HTC Incredible :: ROM Flashing - Stable Kernel?
Nov 27, 2010
I have a rooted Droid Incredible, running stock 2.2 and Hydra's 1.15 ghz kernel. I found a ROM called "Light Speed," and I'm wondering if I should try it out. Here's the link: [ROM] Light Speed - Droid Forum - Verizon Droid & the Motorola Droid Forum I'm thinking of the sense version. Do you think it will work? Also, it says it features KingxKernel #6. Is this a stable kernel? How many ghz will it go to? Any other tips before I flash? (Ex. wipe, backup)
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Aug 18, 2010
What is the best/most stable overclock kernel for my Dinc. Im still running 2.1, dont plan on going to 2.2 yet. I have heard about hydrakernel but dont know which of the four from HERE to choose from.
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Jul 2, 2010
So I was under the impression that you could use ROM manager or ClockWork mod to install a custom kernel that I had downloaded to my SDcard. I downloaded a low-volt, overclock kernel and I have discovered that I don't quite know to flash it to my phone.
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Nov 14, 2010
if so I started loading it about 8 mins ago and the screen is staying black but the keys on the bottom are staying lit up. I have fascinate(hopefully not paperweight now). is this normal?
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Feb 22, 2010
there are so many different OC kernels out there I figure it would be good to have a poll to see which is everyone's favorite, not roms but actual OC kernels. Also when I mean fastest I dont mean highest ghz but fastest at the same clock speed
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Apr 26, 2010
From reading various posts, I feel like I'm one of the few that's not. I'm still flashing ROMs manually with SPRecovery update.zips and nandroid backups but I'm seriously thinking about using Koush's ROM manager. What are the advantages/disadvantages? Is it stable?
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Oct 3, 2012
I already have my mini x10 pro U20i rooted with CWM and Busybox and I have been looking for the latest most stable ROM to run on the stock kernel.
Preferably something that can install the apps onto SDCard And Works well in low signal strength areas I use apps mainly for PC Repair.
X10 specs
Model U20i
Firmware version 2.1 update 1 no other updates available
Baseband Version M76XX-TSNCJOYLM-5340-4015
Kernel Version 2.2.29 SEMCUser@SEMHost #1
Build Number 2.1.1.A0.6
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Oct 5, 2010
I recently rooted my Evo using UnRevoked 3.2 and flashed Fresh 3.3 on it. I'm generally happy with the results, the upgrade seemed to fix some problems with random reboots and screen locks I was having on stock (I'm thinking that moving a lot of apps to SD may have helped, as I seemed to be always low on memory).
In any case, I do think the phone is a bit "laggy" after the update. I downloaded FPS2D and checked my FPS, seem to average right around 50fps with std dev of 9. It seems like many people are getting much better screen performance using the custom netarchy 4.1.9 kernel. I'd like to give that a try but I have a couple of basic questions...
1. I will do a nandroid backup and Titanium before I flash, but I noticed that restoring apps last time was a drag...I use FolderOrganizer and it's a pain to get them all set up the way I had them. Does flashing the kernel wipe your phone clean? How much app/Sense restoring would I have to do assuming all goes well? I'm assuming that flashing the kernel has little to no effect on installed apps or Sense screen layouts...he cried hopefully...
2. I'm assuming here that Fresh 3.3 is compatible with netarchy 4.1.9, correct? Also, I saw an indication that netarchy 5.0 may be around the corner...is it better to wait? Or is reflashing a kernel that easy so there's no reason to wait?
3. It looks like an overclocking app is included in the netarchy kernel? Is it necessary to tweak the profiles, and if so what are the recommended tweaks for best performance? I have some experience with this coming from an overclocked Palm Pre, but I care a lot more about my Evo...I don't want to hurt it!
4. Battery performance is less of a concern than screen performance for me...I have chargers everywhere. Still, I'd like to get the best battery performance I can. I believe there may be "rogue" services on my phone that are eating up the battery (for example, I use Exchange ActiveSync and I turned it off recently because sync problems were causing it to stay on in the background). What's a good way (or app) to identify rogue apps/services and kill them?
