HTC EVO 4G :: WIFI Lost After Flashing Kernel

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?

HTC EVO 4G :: WIFI lost after flashing kernel


HTC EVO 4G :: Flashing New Kernel Over Fresh 3.3

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 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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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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General :: Kernel Installation After Flashing New ROM?

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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General :: When Flashing A New ROM Does It Change Kernel Also

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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General :: Xperia Ray - Flashing Kernel

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
ROM: GB Stock Rom

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General :: Lost IMEI While Flashing ROM

Oct 17, 2013

I have xtouch X1 with MT6589 SoC. have lost my IMEI while flashing a Rom i have tried many different methods but none has worked and in baseband version it says unknown and whenever i try to type in IMEI via engineering menu it says can't send AT command and i have flashed back to my stock rom via SP Flash Tools but even that didn't work, I have tried terminal emulator method MTK Droid tools method but none has worked even tried to replace the file of IMEI one but still same.

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HTC Incredible :: Flashing Custom Kernel Using ROM Manager?

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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Samsung Behold 2 :: Flashing Galaxy Kernel ?

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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Samsung Behold 2 :: Flashing Kernel And Security ?

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.


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.


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.


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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Motorola Droid :: Backup ROM Before Flashing A New Kernel?

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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General :: How To Remove Kernel From Phone Without Flashing

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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General :: Flashing Custom Kernel After ROM Update?

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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Samsung Captivate :: Lost GPS Flashing Icon ?

Jul 23, 2010

Today I lost my GPS flashing icon at the top of the screen and my GPS will not connect. I checked my settings and both the wireless and the GPS are clicked on. Any ideas?

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General :: SGS2 (GT-I9100) Recovery After Flashing Kernel?

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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General :: Unlock I9001 By Flashing Firmware / Kernel

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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Motorola Droid :: Tried Flashing Newest BB - Lost 3G Service

Jun 9, 2010

I attempted to flash Pete's newest Froyo build. Did a wipe of data/cache, but my phone said the file was bad. Now for some reason I don't have 3G service. I've flashed every nandroid backup I had saved but I can't get it back. Any idea how I might be able to fix this?

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General :: How To Unlock Bootloader Before Flashing Kernel For Sony Xperia

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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General :: How To Enter Sim Unlock Network Code After Flashing To Custom Kernel / ROM

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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General :: Samsung Galaxy Ace 5830 - Lost Data Connection And Msg After Flashing ROM

Dec 17, 2012

everytime i installed a custom ROM preferrably CM7 Apocalypse, i always lost my data connection, i dont know why this thing happen, then last time i installed CM7 Apocalypse again (changelog dated 9/7/2012 by itasoulas) i still lost Data Connection though i follow the instructions given, plus i cant receive a message even though i installed a messaging app. im tired im reflashing my phone back to Stock Rom over and over again .

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General :: Samsung GT S5302 Hard Bricked After Flashing Custom Compact Kernel

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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HTC EVO 4G :: WiFi Tether - Flashing New ROM And Radios

Sep 26, 2010

I have a stock 2.2 and have not done the recent OTA nor have ever been rooted. Can you do the OTA first, then 3.21 and be rooted for purposes of tethering? My concern with flashing a new ROM and radios (to get the latest stock ROM) is that some apps may no longer run, especially HTC Sync which I like using with Outlook, FM Radio, Audible, etc.

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Motorola Droid :: What's Kernel I Need For WiFi Tethering

Apr 23, 2010

Which kernel do I need for 2.1 and wifi tether if I do not wish to modify the clock speed at all?

