How does one flash a kernel?


  1. Thefoodman52

    Thefoodman52 Well-Known Member

    I'm going on and trying my best to root here.... but I just can NOT for the life of me, after about... damn... three hours of searching, find anything about how to flash or install (whatever you would call it) a kernal. Through the XDA guide, here. Thing is, I THINK this guide is for basically rooting your phone and putting a stock 2.2 rom on it, and...from what I understand... it's the uhh.... nand unlocked version or something?? :confused:

    I know from reading that means it's full root and allows me to do essentially everything I want to... without altering, ruining/breaking any major phone functions (WiMax radio, FM tuner, GPS, WiFi, etc.). However, it does NOT unlock the framerate cap that I'm trying to escape. I've found a kernal here that I think is what I need to do what I want; escape the FPS cap without fudging up anything else on the phone.

    My question is as follows.... through the whole video and text guide of rooting stock 2.2 on my phone courtesy of XDA, no where does it mention any way or how to flash/install a kernal. I can't find a guide anywhere on how to do so either, there are no posts here that I can find, from an hour of searching and desperately reading, for anything and everything related to kernals or roms for the Evo or any phone.

    Can someone instruct me, please, on how to flash a kernal? I can't root tonight, as has become apparent to me because I've spent about 9 hours today trying to figure out how to do anything, primarilybecause nowhere I go to seems to give me any help. I have full on intentions to get my root on tomorrow, I feel I've got about 60% of it understood of what I'm doing, but I just can NOT find how to flash a *sparkling jesus* kernal anywhere!!!

    Any help is appreciated, links to a guide, a PM on how to, an e-mail, anything!

    I'll continue to bump this until I can either:
    a) find the information on my own
    b) someone aids me in locating said information
    c) someone helps me out via instructions

    I think I'm the only one who thought rooting was gonna be a one day thing.... :(

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  2. exBBuser

    exBBuser Well-Known Member

    I already answer this for you on a different thread. The process is a simple as flashing a ROM, put the .zip on ur sdcard, go into recovery,wipe cache,dalvik-cache, install .zip from sdcard, reboot phone and ur done.
  3. Thefoodman52

    Thefoodman52 Well-Known Member

    Alright, my bad. I see what you meant in the other thread now... was just re-reading over it again.... god I feel stupid... I'm just frustrated and not thinking straight as I should...

    Going off the guide from XDA, I've got everything downloaded and I'm in the process of downgrading to 2.1 as I type now. After I get the stock 2.2 rom running on there, after it's all done, I'm rooted, etc., which step should I go back to to install the kernal and do all this?

    Also, is there literally an option labeled as 'wipe cache', as well as install .zip from sdcard and etc. once in recovery mode?
  4. tracerit

    tracerit Well-Known Member

    when you're in the white hboot screen after you press vol down and power, choose RECOVERY > WIPE > and you'll see the options to WIPE CACHE and WIPE DAVLIK-CACHE. Then click on RETURN and install ZIP FROM SDCARD and REBOOT. pretty much what exBuster said.
  5. Thefoodman52

    Thefoodman52 Well-Known Member

    Okay, well this is interesting, I'm at the point in the unrEvoked root where it's stuck at "Waiting for root". Wtf did I do wrong??


    Need help, stuck here, I'm about 80% done with the whole root process, I just need to get past this!!
  6. Thefoodman52

    Thefoodman52 Well-Known Member

    It seems to not want to go into recovery mode after the unrevoked program does its think.... what ****** up??
  7. Thefoodman52

    Thefoodman52 Well-Known Member

    Thank you for all the help exBBuser, sorry for making you mad at me... =(

    However, OH MY GAWD glad I rooted! everything is baby butt smooth now! Thanks to the kernel change. I thoroughly will enjoy this, and thank you eternally.
  8. exBBuser

    exBBuser Well-Known Member

    Yourwelcome. Good to hear that u r finally rooted.
  9. hellcatt

    hellcatt Well-Known Member

    what exactly does that wipe? is that a full wipe? im scared:eek:
  10. surfologist87

    surfologist87 Well-Known Member

    No, its not a full wipe.
    But you have to wipe the cache and the dalvik before flashing any kernel.

