Database Info

How to Port a ROM to Milestone2

As lately some people are asking me about ROM porting I decided to create this new thread where we can share knowledge about this hard task.
Please note this is a Dev talk thread, so DON'T ASK about fixing a particular ROM problem here. Also don't ask questions like "My phone is bricked! please help!". This IS NOT the appropriate place for it. There are plenty of other threads to help you out.
Also note that this is not a step by step guide (and not a guide at all), it's just a point where you can start from. Android is a very complex system and there are many things I don't know yet. So, research and hard work is what you need to learn it deeply. My first tip is Google really works. Don't be afraid to search
Ok, to the basics. Porting a ROM is no simple task. It requires advanced understanding of how android works and how it is organized. Previous Linux/Unix knowledge helps A LOT. As android is based on this O.S. there are many similarities between both. In fact many ppl consider android to be a kind of linux distro.
The very first task to port a ROM is finding a device which is compatible with your own. For example Defy/Milestone2. Then you are going to choose a ROM to port to your device.
As our devices (Milestone2) have a locked bootloader we now need to find a system image that have a compatible kernel with the ROM we are trying to port. This is mainly based on trial and test and takes a long time. You'll be ending flashing your phone several times with RSD Lite. You should learn how to use MotoAndroidDepacker and how to create a fixed SBF.
The basic procedure to try that:
1. Open original ROM update.zip and remove any files/commands that flashes boot/devtree/recovery/anything.
2. Install this new file on your phone via CW Recovery.
3. Boot into bootmenu and enable ADB so you can read logcat while phone boots.
4. Choose Boot/Normal. If your ROM uses 2nd-init you will need to place/edit/adapt bootscripts into bootmenu 2nd-init folder.
5. Check logcat for errors:
- If you're getting HAL errors you're going to need a new kernel;
- If you can start android without getting HAL errors but still getting errors and bootloop on android animation you should try to replace libs with appropriate original ones.
6. Once you are able to boot android you should test it's features to see what needs to be fixed.
This is what I have to say for now. The thread is now open for discussion.

At this week, motorola has just pushed the GB official update for Droid 2 and Droid 2 Global....
Can i try to port this new rom to milestone 2 and after a success boot, fix the radio..??
I was asking that, because some people has success on port CM7 to milestone 1, when it originally maked for droid 1...
tks a lot..!!

jorgebaruchi said:
At this week, motorola has just pushed the GB official update for Droid 2 and Droid 2 Global....
Can i try to port this new rom to milestone 2 and after a success boot, fix the radio..??
I was asking that, because some people has success on port CM7 to milestone 1, when it originally maked for droid 1...
tks a lot..!!
Click to expand...
Click to collapse
It may be possible, but you'll have a hard time fixing the baseband.
You may have to mod the init.rc scripts and find the right radio binaries (rild is one of them) and drivers.
Ask those ms1 people for help, if they are still with the same phone...
Sent from my Milestone 2 XDA App

I don't know if this will be relevant or not.
I wanted to know if to do any of this, having a Linux distro as OS a must or can I try my hands at it on a windows based machine. I mean I'm sure that a Linux distro will give certain advantages (as Android is based on UNIX/Linux) but can we get things to work a 100% on windows.
If yes, then will someone be kind enough to get give the list of all softwares etc. which will be required to do the job on Windows machine as well as a Linux machine.
I do know a few softwares but I'm not sure if I have an exhaustive list. I would like to learn and try and at least be able to modify in bits n pieces to begin with.
I apologize if this wasn't supposed to be asked in this thread.

The only thing i can get from SBF is a bunch of smg files.
But the only ones i can open are
preinstall.smg
CG39.smg
Is there a way to open/see the rest?
2)
Im trying to modify the CM7 rom, what boot does it use? 2nd-init or 2nd-boot?

i guess it is second-init. but not sure

thanks a lot for this !!!

