Upgrade/Downgrade Kernels

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prasannavl

Senior Member
Mar 29, 2011
64
62
People who are stuck with 4.5.1-134_DFP-13XX Kernels and or any BL6 SBFs may now freely switch between any kernels they require.

Say for example, to upgrade to Walter's fixed SBF of 4.5.3_109 Kernel from 4.5.1-134_DFP-13XX, do the following.

1. Flash Defy-BL6Downgrade-CDT.sbf through RSD Lite.
2. Flash walter's 4.5.3_109 kernel sbf right away after that or an update zip package if you have a functional recovery. (Actually, you may flash any kernel. Even Froyo kernels)

You're done.

Wipe data/cache in case you get stuck at boot. No more bootloader errors.

This is based on http://xdaforums.com/showthread.php?t=1486731

Credits go to dlhxr.

Note: If you have an SBF which you want to flash after this, just the BL6Downgrade-CDT.sbf is enough.

If you want to get into a custom recovery (only if you already have it), then you have to flash BL6Downgrade.SBF, or you will end up with a Bootloader ERR screen.

Files:
BL6Downgrade.SBF [34MB] - http://www.mediafire.com/download.php?vdpp0nnr5f12e95
 

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dFde

New member
Feb 12, 2010
1
0
Hey guys,

I tried the steps mentioned above.
I had the 4.5.1-134-DFP-231 on my Defy+ and wasn't able to root it.

So I downloaded the Defy-BL6Downgrade.sbf and the 4.5.2-109-DHT-22-fixed.sbf and flashed them in this order with RSD Lite 4.9

Now my screen stays completely black. But it seems to enter the boot loader as RSD Lite shows the device as "connected..."

When I flash again, the screen turns on and shows "SW Update In progress".
But still no screen...

Any help on that?
 
S

sferrariba

Senior Member
Feb 5, 2011
178
18
Already posted
http://xdaforums.com/showthread.php... froyo kernel and green lense camera with bl6

Sent from my MB525 using xda premium
 
Chamelleon

Chamelleon

Senior Member
May 16, 2010
779
366
Kraków, Poland
LG G6
LG G7 ThinQ
dFde said:
Hey guys,

I tried the steps mentioned above.
I had the 4.5.1-134-DFP-231 on my Defy+ and wasn't able to root it.

So I downloaded the Defy-BL6Downgrade.sbf and the 4.5.2-109-DHT-22-fixed.sbf and flashed them in this order with RSD Lite 4.9

Now my screen stays completely black. But it seems to enter the boot loader as RSD Lite shows the device as "connected..."

When I flash again, the screen turns on and shows "SW Update In progress".
But still no screen...

Any help on that?
Click to expand...
Click to collapse

For now only what you can do is reflash it with DFP-231 to make it working and waiting for root like everyone with BL7.

Defy Plus 4.5.1-134 DFP-231 CEE
 
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fiskenigaten

fiskenigaten

Senior Member
Jan 3, 2012
305
138
So we could say this is the ultimate setup for those with Obsessive-ROM Updating Disorder? So we can move freely between froyo and gb without flashing full sbf every time? :D
 
Epsylon3

Epsylon3

Senior Member
Jan 25, 2008
1,177
4,310
Geneva
tanguy.forumdoandroid.com
prasannavl said:
People who are stuck with 4.5.1-134_DFP-13XX Kernels and or any BL6 SBFs may now freely switch between any kernels they require.

Say for example, to upgrade to Walter's fixed SBF of 4.5.3_109 Kernel from 4.5.1-134_DFP-13XX, do the following.

1. Flash Defy-BL6Downgrade.sbf through RSD Lite.
2. Flash walter's 4.5.3_109 kernel sbf right away after that or an update zip package if you have a functional recovery. (Actually, you may flash any kernel. Even Froyo kernels)

You're done.

Wipe data/cache in case you get stuck at boot. No more bootloader errors.

PS: Can someone please test this with BL7 although it is quite unlikely?

This is based on http://xdaforums.com/showthread.php?t=1486731

Credits go to dlhxr.

Files:
Defy-BL6Downgrade.sbf [34MB] - http://www.mediafire.com/download.php?vdpp0nnr5f12e95
Click to expand...
Click to collapse

Really ? Froyo kernel on a BL6 ?
 
P

prasannavl

Senior Member
Mar 29, 2011
64
62
Updated: Only flashing the CDT is enough to switch to another ROM. But that works only if you can flash another SBF, as the Bootloader with ERR would be shown right after.