    I dont know exactly why though. haha
  11. hellcatt

    hellcatt Well-Known Member

    ok so i deleted the cache (both of them) and flashed this kernal [KERNEL] [2.6.32.15] [HAVS][BFS][BFQ][FPS][OC][UV] KiNgxKernel #8/#9 "Still Alive" - xda-developers. now mu phone is lagging and slow to respond, also takes forever to boot up and its just overall a turtle. i did do a nandroid back up, do i need to run that or can i just delete the kernal?

    edit: so i restored my back up, booted up in 2 mins and is smooth as silk. are there other kernals to try or anyone know of 1 thats a sure thing?
  12. novox77

    novox77 Leeeroy Jennnkinnns! VIP Member

    That kernel didn't sit well with my stock ROM either. Not sure why. Others have no issue with it. You can try the netarchy series of kernels. See my sig. I would go with a CFS kernel instead of a BFS one.

    BTW, you probably could have gotten away with just flashing a new kernel on top of the Kingx one to fix the lag. Note that on Netarchy's OP, he gives you a download of the stock kernel in case you ever need it.
  13. hellcatt

    hellcatt Well-Known Member

    thanks, so i checked that link you got and had no idea wtf i was looking at lol
  14. novox77

    novox77 Leeeroy Jennnkinnns! VIP Member

    This is what you want.

    Revision 4.1.8-cfs edition
  15. hellcatt

    hellcatt Well-Known Member

    cool thanks

    54 fps, benchmark is now down to 1220 and lost 8% battery in 5 minutes. is this what i really want?
  16. slugbug

    slugbug Well-Known Member

    Thanks, LOTS easier than I thought. I'm getting more comfortable with the going into recovery, etc.

    Just flashed my first kernel to my new rom :)

    Next up.....themes!
  17. exBBuser

    exBBuser Well-Known Member

    Themes are pretty easy to flash to,followed the same steps as flashing a Kernel,make sure you do a nand backup,once you apply the theme theres no going back.
  18. Wile-E

    Wile-E Active Member

    One important caveat: people have been reporting less then complete wipes of the caches when using clockworkmod. To switch temporarily to Amon RA, download it to the root of your SD card. Then open ROM Manager and hit "Flash Alternate Recovery" (select Amon Ra). Reboot into recovery, wipe the caches, install the kernel. Then, if you like, just reboot and go to Rom Manager and switch back to Clockworkmod.

    I didn't believe there was an issue until I tried it myself. It cleared up a lot of stuttering on the audio and when unlocking the phone.
  19. beccaannabell

    beccaannabell Member

    I am trying to do the flash of this kernel
    I am in recovery mode.
    I went to Wipe
    I did the wipe of the dalvik-cache
    Returned.
    When I click on flash zip from sdcard the file isn't there.

    It is saved on my SD card though.
  20. wrapkgb

    wrapkgb Well-Known Member

    Are you sure it is saved as a .zip file?
  21. jprow507

    jprow507 Well-Known Member

    I have been flashing kernels for a little while and ONLY wiped Dalvik cache and not noticed any problems. Is it necessary to wipe the other cache? I hadn't been doing this as I was thinking the other cache contained my settings and would be like a full wipe which i guess it isn't?
  22. bklein84

    bklein84 New Member

    I just did exactly that. Wiped cache and dalvik-cache, installed the .zip for kernel 2.6.37.6 and now my phone won't boot. stuck on the htc EVO 4G screen with the white background... wat do?!
  23. evomattnc

    evomattnc Well-Known Member


    What rom and what kernel exactly?
  24. esthernrob

    esthernrob Well-Known Member

    [​IMG]


    EDIT - just kidding....
    Granite1 likes this.
  25. 9to5cynic

    9to5cynic Well-Known Member

    ^LMAO. Just made my night.

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