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Sep 6, 2010
Decided to try Snap's 7.5 kernel. Did a full wipe and flash with cm6 but lost wifi. Tried nandroiding back and still no wifi. So, wifi is broken. How do I fix it?
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Apr 9, 2013
Can i install kernel after flashing my new rom?.I mean i flashed my rom and can i now update my kernel without flashing rom again.
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Jun 16, 2013
I hear that some kernals are better than others and I assumed they change when you change your ROM but I'm not sure. I feel like I would have better battery life with a better kernel.
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Nov 15, 2012
I did a research regarding Flashing Kernels and Roms and currently i have installed Cyanogen 9.1 for my device.
1.Will I be able to update my phone and bring back to old ICS firmware via SUS once i brick my phone(I have already unlocked the bootloader via fastboot method)?
2.Evrytime when i flash the Rom(say CM9) i used to flash kernal(boot.img) for the respective rom.Is this necessary all the time? Will i able to flash a GB rom on ICS kernal(I am afraid to give it a test)?
3.Regarding CM9.1 which i have installed ryt now,I am satisfied with the performance,but i want a stable ROM wud make me happy with a better battery life unlike CM9.1. Any GB/ICS ROM which wud have a stable performance with descent battery life.
4.After using GB for a long time,i was very much addicted with the Phone pad kinda keyboard,but when ICS came into picture everything vanished,Smartkeyboard Pro is no gud,Touchpal is conjusted,i want the exact GB keyboard in ICS.
Phone: Xperia Ray
Bootloacker:Unlocked
ROM: GB Stock Rom
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May 19, 2010
what would happen if i flashed the galaxy kernel on my behold 2? or any other kernel for that matter... i am sort of new to this but i know alot of things too. so is this possible?
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Feb 15, 2010
I decided to split this off to a new thread, and hope some coders will join in and start compiling a kernel. We could then merge this with the galaxy asop effort.
Here's a bit more technical information.
Galaxy
The galaxy flash files are just yaffs images and a zimage (and of course AMSS) all tarred up. The tar format needs to be oldgnu for odin to accept it.
There's no protection at all. Thats because the glaxy is released completly security unlocked (simlocks are different, not the same thing). You can flash any image you like.
AMSS - arm ELF binary for baseband
kernel - zimage
system - standard yaffs image
recovery - standard recovery format
tar - oldgnu style standard tar file
The Galaxy also has a mtd device driver which means you can read/write its partitions with dd.
/dev/mtd
Behold 2
The behold has the same image format, yaffs, zimage and AMSS. See below for specific differences per image:
AMSS - arm ELF binary for baseband
The behold 2 also contains a partitions file. This is most likely for the AMSS, and allows the layout of the baseband to change. I'm not sure if the galaxy supports the same, but probably does.
Its safe to say you should NOT try to flash an AMSS from galaxy to the behold or vice versa.
Since the radios have the same functionality, and we don't know how to recompile and AMSS, you should never flash any new AMSS with a custom rom. Only flash AMSS with official updates.
> kernel - zimage
Just like the Galaxy this is a standard zimage. There's nothing special about it and you can modify it however you want. BUT in order for it to flash the tar file needs a special header (see tar below)
Since we can change the kernel, upgrades to newer OS versions is now possible.
> System - standard yaffs image
It appears the system image format on the behold2 is DIFFERENT to that on the galaxy. If you flash a galaxy system file onto the behold 2 you will most likely end up with a brick.
I suspect the behold 2 file has the flash address embedded inside it. Flashing the galaxy system file writes to a bad address killing the bootloader. When i say BRICK i really mean BRICK. No life in the phone at all, it wont even charge. so DONT DO IT!
In order to write a custom system to the behold 2, we will need to untar or unyaffs the modified system from the sdcard on first boot. This can easily be accomodated in the init.rc of you're modified zimage.
> Recovery - standard recovery format (protected?)