WeeDv2 said:
The only thing i can get from SBF is a bunch of smg files.
But the only ones i can open are
preinstall.smg
CG39.smg
Is there a way to open/see the rest?
2)
Im trying to modify the CM7 rom, what boot does it use? 2nd-init or 2nd-boot?
Click to expand...
Click to collapse
SMG files are disk images of certain partitions of your flash memory.
You can only open CG39.smg and preinstall (CG66.smg) because they are the only images in ext3 format. The rest of images may be on ramdisk format or some proprietary format. For more details on partition codes take a look here:
http://and-developers.com/partitions:cdt
You may be able to open and see contents of other partitions but the only one that matters aside from system and preinstall is the boot partition (CG35.smg), which contains the init scripts we should mod in order to make they work with 2nd-init. Boot partition is in ramdrive format. More details here:
http://android-dls.com/wiki/index.php?title=HOWTO:_Unpack,_Edit,_and_Re-Pack_Boot_Images
http://elinux.org/Android_on_OMAP
It is easier to unpack boot image using Dsixda's Kitchen here:
http://forum.xda-developers.com/showthread.php?t=633246
Edit: To see what boot your CM7 uses just go inside /system/bootmenu/config and look for a file called default_bootmode.conf. That should be the boot method used. It's normally 2nd-init.

sahilarora911 said:
I don't know if this will be relevant or not.
I wanted to know if to do any of this, having a Linux distro as OS a must or can I try my hands at it on a windows based machine. I mean I'm sure that a Linux distro will give certain advantages (as Android is based on UNIX/Linux) but can we get things to work a 100% on windows.
If yes, then will someone be kind enough to get give the list of all softwares etc. which will be required to do the job on Windows machine as well as a Linux machine.
I do know a few softwares but I'm not sure if I have an exhaustive list. I would like to learn and try and at least be able to modify in bits n pieces to begin with.
I apologize if this wasn't supposed to be asked in this thread.
Click to expand...
Click to collapse
Don't worry, this is the right place
As for your question: yes you can work in windows if you like, but using at least a Linux VM is more productive. I don't have a full list of applications to give you, as different mods may require different tools, but I advice you to have at least:
- Notepad++ (essential for editing text files and keeping linux end-line format);
- dsixda's Android Kitchen (http://forum.xda-developers.com/showthread.php?t=633246)
- 7zip (or some other compress tool you like)
- Moded putty for ADB as working with windows command prompt really suck (http://forum.xda-developers.com/showthread.php?t=803225)
- Oracle Virtual Box (if you are going to use linux VM).

r2beta0 said:
SMG files are disk images of certain partitions of your flash memory.
You can only open CG39.smg and preinstall (CG66.smg) because they are the only images in ext3 format. The rest of images may be on ramdisk format or some proprietary format. For more details on partition codes take a look here:
http://and-developers.com/partitions:cdt
You may be able to open and see contents of other partitions but the only one that matters aside from system and preinstall is the boot partition (CG35.smg), which contains the init scripts we should mod in order to make they work with 2nd-init. Boot partition is in ramdrive format. More details here:
http://android-dls.com/wiki/index.php?title=HOWTO:_Unpack,_Edit,_and_Re-Pack_Boot_Images
http://elinux.org/Android_on_OMAP
It is easier to unpack boot image using Dsixda's Kitchen here:
http://forum.xda-developers.com/showthread.php?t=633246
Edit: To see what boot your CM7 uses just go inside /system/bootmenu/config and look for a file called default_bootmode.conf. That should be the boot method used. It's normally 2nd-init.
Click to expand...
Click to collapse
Thanks again r2beta

thanks r2beta0
- Notepad++ -- got it
- dsixda's Android Kitchen -- downloaded (need some link for a how-to on its usage)
- 7zip -- got it
- Moded putty for ADB -- got it
- Oracle Virtual Box -- can't install Linux on my system as this is a work machine
dunno if I can do without the last option.

sahilarora911 said:
thanks r2beta0
- Notepad++ -- got it
- dsixda's Android Kitchen -- downloaded (need some link for a how-to on its usage)
- 7zip -- got it
- Moded putty for ADB -- got it
- Oracle Virtual Box -- can't install Linux on my system as this is a work machine
dunno if I can do without the last option.
Click to expand...
Click to collapse
Oracle Virtual Box is an application that lets you run an operational system on a virtual machine, in other words, it doesn't install linux on your real computer. It's a very useful tool that I use everyday. Google for it and learn a bit, you won't be disappointed. About kitchen: the link I provided was download + guide. Read it again. If necessary read the full thread.

r2beta0 said:
Oracle Virtual Box is an application that lets you run an operational system on a virtual machine, in other words, it doesn't install linux on your real computer. It's a very useful tool that I use everyday. Google for it and learn a bit, you won't be disappointed. About kitchen: the link I provided was download + guide. Read it again. If necessary read the full thread.
Click to expand...
Click to collapse
I know a bit about virtual box but as I said I'm not allowed to have softwares not approved by the IT team to be present on the system. Though I can get away with small things like notepad++ and 7-zip, having virtual box on my system may raise some eye brows.
I'm trying to arrange an alternative system.

