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[INFO] XXJVK with or with-out bootloaders [Find the answer here]

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By [Ramad], Senior Member on 28th March 2011, 12:39 PM
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Before you read any further:

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This thread will not discuss fixing Download Mode on effected mobile phones.
This thread will not discuss any method on flashing bootloaders only.
This thread will not discuss anything beside bootloaders of XXJVK and why they are needed in some cases.

Please keep the thread clean and stay on topic, thanks


Why did I write this:
I have been across many threads, including the XXJVK firmware thread, and I did read many posts by members asking on which firmware to flash, if it should be the one with bootloaders included or the one without.

I did also find a post telling our members to flash the bootloaders only and not the whole firmware.

I would like to clear some things up for our members and why there is 2 versions, one with bootloaders and one without bootloaders.

Why 2 versions:
If you flash the firmware without bootloaders when your device have been running only Froyo and have not flashed the Gingerbread beta XWJV1 before, then your device is still using the old bootloaders and you will notice the followings:

* Graphics corruption during boot.
* The device will not be able to enter Recovery Mode.

Just to make it easy to understand, please look below:
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XXJVK firmware with-out bootloaders + Froyo/Eclair bootloaders on device = Graphics/Screen corruption + Can't enter Recovery Mode

XXJVK firmware with-out bootloaders + XWJV1(GB Beta) bootloaders on device = OK!

XWJV1(GB Beta) firmware with-out bootloaders + XXJVK bootloaders on device = OK!

Froyo firmware with-out bootloaders + XXJVK or XWJV1(GB Beta) bootloaders on device = OK!

After the device has been updated to the new bootloaders by flashing the firmware with bootloaders, then it will work with any firmware, and you don't have to flash the firmware with bootloaders again, this is why there is 2 versions, because bootloaders flash can be risky, the package that does not include bootloaders is for those that have already flashed a full XWJV1 or a full XXJVK with bootloaders included, may need/like to re-flash, or for those that only want to try the new firmware.

Why not flashing bootloaders alone:
Flashing bootloaders is risky, this is why when the XXJVK with bootloaders has been repackaged then it was repackaged so 2 files will be flashed prior to bootloaders, so if there is a bad connection between the PC and the phone or with Odin by any chance, then Odin is far from touching boot sectors, and by that a member can have a good flash even while flashing a full firmware with bootloaders included.

I don't advice to flash bootloaders only, if there is a bad connection or Odin hangs by any chance, then you have nothing but a paper-weight nice-looking-dead-device on your desk.

My question is: Do you see any thread or a post in this forum that stats a bricked or a dead device after 16000+ downloads and then take the risk of flashing bootloaders only?
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Note:

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This thread is not intended for showing or discussing methods on how to flash bootloaders only, but about informing the members of the new bootloaders and what firmware XXJVK version to choose and why.

If you plan to discuss other methods on flashing bootloaders then make your own thread where you can take responsibility for it.

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28th March 2011, 01:01 PM |#2  
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@Ramad, thanks for this information. Do we know for certain whether Samsung have 'locked' these new bootloaders like they did with the Galaxy Tab ones or can you flash back to a 2.2.1 Rom with no problems after flashing the Gingerbread bootloaders?
28th March 2011, 01:07 PM |#3  
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Quote:
Originally Posted by bdl1969

@Ramad, thanks for this information. Do we know for certain whether Samsung have 'locked' these new bootloaders like they did with the Galaxy Tab ones or can you flash back to a 2.2.1 Rom with no problems after flashing the Gingerbread bootloaders?

Thanks

The bootloaders are not locked and will not prevent the device from flashing or using older releases(Froyo/Eclair), I have tested the new bootloaders with both Froyo and Eclair and they worked fine.
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28th March 2011, 01:10 PM |#4  
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<Don't try it if you don't really know what that implies !>

I've only Flashed Sbl.bin (after add it in a tar on Linux machine, don't make it with another tool !) fixes graphics corruption and recovery and downgrade to 2.2.1 works like before.

</Don't try it if you don't really know what that implies !>
28th March 2011, 01:29 PM |#5  
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I must confess a noobish doubt, how can I see if I have bootloaders ?
I'm using a custom rom JS8 Froyo
So I can determine wich version should I use
28th March 2011, 01:33 PM |#6  
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Quote:
Originally Posted by Pisca

I must confess a noobish doubt, how can I see if I have bootloaders ?
I'm using a custom rom JS8 Froyo
So I can determine wich version should I use

Every device has bootloaders, but if you are asking if it's the old or new bootloaders that are installed in your, then you have old bootloaders if you have not flashed the beta XWJV1 or XXJVK package that has bootloaders included, those 2 firmwares has the new bootloaders.
28th March 2011, 01:38 PM |#7  
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Thank you once again ramad

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28th March 2011, 02:25 PM |#8  
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Quote:
Originally Posted by .Slane.

<Don't try it if you don't really know what that implies !>

I've only Flashed Sbl.bin (after add it in a tar on Linux machine, don't make it with another tool !) fixes graphics corruption and recovery and downgrade to 2.2.1 works like before.

</Don't try it if you don't really know what that implies !>

What would be the advantage over flashing both boot loaders? Because that also will not interfere with froyo...

Sent from my galaxy using the xda app
28th March 2011, 02:30 PM |#9  
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Quote:
Originally Posted by kasper_h

What would be the advantage over flashing both boot loaders? Because that also will not interfere with froyo...

Sent from my galaxy using the xda app

very good...the bootloaders are very important
28th March 2011, 02:34 PM |#10  
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I did'n upgrade bootloader when i flash 2.3.3(from samfirmware) using odin and i have no any isues with my phone.i can entry to recovery and.download mode.
So why some people have a proplem and some not at all?

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28th March 2011, 02:43 PM |#11  
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Quote:
Originally Posted by bizkopt

I did'n upgrade bootloader when i flash 2.3.3(from samfirmware) using odin and i have no any isues with my phone.i can entry to recovery and.download mode.
So why some people have a proplem and some not at all?

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Have you flashed the Beta XWJV1 before? Please read the first post before posting.
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