The recovery image format seems to be the same - standard android format with a ramdisk, kernel etc. However flashing it using odin doesnt work. There is some sort of protection which is preventing the image being flashed. I havnt looked thoroughly at this and someone really should. I suspect either it is signed (unlikely since the other images dont seem to be protected), or there is a write address embedded in the file, like the system file.
It would be nice to be able to flash a custom recovery, or even boot from a ramdisk, but I think this wont be simple.
> tar - oldgnu style standard tar file (with header)
Both the galaxy and behold2 have a header at the top of tar. The galaxy will flash regardless of if this header is intact or not. The behold 2 however MUST have this header intact for it to flash anything.
It seems this header contains the size, and write address of the zimage. Its possible the addresses of other images like the recovery are embedded in this too. We should look more closely at this header, especially between firmware versions to see what changes. In the mean time to replace the zimage, just hexedit your new image over the existing 'kernel' file in the tar. Remember you need to keep the size the same, so pad with zero's or just leave the remainder of the old kernel in the extra space.
Progress?
The sources that samsung provided are missing patches. This means you can't compile the behold kernel simply.
Also because the partitions are different, and the memory layout is different (compare msm/board-init files) a standard galaxy kernel will not boot.
Making the changes to get it to boot are not that dificult. It would be nice if someone who actually has a behold 2 and linux knowledge could have a look at this. It takes far to long for me to do this remotly, and frankly I just dont have that much time.
All you need to do is:
- compile the galaxy kernel (test your environment)
- replace board-init in the galaxy source with that from behold2 sources
- turn on linux console
Now boot and check if the galaxy kernel is able to see device's for each partition on the behold. If not you'll need to copy the disk/flash driver from the behold 2 sources.
Once you are able to get that far, you can merge the changes into the i7500 asop project and add a kernel switch for the behold 2. Now all galaxy 2.x progress will be directly transferable to the behold2.
You will need to make a change to the init.rc to mount the drives and unyaffs the modified system.img the first time it boots. Again a simple change.
Forgot to mention HOW to flash a kernel.
1) Take the stock behold 2 PDA tar file.
2) Use jzip (must be jzip on windows, winzip etc wont work) to remove ALL files except the kernel.
3) Extract the kernel file for reference (leave it in the tar too)
3) Download HexWorkshop or similar Hex utility.
4) Use Hex Workshop compare function to compare 'kernel' and the tar. It will highlight the kernel in the tar file
5) Open new kernel in Hexworkshop. Select all and Copy
6) Highlight the same number of bytes in the tar file and paste over the original kernel
7) Flash with Odin (JUST this tar) as PDA, and of course selecting the behold ops file.
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Jun 25, 2010
Do most people always backup the ROM, w/ ROM manager before installing new kernels?
Also is there a way to set the number of backups you keep w/ ROM manager?
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Feb 15, 2012
I got a rooted phone. how do i remove a kernel from my phone without flashing another rom?
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Oct 23, 2012
So I've been looking into flashing custom kernels, and I can't seem to find an answer to this question. Basically, I'm wondering if the kernel remains after installing a new nightly, or do I have to reflash the kernel every time the ROM updates?
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Feb 25, 2012
When I got my phone at the end of last year I rooted it using a Chain-Fire kernel - v 4.2, I think. After flashing, it worked perfectly, since when I have flashed the old bootloader to get my USB Jig working to remove the yellow triangle and flashed a patch again to allow the USB Jig to reset the binary counter.
I have very much wanted to install and get the new Sky Go application working.
What I had to do was flash the Stock kernel for my Stock Rom - I have never messed with my Rom - it is Gingerbread 2.3.4 in a CPW phone here in the UK.
Doing the flash and installing Voodoo OTA (to temporarily hide my root) has been enormously successful
Now then to my query....
The original Chain-Fire mod v 4.2 installed CWM.
After of course cancelling the "hide root" function to show my phone as rooted once more, I went to do a backup, using CWM but it refuses to work. It says my kernel needs v 5.0. Obviously the Stock Rom I flashed to get Sky Go working has thrown CWM some what.