Me neither. I must do almost everything at home, and at this very moment I simply don't have any free time. I'm afraid you're not going to see me here very often anymore (maybe in a few months? a year? well, it might be a bit too late for milestone2...)

hi. Have a question, I want to remove baseband from a flashable zip (lets say, CM7 from Tezet) , is it posible? I dont know where to look for it (baseband). Thanks!!

Baseband is located in \system\etc\motorola\bp_nvm_default\
But don't remove it, just replace it with files from ROM, which have baseband you want.

---UFO--- said:
Baseband is located in \system\etc\motorola\bp_nvm_default\
But don't remove it, just replace it with files from ROM, which have baseband you want.
Click to expand...
Click to collapse
Ok thanks for the info.
Sent from my A953 using XDA

Hi All,
Just a quick question. I have ported Paranoid Android 2.10 to MS2 but the problem I am facing is that Reboot goes through Bootmenu and I have to choose reboot from Bootmenu again.
Any inputs?
Thanks in advance

Megalith27 said:
Hi All,
Just a quick question. I have ported Paranoid Android 2.10 to MS2 but the problem I am facing is that Reboot goes through Bootmenu and I have to choose reboot from Bootmenu again.
Any inputs?
Thanks in advance
Click to expand...
Click to collapse
I meant to get to it last night, but I was tired after work and fell asleep watch tv. Eventually, later tonight, I'll be uploading PA for MS2. Check my Defy PA thread in 12-14 hours cause I'm about to go to work and I'm not gonna feel like making a MS2 PA thread or updating my Bravo PA thread -- but the Defy Thread is always up to date when I put out new roms.
Also, I'm looking to get either a Defy or MS2 -- I've heard that there's 3G issues with AT&T users (which I am) with the MS2 -- Apparently the MS2 has different 3G frequencies than AT&T. Are there any AT&T MS2 users who are knowledgeable about that? While I can deal with no 3G, edge only, calls only -- I need to make sure I can at least do that before I commit to something.
I'd rather have the MS2 because I want a hw keyboard and I don't have the $300+ to try and get a Photon Q LTE from eBay (and I don't have to change up my repos if I get a MS2). If anyone here knows of a phone that's AT&T compatible, Defy code compatible, and has a keyboard, please let me know.
Thanks.
//Normally I'd post the latter half in the Q&A section, but ya'll don't have one so I'm just gonna piggyback
//My Bravo doesn't have a Q&A page either -- it needs one that's not my PM box...Don't PM me on how to root your phone and flash CM7 -- read one of the 5 guides on the first page of both General & Dev...:silly:

Ok devs need some help here.
I am trying to port a rom to our Milestone 2...but it bootloops on rom animation.
I tried to logcat it but I don't think it gets as far as adb server to detect the device.and just keeps saying "waiting for device"...so I end up with no logcat to diagnose the problem.
I can logcat my current working rom but only after the phone boots....am i missing something here? please, help
Any help is very much appretiated.
Thanks a lot in advance

[Q] One Click Ubuntu installer for 3.1.10 kernel ?

Hi,
i'm currently thinking about installing ubuntu on TF101. I recently saw that new kernel 3.1.10 is becoming really stable and supports many tf101 features that 2.x kernel doesn't (in my opinion ubuntu with 2.x was more like a "proof of concept" than a real usable system)
So i think time is mature to a "one-click ubuntu" installer or, even better a dual boot rom with both android 4.0.3 AND ubuntu with 3.1.10 kernel (but i think maybe this technically will never be possible, what do you think ? ).
As today, installing ubuntu on tf101 is really too much of a hassle and, if you succeed (think about sbkv2 users using also wheelie) you then have to manually add files to upgrade kernel.
We are in 2012 and still using 1950's command line
What do you think ? could someone initiate this new project (i have a little knowledge, but really no time ).
Thanks !
TheMac

Eventually, It's on my list.
List:
1) APX 1-click root for peri.
2) APK version of peri..
3) scream at asus for patching root exploit (This is bound too happen..)
4) ???
5) Profit!
6) Workaround root for new patched firmware
7) Update PERI
8) Ubuntu 1-click installer.

Thing O Doom said:
Eventually, It's on my list.
List:
1) APX 1-click root for peri.
2) APK version of peri..
3) scream at asus for patching root exploit (This is bound too happen..)
4) ???
5) Profit!
6) Workaround root for new patched firmware
7) Update PERI
8) Ubuntu 1-click installer.
Click to expand...
Click to collapse
Uhm !
I like number 5 AND number 8
TheMac

I like the 1950's command line!!

still trying to finish my 1click installer foe Ubuntu on sbkv2 devices. Once that's done ill look into adding the newer kernel from jhinta. Ill see about making a 1click from that. If its all working.
Sent from my Transformer TF101 using xda premium

If kenshin is doing it im not gonna bother xD If he needs any help though I'm totally willing.

