Possible downgrade?

[bibloks]

Well...ronaldo made me stop for a while with his goal between the legs of barcelona's goalkeeper

Now about firmware, I have found a bord that reports of havingf firmware 0000 and there are many confirmation that it actuallyt work, after installing this 0000 one is allowed to put any upper version. I am not allowed to post the link.
This firware is called 0000 it is supposed to turn C series to 0000 and then upload any upper version.

Can experts check this and is it possible for this to work on D6900 ?

bibloks

[juusso]

The zero firmware (0000) is only for C series T-VALDEUC. You can`t use it for another models/platforms. Only C series Valencia.

[ocean]

Is it maybe possible to change one of the files of an older firmware version to pretend to the actual firm on Tv that this one is newer?
Has anybody already tried it that way? I'm new to this but I also got the problem of a "samygo unfriendly" firm, as you can see in signatur.

greetings ocean

[arris69]

Is it maybe possible to change one of the files of an older firmware version to pretend to the actual firm on Tv that this one is newer?
Has anybody already tried it that way? I'm new to this but I also got the problem of a "samygo unfriendly" firm, as you can see in signatur.

greetings ocean

looks like in latest firmwares is also doublechecked with versions information is in exeDSP (not just from Version.x file in mtd_rwarea) and the version files also pseudo crypted/signed.

downgrade is not possible, as you can read in some other posts too.

hth
arris

[milestone]

I have an idea for downgrading but i dont know if it is possible anyway.

My Idea:
- A volunteer updates from an old SamyGo friendly firmware to the current firmware via online update. => The user will have the possibility to switch firmware in options afterwards (this is only possible making an online update)
- The tv of the volunteer is rooted and monitors file system changes with "kfsmd" or something similar.

Afterwards we would know which files are placed to allow switching firmwares in tv options. We can copy the neccessary files at least from the tv of the volunteer.

Now the problem: Do you think, we can copy the files to another tv with a up to date firmware? Probably we would neet root access (currently not possible), right?

But if we would have a way to root a current firmware in future it would also be possible to downgrade to a firmware that is working with samyGo...

[bibloks]

I have rooted my TV with 1019.0 firmware, following the instruction in wiki. I have MIPS not ARM

[juusso]

@milestone: we cant access/copy any file to non rooted TV, which could help to downgrade.
We cant flash manually without having root access.