I have downloaded Rom Manager from the Market but this seems not to work either - it starts to work (reboots) but then halts with the following messages: -
E : failed to verify whole-file signature
E : signature verification failed
Installation aborted
What I would like is some way of installing a backup previously made before flashing the Stock kernal and also to make a fresh backup now.
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Sep 15, 2012
is it possible to unlock samsung galaxy s plus (i9001) by installing any of the moded firmwares/kernels?
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Feb 15, 2012
[Q] IS IT NECESSARY TO UNLOCK BOOTLOADER BEFORE FLASHING KERNEL FOR SONY XPERIA... and also need a latest flashtool tutorial link..
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Jan 2, 2014
I have an xperia X8 with some naa kernel and xperiadroidx 6.1.The thing is that with this custom kernel and ROM when i put a SIM from another network carrier, the question asking for the SIM-unlock code input is not showing up. (this appeared before when phone was in stock state).Is it possible to do it without re-flashing to stock?
...or i have to put back the phone to stock? What is the easiest/safest/best way to do this? using the restore option in "PC companion" SE app? Is it only needed to put the stock kernel and ROM, or Do i also need to re-lock the bootloader?
I don't need the whole explanation, just a little guidance, just a few tips to know what to do, then i can google/search myself for the specifics on how to actually do it.
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Nov 20, 2013
I have samsung galaxy pocket duos gt s5302..I have rooted it and flashed CWM recovery then I tried to flash custom compact kernel made by Deadly. After I flashed through CWM my phone got hard bricked It wont turn on What should I do?
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Sep 3, 2010
Read in the past where things weren't working such as camera, bluetooth, GPS, LED notifications, etc. And then I stopped paying attention for about a month But now, my phone is bugging me every 30 minutes that an update is available, so I either have to move to stock 2.2 or something else, so would much rather have vanilla. So was just wondering if there are any vanilla Froyo builds with everything working? I see that two of them are in RC status, but are they stable enough to use without major headaches?
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Sep 30, 2010
I rooted my phone back before 2.2 came out. I've played with CWM, made Nandroid and Titanium backups, removed bloat and installed most of the root only apps. What I haven't done yet is flash a ROM. This is mainly because it seems that while there are a crap ton of ROMs being developed out there all of them seem to either not be fully stable or are missing some sort of key feature (camera, videocam, bluetooth, LED, internal storage, etc).
Are there any ROMs that you folks are currently using that's stable and has all the features of the phone working? If not, what's the closest one that you've found?
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May 21, 2010
Flashing HTC Droid Incredible to Cricket...?
Has anyone flashed HTC Droid Incredible yet...?
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Sep 12, 2010
I just installed the Virtuous 2.6 ROM and tried to install King BFS Kernel 4 but it put my phone in a reboot loop.What kernel should I use with this ROM?
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Jul 1, 2010
Does anyone have a copy of the regular stock kernel for the Dinc?
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Oct 22, 2010
Using rom manager i downloaded a virtuous rom and want to try a kernel....how do i download a kernel....and if i do will i have to download titantium backup and upload the backup again...in other words treat it just like downloading a rom?
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Sep 10, 2010
Is there a Kernel that allows us to charge like before 2.2? I tested the Inc with an ammeter on stock 2.2 and on SR 3.0 RC2 and both charge at only half the current we used to on 2.1. That is unacceptable and the reason a lot of people can't keep their phones charged while using GPS anymore. Surely there's a fix so far?
On a side note, any good kernel recommendations or a list where I can peruse our options and their features. Still running whatever kernel comes with SR 3.0 RC2.
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Nov 18, 2010
Does anybody know if the new desktop kernel patch written by Mike Galbraith can be applied or modified to be used in the android kernel?
Tiny Linux Kernel Patch Delivers Huge Speed Boost - PCWorld Business Center
I haven't messed around with android kernels yet, but I have applied it to my current Ubuntu 10.10 system and you can see the difference. Its like night & day!
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