cfs-havs-more-sbc and so far it's worked amazing on the various ROMs I've used (including Sprint Lovers) but it's worked best for me on Myn's ROMs.
Click to expand...
Click to collapse
I think I'm gonna flash this kernel tomorrow, but maybe the nosbc so I don't fry my battery... Have you had any issues with the battery with the sbc? And do you use SetCpu with the kernel?
nck4857 said:
I think I'm gonna flash this kernel tomorrow, but maybe the nosbc so I don't fry my battery... Have you had any issues with the battery with the sbc? And do you use SetCpu with the kernel?
Click to expand...
Click to collapse
No, and no
Don't use SetCPU with a havs kernel. If you go with one of his nohavs kernels then by all means use SetCPU as you wish. Another thing, just from my personal experience (though it may be different for your phone) the CFS kernels work far better than the BFS kernels. There's a guide around here that explains the difference.
As far as SBC goes, I haven't had any issues yet. I've been using a battery monitor to watch what's going on with my battery and haven't seen anything wrong with it. Another thing I do, just as a small precaution, is not let the phone charge 6-8 hours over-night. I'll let it charge to 100% then let it sit for about 2-3 more hours and call it quits. Don't know if that really does anything, but it makes me feel better so eh.
I know the military (I'm in the Army) uses Lit-ion batteries and trickle charges them without having any of them blow up/fry, however they do lose their ability to hold a charge over time. The fact that they do it, and the only problem has been lifespan of the battery is what convinced me to try an SBC kernel. Just choose whichever you feel comfortable with. It's all preference really.
PryorDaniel said:
Go Here for his kernels. I use Netarchy Toastmod - 4.3-cfs-havs-more-sbc and so far it's worked amazing on the various ROMs I've used (including Sprint Lovers) but it's worked best for me on Myn's ROMs.
Click to expand...
Click to collapse
Netarchy Toastmod - 4.3-cfs-havs-more-sbc is the best from my personal experieince...good battery life and makes choppy roms run a lot more smoothly
nck4857 said:
I think I'm gonna flash this kernel tomorrow, but maybe the nosbc so I don't fry my battery... Have you had any issues with the battery with the sbc? And do you use SetCpu with the kernel?
Click to expand...
Click to collapse
I've been using that one with no-sbc and it's worked great with the conservative profile. HAVS just deals with what voltage the processor uses at any given time/frequency so you can indeed use setcpu with it. It's the kernels with the built in smartass governor or ROMs using other battery tweaking scripts that don't always work well with setcpu.
And trust me, the military does not trickle charge their li-ions and they only run them at 4.10 volts to extend their life (depending on battery, always less than volts than their commercial counterparts). This I know for certain.
Anyone have a link to the stock kernel
Sent from my PC36100 using XDA App
Guys quick question, with the above mentioned kernel. What frequency does if use when you turn off the screen? I want if to use the lowest possible, does the kernel do it automatically or should I use something like the overlook widget?
Also, can someone please provide instructions how to update the kernel, I haven't looked at the link yet so If there's instructions there that fine.
Thanks
wifi errors
i just flashed to netarchy kernel to my evo. cfs, havs no sbc. when i try to connect to wifi it says error. i used kernal manager to flash the kernal. is there anything i can to do to get the wifi back or do i need to go back to the stock kernel. i am running sprint lovers ROM. any suggestions.
update. when i flashed manually everything worked fine. maybe the kernel manager program has an issue with wiping the cache. not really sure. just thought i should let everyone know.
I would use the stock #15 HTC Kernel but with SBC. Link is in sec post here..
http://forum.xda-developers.com/showthread.php?t=876590
I've been using netarchy 4.3.4 cfs more havs aggressive sbc with no problems. Amazing battery life and very responsive.
Netarchy's kernels are very stable,if you're up for it try a sbc kernel,great battery life.
sbc
i was just reluctant to try an sbc because of the horror stories i have heard about frying the battery. i guess when i feel lucky i will try it.