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HTC EVO 4G :: WiFi And Bluetooth Headset / Flashing Screen

Jun 5, 2010

My friend and I were both talking on our EVOs through BT headsets and we both experienced random flashing on/off of the screen. My WiFi would not connect while I was on the phone. I reset my Evo and was able to connect to my WiFi network, but again once I got on the phone with my friend my WiFi connection became unreliable, and both our screens would randomly and intermittently flash on/off. I had this same problem with my Treo Pro, and I'm guessing it's because both WiFi and bluetooth use 2.4ghz, but I know it works on other phones and was hoping it would be seamless with the Evo. My friend didn't seem to have any trouble with his WiFi connection while on the phone, but he did experience the screen flashing, so I'm thinking that's a phone bug, but I'm not sure what to think about the WiFi connection issue. Anyone else experiencing anything like this? Doesn't seem like too many people use WiFi and talk on a Bluetooth headset at the same time.

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General :: Samsung Galaxy S3 - 2 Flashing Arrows Under WiFi Bar

Oct 9, 2012

On my Samsung galaxy s3 I have 2 flashing arrows under my wifi bar.. I went to Samsungs chat and the first time I was told that it was because I was transfering data but I wasn't. She then told me to do a soft reset so it did and it still continued. Then I went back on because the first person told me it would eat up my data if I didn't break the transfer. The second lady said that all that means is that it's showing that it's connected to my router and is normal and won't use my data..

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HTC Droid Eris :: Weak Signal Of Wifi Connection And Lost

Nov 19, 2009

New to Eris and have set up Wifi to connect to home router (Verizon FIOS Actiontec). Successfully connected (accepted WEP) but get very weak signal and then lose connection. I've turned off "Mobile Network" but still have this problem. I am one room away from router and receive full signal on iMac and printer but only a dot under the Wifi symbol on the Eris. Exchanged a Motorola Droid (which received and held full signal -- as did my prior iPhone)) for Eris. VZW tech support clueless and immediately sent me to HTC support. While they tried (had some not very good explanations -- battery not pushing enough power) still nothing working. Any advice/help would be greatly appreciated -- this is the only downside right now.

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HTC Eris :: Wifi Tether - Lost Internet Connection At Work

Apr 1, 2010

for whatever reason today we lost our internet connection at work. Now I work for an airline doing charters and today we added a second flight to each shift. So I tethered my phone for the 3g and just plugged it in at the end of the day to charge it. Needless to say it handeled 300 passengers/customers easy. Changes, bag fees, checking in and selling for a solid 8hrs today! I don't think I'll ever get another cell phone ever. Maybe a bigger SD, but phone, probably not.

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General :: Rooted SCH I535 Verizon And Lost WiFi 4G Functionally

Apr 30, 2013

Rooted my SCH I535 running on Verizon.

Used ODIN3-v1.85 and these files:

Now wifi and 4G functionally lost. They only work sporadically and unreliably.

Should I find the stock ROM and reflash?

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General :: GSM / GPRS Signal Get Lost When WiFi Get Activated / Deactivated?

Jul 21, 2012

phone: global samsung Note 2.3.6

Phone when has 3G or GSM/GPRS signal, this signal get lost(I can not receive/accept calls_phone needs reboot to find signal) when wifi get activated/deactivated... well?

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General :: Xperia Play - Lost All Saved Settings And WiFi Keeps Turning Off?

Jan 31, 2013

I've been having problems with my Xperia Play. Any app involving the internet would force close after being on it for a certain amount of time, which was no big deal, I would just restart my phone. But then it started happening more frequently, and it would force close sooner, sometimes even force closing as soon as I entered the app. Then this morning, I found that my WiFi was off (which was weird because i don't turn off WiFi at home). I went into my settings to turn it back on, locked my phone, and went to do something else. When I went to check Facebook, I saw that the WiFi wasn't on. So again, I went into settings, but instead of just pushing "Turn on Wi-Fi", I went into "Wi-Fi Settings". I saw that I had lost all my saved WiFi networks (including my house), and it wasn't picking any up, even though I know that there are multiple in my area. I tried re-entering my home WiFi settings, but that still didn't work. I did a few more times, then when it still failed, I restarted my phone and tried again. Still nothing. Then I went out, and was still unable to pick up any WiFi, and any internet based apps still weren't working, even with 3G on.

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