Changing Smart TV Boot Logo

[bibloks]

HI m8, still did not have chance to paly with my TV but I am familiarized with linux. I do not think by no means that if you change boot logo that can brick your TV (somebody can correct me if I am wrong), just take care and see what is the size of the /bmp and do your logo with the same size, that would be easy with linux machine using Gimp

good luck, perhaps we can start making fancy bootlogos so user may use it for fun

bibloks

[erdem_ua]

I did.

[nobody]

WARNING: the answer is YES: you will brick your TV.

That's because mtd_exe is checked for signature by both the bootloader both authld.
So the only way to modify MTD_EXE is to know how to calculate a new signature or by disapling signature checks in both the bootloader both authld.

[juusso]

Bootloader doesnt watch mtd_exe, just only authuld

[nobody]

Oops, sorry you are right.. onboot checks only the kernel.

So, I don't understand what's the problem in building a custom firmware.
The only needed thing is to patch authuld to give the right response, right?

[arris69]

Oops, sorry you are right.. onboot checks only the kernel.

So, I don't understand what's the problem in building a custom firmware.
The only needed thing is to patch authuld to give the right response, right?

the only problem is -> what do you like to put into the custom firmware if we have no linux driver for the chips
only app that can work with the hardware over nonlinux (samdrv.ko) interface is exeDSP and this is flashed already

[nobody]

Oops, sorry you are right.. onboot checks only the kernel.

So, I don't understand what's the problem in building a custom firmware.
The only needed thing is to patch authuld to give the right response, right?

the only problem is -> what do you like to put into the custom firmware if we have no linux driver for the chips
only app that can work with the hardware over nonlinux (samdrv.ko) interface is exeDSP and this is flashed already

well.. many things, for example a startup script (a script that starts immediately and not after a minute)
a modified exeDSP with some tweaks.
mdified scripts to allow a selective firmware upgrade..

and so on..
as far as I can see, 2 NOPs and an unconditional branch is all that is needed to bypass authuld

[juusso]

What about to remove authuld from rootfs at all? Just kick this f*****g binary out.
Then no patch is needed at all. The question is - what to feed for kernel

Sorry, we gona out of topic here. The topic is Changing Smart TV Boot Logo.