[Q] suggestions on kernel for speed and performance?

hey guys. i'm trying to find the kernel review thread with no luck.
I switched roms (i'm on MetroPCS so using the latest MetroDroid rom) and Im finding the kernel slow. I use setcpu profiles and I notice a slight delay in response that wasn't there before.
I also benchmarked using Quadrant and setcpu set to performance at 1190/1190 and got 1083! much lower than any score i've had in the past.
what's the newest and greatest sense kernel for improved speed and performance? I have the seidio battery and always near a charger, so i'm looking for snappy performance over squeezing 15 minutes more out of the battery.
thanks!
P.S. this is a Sense-rom but 90% de-Sensed. I just prefer the look and feel of Sense after I modify my way over others.
Ziggy's (ziggy471.com) always run faster than Netarchy's for me, but you're going to have to try a few for yourself as every phone reacts differently to diff kernels.
Netarchy's Kernels & Ziggy's Kernels
nets out with his 4.3.4 and has hdmwin built in also has the kernel guide in there.
http://forum.xda-developers.com/showthread.php?t=719763

[Q] Ziggy Kernel?

On the piggy website, I'm unclear which kernel is for my incredible?
The kernels meant for the incredible have "-inc-" in their title. I believe the most recent ones end with "-041011".
holy crap there a lot of choices. Any guidance? I don't see anything listing descriptions of anything.
This would likely suit you best:
http://www.ziggy471.com/2011/04/10/beta-kernels-10-apr-11/
Ztest-INC-BFS-HAVS-041011
has brain f*ck scheduler and HAVS for custom voltage set. note this is his latest kernel release but it is also labeled beta. So if you have any weird issues with it you may want to check out an earlier release.
-- As always I have to jam in my favorite kernel (chad's incredikernel) if you haven't tried it out yet then I can only suggest that you do.
Cheers
POQbum said:
This would likely suit you best:
http://www.ziggy471.com/2011/04/10/beta-kernels-10-apr-11/
Ztest-INC-BFS-HAVS-041011
has brain f*ck scheduler and HAVS for custom voltage set. note this is his latest kernel release but it is also labeled beta. So if you have any weird issues with it you may want to check out an earlier release.
-- As always I have to jam in my favorite kernel (chad's incredikernel) if you haven't tried it out yet then I can only suggest that you do.
Cheers
Click to expand...
Click to collapse
In going back and forth, I've personally found the performance of Chad's 12/23 kernel and Ziggy's 4/10 kernel virtually indistinguishable. Some devices don't respond well to the hybrid adaptive voltage scaling (HAVS) or the settings he's implemented and will be more stable using static voltage scaling (SVS), which is the standard kernel. IncrediControl works on this Gingerbread kernels so I'm assuming it would work well on his Froyo kernels for adjusting the voltage without a script. Any decent clocking app will handle the speed. But the script guide he has is very useful and might be worth playing with if that's your thing. If you have any questions for him, he's best found at infectedrom.com these days.
Wow thanks! I enjoyed scripting on y Eris so I will look at that
Since i have everyone here, is there a stock rom that has all that blistered removed? I can adb shell and remove the stuff but I was just curious.