Thing O Doom said:
If kenshin is doing it im not gonna bother xD If he needs any help though I'm totally willing.
Click to expand...
Click to collapse
If you can do it, it would be better. I have been trying to rip apart exactly how everything is flashed still. Being slowed down from personal projects.

[Q] Keyboard on Ubuntu - I have no dock

Hi,
Any help is appreciated (I will push thanks button, for sure).
I am able to install Ubuntu with Frankstools. Dual boot with android works - I mean I can go into Android or Ubuntu. Have not let Ubuntu to go fully since I had some questions. I want to try the net-installer, but I do not have a dock
1. How do i get a tuchscreen keyboard that I can use on boot/setup (need to enter default password to get setup going).
2. In the regular Ubuntu install using Frankstools, do I need to load the jintha kernel during flashing? If so what do I need - I mean I know the thread, but not too sure how to use the kernel.
3. Is this kernel or similar kernel required for Ubuntu to boot completely.
Thansk to anybody in advance for answeres/input. Get your thanks button pushed !!!

dual boot samsung galaxy tab 2 with kali

All I have a p5113 and would like to keep the default rom. I have the most current official one now installed and rooted.
I have seen that there is a way to reboot the device and then use the volume key to pick which os to run.
I would like to run what i have currently
And add kali linux, as they have a arm releases available for download - i would think making a rom wouldnt be too hard.
But i haven't found good directions on what to do with the dual booting... unless you want to wipe out your current install.. and the best way to go about this.
Is there anyone that could maybe guide me along the process?
Guess I should mention I would like kali to boot from the external sd card, while default remains from internal

[Q] How and where to start modifying/customizing roms

Hello, first of all this is my first post, so im gonna introduce myself first,
I am a freelance web designer/developer and understands logical programming. Anyways i am basically new to android, and i want to learn how to edit/modify/customize stock roms. so first i want to learn extract these stock roms. I am currently on the starting phase and i only have some ideas about the terms / programs that is used in this forums. Basically, i am running a windows machine, OS is windows 7.
I find it hard to fix some bugs i encounter in my android which lead me to the goal of learning.
So for the device that i will use as a scapegoat for my learning venture, i am using a Skyworth x7010 tablet which have no more support, i think and not a very well known model, infact i cant seem to find any forums dedicated to the tablet itself.
I am technically knowledgable in computer hardware and windows OS, also i am able to write different type of websites in php, (forums, E-Commerce, social networking/networking website, company web based panels, etc.). As of now I am currently working alone in every web aspect of bagongpleion.com and bagongpleion.net.
So far this is what i have done, and done to the tablet. I have no backup as of now.
1. I have already bricked one, just made it perma bricked then returned for warranty, the staffs decided to mark it as defective motherboard (No response from anything including recovery mode and bootloader mode) ~ Bricked it while trying to flash cwm for rk30 device.
2. device is running a JB 4.1.1 for the android version, and kernel 3.0.36+ ([email protected] #48)
3. I have already started learning adb, well for the most part, i had used it in the past for unlocking devices that got locked out screen patterns, and rooting.
4. The Device has a rk3188 1.6ghz max quad (Box says 1.8 though), mali400mp(Quad), 2GB ddr3 ram, 8gb internal storage, partitioned in 2, nand and internal.
5. I have the usb drivers for adb and rktool, android sdk, currently downloading and installing cygwin but the download is so long, i am forced to close/pause it.
6. I have already rooted the device, and modified the applications, and removed some apps that is not required. I deleted the files in the /system/app thru adb. I also had edited the Build.prop already, Changed the heapsize to the best performance (I am comparing the performance with CPU Identifier and Passmark. ) Stability is tested with simultaenous apps (High end games, browser, root apps, benchmark). I also edited the pixel density and reduced it by 1 to make the resolution exactly 1280 x 800.
7, One bug i found is that it cant play NBA 2k13, I had almost tried every solution i can find in the internet, Used different version, i even copied the data and apk from a device that can play it. The game force closes automatically after the Black screen (Original apk) or muzhiwan or apkmania.com loading screen at the start. This is also one of the reasons why i wanted to edit/modify the device.
What i wanted to do.
-Backup Original Firmware/rom/img (i dont know which and what is the correct term)...
-upgrade jellybean to 4.2 if possible, or 4.3
-Tweak more the device to bring out the full potential of it,
-remove and clean the apps and everything, leaving only the necessary files and apps.
-learn more how much i can modify it.
NOTE: I am not asking for the people in this forum to spoonfeed me, i just wanted to know how and where to start, what to do, some keywords for searching, and the limitations that i have in my venture.
-i am a gambler and will take the risk to learn android much more )
Thank you

