[HOW TO] Fastboot on LGP500

[Bytecode]

You're right But restoring a nandroid backup will not affect appsboothd.mbn right?

It shouldn't,because nandroid only touches system,sd-ext,data and some other things.

For example,if you restore a Nandroid backup of a Stock V10C rom things like appsboothd.mbn and amss.mbn aren't touched. I discovered this by actually restoring a V10c nandroid(I had the stock V10A when restoring) and i figured out that amss.mbn wasn't touched. Discovered this in com.lge.hiddenmenu,my baseband was still V10A.

 

[Bytecode]

Well, we now have appsboot and appsboothd fastboot enabled from the leaked test LG Gingerbread build. All we have to do is to unpack a Froyo rom and to replace this files. I have did it and also replaced the recovery with CWM. In this way we don't need to worry about rooting since we can restore backups through recovery. I will add it later if someone wants it.

Edit1: I am already uploading it. I hope that in one hour will be up.
Do a backup first. It doesn't matter in which recovery since you can use anything to switch back afterwards.
Just unzip it into a folder.
You will have to use LGMDP from here.

Edit2: So here it is. This is based on a branded Vodafone RO 2.2. I only replaced appsboot.mbn, appsboothd.mbn and recovery.img (CWM 3.1.0.0). If it bootloops on the last reboot (you'll know which is it) just remove the batery and put it back in (without the usb cable connected ofc) and start it to enter recovery (to restore your backup or flash amonra).

So Mario,how we gonna start fastboot mode.

 

[mik_os]

Well, we now have appsboot and appsboothd fastboot enabled from the leaked test LG Gingerbread build. All we have to do is to unpack a Froyo rom and to replace this files. I have did it and also replaced the recovery with CWM. In this way we don't need to worry about rooting since we can restore backups through recovery. I will add it later if someone wants it.

Edit1: I am already uploading it. I hope that in one hour will be up.
Do a backup first. It doesn't matter in which recovery since you can use anything to switch back afterwards.
Just unzip it into a folder.
You will have to use LGMDP from here.

Edit2: So here it is. This is based on a branded Vodafone RO 2.2. I only replaced appsboot.mbn, appsboothd.mbn and recovery.img (CWM 3.1.0.0). If it bootloops on the last reboot (you'll know which is it) just remove the batery and put it back in (without the usb cable connected ofc) and start it to enter recovery (to restore your backup or flash amonra).

Confirming this.

@all
And with LGMDP you can flash only next:
- Partition table
- APPSBL Image Header
- APPSBL Image
to get bootloader with fastboot and save all your data.

 

[marioemp2k7]

Well, I couldn't flash only those 3 partitions. The Start button would deactivate if I uncheck boot Image and system.

To enter fastboot keep pressed the Home button while you are powering on the phone. Don't release them until you are in fastboot mode.

 

[mik_os]

Well, I couldn't flash only those 3 partitions. The Start button would deactivate if I uncheck boot Image and system.

Just close window and press Download.

To enter fastboot keep pressed the Home button while you are powering on the phone. Don't release them until you are in fastboot mode.

Or "adb reboot-bootloader", or "reboot bootloader" in terminal/adb shell on a device.

WARNING: sometimes device does not recognizing in fastboot mode, just reboot it.

 

[marioemp2k7]

You are right! I just tested.
@everybody: Just do what Mik sugested (select only 3 images to download, close the window and the click Download button).

 

[Bytecode]

You are right! I just tested.
@everybody: Just do what Mik sugested (select only 3 images to download, close the window and the click Download button).

Anybody tried this on Win7? Can somebody post the pre-requisites for this? Don't wanna mess up my phone.

 

[mik_os]

Anybody tried this on Win7? Can somebody post the pre-requisites for this? Don't wanna mess up my phone.

Me on win7 x64. No problems at all

 

[Bytecode]

Me on win7 x64. No problems at all

I'll use Win7 32-Bit

 

[yasingedik]

Thanks for all the efforts,

Just asking for clearance, now we can enable fastboot for p500, right?
It would be nice to unlock security someday, like alpharev done for HTC devices. Enabling read write for system folder while device is running can be useful, right?

Sorry, if I miss something, and understand the whole thing wrong

 

[marioemp2k7]

What do you mean? We are not restricted in any way. We have write access to the system folder. Fastboot is merely a courtesy for developers.
Now, they can test their kernels easier. As for the normal users it's not such a big deal since we have custom recoveries that tend to most of the needs (rom flashing, backup, restore, wipe, etc.).

 

[yasingedik]

I mean mounting system folder not only in recovery but also while os is running. If we are able to do that right know, I should have missed that.
And for fastboot: afaik, It comes handy for unbricking, problem solving, flashing boot splash , flashing recovery, system from terminal.

 

[d3s3rt_eagle]

I mean mounting system folder not only in recovery but also while os is running. If we are able to do that right know, I should have missed that.
And for fastboot: afaik, It comes handy for unbricking, problem solving, flashing boot splash , flashing recovery, system from terminal.

Yes, you can mount system in rw also when android is running

 

[marioemp2k7]

But this was possible from the moment we got root by:
"mount -o remount,rw -t yaffs2 /dev/block/mtdblock1 /system" since the bootloader is not locked like in most of Htc's.

 

[yasingedik]

doh!
thanks

 

[rotorto]

I flashed only partition, appsboot and appsboohd as suggested by mik_os. It works.

 

[marioemp2k7]

Please be aware that there are cases when Fastboot doesn't start properly. In those cases, you'll have to remove the battery and reinsert it.

 

[ViTAMiNCHEG]

How to get fastboot working on my device? Any instructions/advice?

 

[Icemaine]

would this be useful in any way for "easily" switching base band to switch between froyo and gingerbread? Forgive me if this is a stupid question.

Seem to recall using the boot loader to flash all sorts of things like the radio on a htc kaiser.

 

[marioemp2k7]

FastBoot Tutorial

1. Please download this (or from here) file and unzip it in to any folder.

2. Start LGMDP 1.5 tool with the phone connected (you need to have USB drivers installed) and click on Select Port

3. A separate window should appear like the one below

Just click connect

4. Another window will take shape (LGE Mobile security) with lots of options (links)

Click on the first upper right Browse and select the folder in with you have unzipped the files. You will get some errors that some image, table or headers are missing. Just click OK and in the end everything that should remain selected is Partition Table, APPSBL Image Header and APPSBL Image.
Now just close the window (click on x)

5. Now you are back on the main window and here you'll have to click on Download

6. You are almost done and from now on everything should go on automatically.

NV Backup

Autorestart in Emergency\Download mode and upgrade the files (you selected on step 4)

NV Restore (the last step) Do not disconnect the USB cable until the restore is done

Wait for the phone to restart in normal mode (your current rom).
That should be everything you need to do to get fastboot enabled.