Changing Smart TV Boot Logo

General Forum for talking area for D series TVs.

bibloks
Posts: 15
Joined: Mon Jan 16, 2012 8:34 pm

Re: Changing Smart TV Boot Logo

Post by 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

User avatar
erdem_ua
SamyGO Admin
Posts: 3112
Joined: Thu Oct 01, 2009 6:02 am
Location: Istanbul, Turkey
Contact:

Re: Changing Smart TV Boot Logo

Post by erdem_ua »

I did.

User avatar
nobody
Posts: 182
Joined: Sat Nov 12, 2011 1:45 am

Re: Changing Smart TV Boot Logo

Post by 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.
Last edited by nobody on Tue Jan 24, 2012 6:15 pm, edited 1 time in total.

User avatar
juusso
SamyGO Moderator
Posts: 10124
Joined: Sun Mar 07, 2010 6:20 pm

Re: Changing Smart TV Boot Logo

Post by juusso »

Bootloader doesnt watch mtd_exe, just only authuld :-)
LE40B653T5W,UE40D6750,UE65Q8C
Have questions? Read SamyGO Wiki, Search on forum first!
FFB (v0.8), FFB for CI+ . Get root on: C series, D series, E series, F series, H series. rooting K series, exeDSP/exeTV patches[C/D/E/F/H]

DO NOT EVER INSTALL FIRMWARE UPGRADE

User avatar
nobody
Posts: 182
Joined: Sat Nov 12, 2011 1:45 am

Re: Changing Smart TV Boot Logo

Post by 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
Official SamyGO Developer
Posts: 1700
Joined: Fri Oct 02, 2009 8:52 am
Location: Austria/Vienna (no Kangaroos here)
Contact:

Re: Changing Smart TV Boot Logo

Post by arris69 »

nobody wrote: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 :ugeek:

User avatar
nobody
Posts: 182
Joined: Sat Nov 12, 2011 1:45 am

Re: Changing Smart TV Boot Logo

Post by nobody »

arris69 wrote:
nobody wrote: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 :ugeek:
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

User avatar
juusso
SamyGO Moderator
Posts: 10124
Joined: Sun Mar 07, 2010 6:20 pm

Re: Changing Smart TV Boot Logo

Post by 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.
LE40B653T5W,UE40D6750,UE65Q8C
Have questions? Read SamyGO Wiki, Search on forum first!
FFB (v0.8), FFB for CI+ . Get root on: C series, D series, E series, F series, H series. rooting K series, exeDSP/exeTV patches[C/D/E/F/H]

DO NOT EVER INSTALL FIRMWARE UPGRADE

Post Reply

Return to “[D] General”