In case you're planning to flash through recovery flash the one with the entire kernel. The BL6Downgrade.sbf [34MB] file. Or if you have an sbf of the next kernel you want to flash, then flashing just the BL6Downgrade-CDT is enough.

Epsylon3 said:
Really ? Froyo kernel on a BL6 ?
Click to expand...
Click to collapse

Turns out this is actually a Froyo Kernel resigned for BL6. So, its possible to flash any BL>=4.

Eramix3 said:
I can go to Froyo with flash this downgrade fix?
Click to expand...
Click to collapse

Yes, you can. As long as its any BL>=4
 
premaca

premaca

Inactive Recognized Developer
Jan 22, 2012
1,029
3,623
Bangalore
Is there battery friendly froyo kernel similar to Walter GB kernel 4.5.2-109dht22 which can be used with cm7 on froyo builds.

Sent from my MB526 using XDA App
 
E

Eramix3

Senior Member
Apr 13, 2011
84
10
Brasília
JDGC_U6_2.13.0 > BL6Downgrade-CDT > JORLA_U3_3.4.2_107-9 = Bootloader Error

JDGC_U6_2.13.0 > BL6Downgrade > JORLA_U3_3.4.2_107-9 = Bootloader Error

JDGC_U6_2.13.0 > BL6Downgrade-CDT > JRDNEM_U3_3.4.2_177-005_NORDIC = Bootloader Error

JDGC_U6_2.13.0 > BL6Downgrade > JRDNEM_U3_3.4.2_177-005_NORDIC = Bootloader Error

DEFYPLUS_U3_4.5.1-134 > BL6Downgrade-CDT > JORLA_U3_3.4.2_107-9 = Bootloader Error

DEFYPLUS_U3_4.5.1-134 > BL6Downgrade > JORLA_U3_3.4.2_107-9 = Bootloader Error

DEFYPLUS_U3_4.5.1-134 > BL6Downgrade-CDT > JRDNEM_U3_3.4.2_177-005_NORDIC = Bootloader Error

DEFYPLUS_U3_4.5.1-134 > BL6Downgrade > JRDNEM_U3_3.4.2_177-005_NORDIC = Bootloader Error
 
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    prasannavl
    People who are stuck with 4.5.1-134_DFP-13XX Kernels and or any BL6 SBFs may now freely switch between any kernels they require.

    Say for example, to upgrade to Walter's fixed SBF of 4.5.3_109 Kernel from 4.5.1-134_DFP-13XX, do the following.

    1. Flash Defy-BL6Downgrade-CDT.sbf through RSD Lite.
    2. Flash walter's 4.5.3_109 kernel sbf right away after that or an update zip package if you have a functional recovery. (Actually, you may flash any kernel. Even Froyo kernels)

    You're done.

    Wipe data/cache in case you get stuck at boot. No more bootloader errors.

    This is based on http://xdaforums.com/showthread.php?t=1486731

    Credits go to dlhxr.

    Note: If you have an SBF which you want to flash after this, just the BL6Downgrade-CDT.sbf is enough.

    If you want to get into a custom recovery (only if you already have it), then you have to flash BL6Downgrade.SBF, or you will end up with a Bootloader ERR screen.

    Files:
    BL6Downgrade.SBF [34MB] - http://www.mediafire.com/download.php?vdpp0nnr5f12e95
    View
    1
    Chamelleon
    Chamelleon
    dFde said:
    Hey guys,

    I tried the steps mentioned above.
    I had the 4.5.1-134-DFP-231 on my Defy+ and wasn't able to root it.

    So I downloaded the Defy-BL6Downgrade.sbf and the 4.5.2-109-DHT-22-fixed.sbf and flashed them in this order with RSD Lite 4.9

    Now my screen stays completely black. But it seems to enter the boot loader as RSD Lite shows the device as "connected..."

    When I flash again, the screen turns on and shows "SW Update In progress".
    But still no screen...

    Any help on that?
    Click to expand...
    Click to collapse

    For now only what you can do is reflash it with DFP-231 to make it working and waiting for root like everyone with BL7.

    Defy Plus 4.5.1-134 DFP-231 CEE
    View
    1
    P
    prasannavl
    fiskenigaten said:
    So we could say this is the ultimate setup for those with Obsessive-ROM Updating Disorder? So we can move freely between froyo and gb without flashing full sbf every time? :D
    Click to expand...
    Click to collapse

    Not above BL7 though. Not yet.
    View

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