Best rom/kernal combination

I'm pretty sure that this question has been posted alot of times but I need help deciding on a decent rom and a kernal which would go with it that has everything working and has the best battery life as well. I will probably get CM7 but idk which kernal will go best with it.
I also need help changing the LCD density of my screen. Before I switched to my EVO I owned a HTC HD2 and had pongsters hyperdroid on it which had lower LCD density allowing everything to be smaller on the phone.
Those are my questions please help. Thank you!
Sent from my PC36100 using xda premium
Not exactly sure what you mean by LCD density but I can help with the ROM kernel question.
As far as a ROM goes the best way to find the right one is to do 2 things.
1. Make a list of things you are looking for in a ROM. Stability, 4G, HDMI, Wireless Tether, etc. Then check out ROMs that contain stable versions with those features you emphasize.
2. Get flash happy. Flash a ROM, test it for a few days to a week and then flash another one. If you find yourself coming back to one specific ROM over and over again then that is probably the one you should stick with.
Check out this thread for some ROM ideas: http://forum.xda-developers.com/showthread.php?t=951057
A few ROMs that I didn't see mentioned in there are Myn's Synergy, Salvage-Mod, Sinister, Savaged Zen, and Swag.
As far as kernels go you have to remember a basic rule. Sense ROMs get paired with sense kernels and AOSP ROMs get paired with AOSP kernels. Then you do the same thing you did with the ROMs.
1. Make a list of what you want in a kernel. HAVS, SBC, overclocking, undervolting, etc.
2. Get flash happy and test which kernel matches your ROM the best with what you are looking for.
I know that may not be the exact answer you are looking for. But ROMs and kernels are all about personal preference and daily usage trends. each one has pros and cons that different people may or may not like. Check my ROM/kernel combination. It fits my usage habits, constantly using it at home and barely use it when out of the house, but it may not fit the way you use it. Experiment and have fun.
And here is a thread about kernels: http://forum.xda-developers.com/showthread.php?t=894880
Quite personally, I would suggest MIUI. If you're not into that kind of thing, I would suggest Deck's, who updated to stable yesterday!
Kernel, I would say Tiamat 4.0.8.
Look up Vipermod. Check my signature. Most phones can at least handle a -50 undervolt for the Tiamat mentioned above.
I would suggest the flashable GPS fix in my signature. Locks on quite accurately.
You may have a lot of cell standby drain. Check development section for a thread about Radio wakelock combination.
Best way to change the density would be to edit the build.prop but there are apps in the Market. Just search density changer
Sent from my PC36100 using xda premium
Flash Flash Flash
Then you will be able to find out what you like.
AOSP is always a winner for me.
Oh, and make sure you Nandroid.
I agree with both posts above, you have to try out roms for yourself since in every rom post you will see someone saying this is the best rom they have ever hadand battery life is super. Your question has been asked a million times before but like that millions of answers that were given it all boils down to personal choice.
I run AOSP with an sbc kernel but Lord knows you may find people here who would dispute the use of an sbc kernel. LCD Density apps are in the market or just use google for help. Sorry this is not a definitive answer but honestly just find a rom you like and give it a shot....
Thanks for all your answers time to get flash happy!
Sent from my PC36100 using xda premium
For me the best combo of performance and battery life has been SavagedZen and CM7. Completely transformed my perception of just well the evo should perform. Basically no compromises, Fast AND great battery life.
I'm using MikG 2.56 ROM with Aggressive Freedom kernel. Holding up pretty good.
For me the best combo is Decks Rom 1.3 + SavagedZen Kernel + Vipermod
I can get about 16 hours on MikG 2.56 (stock kernel) with moderate use. Damn near perfect ROM.
sai_iii said:
For me the best combo of performance and battery life has been SavagedZen and CM7. Completely transformed my perception of just well the evo should perform. Basically no compromises, Fast AND great battery life.
Click to expand...
Click to collapse
Which version of CM7 are you running? I'm on the 219 nightly and it kind of meh. I've tried savaged Zen with CM7.1 and it was good but my battery didn't seem to last as long during use so I decided to move on to other kernels. Are you running any supplementary battery apps?

Which custom kernel should I use with ARHD?

Would someone mind explaining the advantages of each one over the default as loads have suddenly popped up and it's a new area for me? (http://forum.xda-developers.com/showthread.php?t=1654982)
I am using faux kernel with ARHD and it is working flawlessly and i have now better battery life.
Use the repacked version of faux kernel.
Why everyone didnt just sit round an e-table and make one 'amazing' kernel instead of there being loads is beyond me, but this could be a good thread.
like most, my One X is my daily driver and swapping out Roms/kernels and mods isnt something i have the time to do.
Faux' has been attributed to better battery life, and it would be nice to know what the other kernels offer in difference to stock.
The changelogs mean nothing to anyone who doesnt understand what an I/O scheduler is, if you know what i mean.
Paul
You can ask the same about the problems with multiple linux distros. I think this is a open source thing.

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