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fastboot on our L9 with omap4boot

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By sguerrini97, Senior Member on 26th January 2013, 04:45 PM
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First of all, the thread about omap4boot: http://forum.xda-developers.com/show....php?t=1971014
I didn't create this tool, I just found out a way to make it works with our phone, and maybe I'm not the first (tested under Windows 7 Ultimate 32-bit).

What do you need:
  • omap4boot, get it from original thread.
  1. Extract omap4boot archive somewhere like C:\omap4boot (I will use this path in the tutorial).
  2. Power off your phone and remove the battery.
  3. Connect your phone (still without the battery) to the PC.
  4. You will hear the sound of a new driver, then the sound of a driver when it disconnects continiusly.
  5. Start -> Right click on "Computer" -> "Manage".
  6. On the left column, click on "Device manager".
  7. You will see a device that appear and disappear under "Other/Unknown Devices".
  8. You must right click on the unknown device before it disappear, once clicked select "Driver Update". (You can use this tip to make the process easier http://forum.xda-developers.com/show...php?p=51019004).
  9. Click on the second button (manually install driver) and insert the "usb_drv_windows" path (C:\omap4boot\usb_drv_windows) and install the driver.
  10. Disconnect the phone from the PC and power it off.
  11. Open a command prompt (Win+R, type cmd and press Enter).
  12. Type the following command in the command prompt:
    Code:
    cd C:\omap4boot
    start-fastboot.bat
  13. Now input 3 (Prada 3.0 P940) and press enter.
  14. Plug the phone without battery to the PC, when the tool says "Wait 5 seconds" put the battery in your phone.
    (The first time that you do this, you have to install the drivers again. Repeat step 9)
  15. At the other prompts answer always "N", this could be important.

Now you can use fastboot on L9 Next times you can start from step 12.

(the red rettangle isn't important here )

Sorry for my english, if someone wants to review the tutorial just send me a PM.
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26th January 2013, 05:06 PM |#2  
artas182x's Avatar
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I test it when I do recovery.img (we need to sign it, I will try with prada keys).
Has anyone tried to flash something?
Do you think it won't brick our phone. It flashes new u-boot.
On W8 x64 when I install driver I get Not signed INF.
What FW have you got? 10g or other?
27th January 2013, 07:26 AM |#3  
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Quote:
Originally Posted by artas182x

I test it when I do recovery.img (we need to sign it, I will try with prada keys).
Has anyone tried to flash something?
Do you think it won't brick our phone. It flashes new u-boot.
On W8 x64 when I install driver I get Not signed INF.
What FW have you got? 10g or other?

I flashed some stock partitions (recovery, boot) on ITALIAN WIND 10D but I can't confirm if the security error appear or not now.
When i tried to flash system.img fastboot said something like "file too large".
At the step 15 I said to answer N, otherwise the tool should flash new u-boot and I'm not sure if it works on our L9.
Maybe on a 64-bit system you have to disable the driver signature check, the bad thing is that (on Windows 7) you have to do it manually at every boot.
27th January 2013, 08:38 AM |#4  
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Odp: fastboot on our L9 with omap4boot
I try this today. Maybe it's a way to soft unbrick our l9 (without kdz).

Wysyłane z mojego LG-P760 za pomocą Tapatalk 2
27th January 2013, 09:03 AM |#5  
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Quote:
Originally Posted by artas182x

I try this today. Maybe it's a way to soft unbrick our l9 (without kdz).

Wysyłane z mojego LG-P760 za pomocą Tapatalk 2

Yes this should make the phone unbrickable (i think a backup is needed), but as I said I got problems flashing the system.img.
Also, if we get a security error flashing a custom recovery/boot.img we can restore the original recovery/boot.img in seconds without LG Support Tool.
27th January 2013, 02:21 PM |#6  
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R: fastboot on our L9 with omap4boot
Se need to try u boot from Prada..maybe work!

Inviato dal mio LG-P760 con Tapatalk 2
27th January 2013, 02:39 PM |#7  
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Bootloader is LK MAY-2012 in Prada 3.0 and our L9. It can work.
27th January 2013, 02:56 PM |#8  
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Quote:
Originally Posted by artas182x

Bootloader is LK MAY-2012 in Prada 3.0 and our L9. It can work.

I can try but how to restore the stock u-boot if things won't going well?
27th January 2013, 03:11 PM |#9  
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I think we can restore with kdz, but I'm not sure.
27th January 2013, 03:16 PM |#10  
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Quote:
Originally Posted by artas182x

I think we can restore with kdz, but I'm not sure.

Looking in the omap4boot's files seems that it dumps "x" and "u" partitions (when it dumps the locked loader).
I will backup those partitions to have a possibility of restore with fastboot.

Should I follow the procedure for Prada P940?
27th January 2013, 03:18 PM |#11  
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i think as same as you,if you can get into recovery, in theory you could install kdz rom.
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