First of all, congrats that you are more of a researcher. That's a good thing because in the internet, answers to every questions are available. You just need to do the right search in the right way. :good:
Games not working on a device maybe because of various reasons such as the developer has made it limited to work on certain devices or processor architecture etc. If Play Store link shows not supported, then it needs more research and modifications to make it work, which is like 50-50.
And, as a learner you are good to start with XDA-University. It has countless tutorials in that section.
Good Luck and welcome to XDA!

thank you for the link and reply, i am actually suited best in researching, i learned every bit and pieces i know in building websites, programming web apps and system with php, even overclocking and advanced troubleshooting in researching the internet, anyways i have another question to ask,
what is nandroid?
is it an android device with nand storage? (I.E. Nand - internet - external - usb storage)
thank you again

th3f33 said:
what is nandroid?
is it an android device with nand storage? (I.E. Nand - internet - external - usb storage)
thank you again
Click to expand...
Click to collapse
Nandroid is referred to as Nandroid Backup (Backup being taken of ROMs) in ClockWorkMod recovery (Custom Recovery) for the most part.

coolsandie said:
Nandroid is referred to as Nandroid Backup (Backup being taken of ROMs) in ClockWorkMod recovery (Custom Recovery) for the most part.
Click to expand...
Click to collapse
i see, thank you again, as of now, i am still downloading cygwin packages, do you have an idea how big is the total file size of it?
and another thing, I have used romdump, and got the following..
boot.img (13mb+)
checksum.md5(265b)
config.gz
recovery.img(32mb)
systeminfo.gz(1.76kb)
system.tar(385MB)
how can these files help me and can i use them for backup?

th3f33 said:
i see, thank you again, as of now, i am still downloading cygwin packages, do you have an idea how big is the total file size of it?
and another thing, I have used romdump, and got the following..
boot.img (13mb+)
checksum.md5(265b)
config.gz
recovery.img(32mb)
systeminfo.gz(1.76kb)
system.tar(385MB)
how can these files help me and can i use them for backup?
Click to expand...
Click to collapse
Sorry, no idea about Cygwin.
boot.img is your Kernel, and its needed for modifying the kernel. config.gz is the configuration of your device, and its also used for kernel building. recovery.img is your recovery. system.tar is your system partition which contains all files related to ROM. Yes, you can use these as a backup, as actually you'll get these when you take a nandroid backup in CWM recovery.

coolsandie said:
Sorry, no idea about Cygwin.
boot.img is your Kernel, and its needed for modifying the kernel. config.gz is the configuration of your device, and its also used for kernel building. recovery.img is your recovery. system.tar is your system partition which contains all files related to ROM. Yes, you can use these as a backup, as actually you'll get these when you take a nandroid backup in CWM recovery.
Click to expand...
Click to collapse
basically, the system.img is the one that is mounted on /system right? and it contains all files related to rom, does it mean that the ROM is like the OS? if i am not mistaken, i had already edited the apps and build.prop in the /system before i had made the system.img. But i have pulled the whole /system folder before i deleted the apps thru adb.
now the recovery.img is the one that have the android with red triangle exclamation point on vol+ power (android system recovery 3e, this is stock right) ? this is what i need to use if i fail on flashing a custom recovery? is that right?
how important is the config.gz?
boot.img is the kernel, should i stay away from the kernel for the time being? or is it better to check the boot.img first?
am i lacking any file for backup or is this enough for backup?
i have installed rom manager but it says it unsupported device. does it mean that i cannot install CWM?
i think i can flash custom rom with rkbatchtool, i had tried it before (custom rom for a different type) and it ended up bricking the device

as of now, i have tried flashing the generic cwm for rockchip which ended in a black screen recovery,
i also tried flashing my recovery.img but it doesnt work, it get flash but nothing works
it is still working fine as of now except that it doesnt have a recovery!
i think i had corrupted the recovery partition, cause i used a 1.35 rk flash tool and the memory address was set for rk3066 which is 0x0010000 (i think) and mine was 0x0020000.....