ThinkPad T580 WWAN Whitelist BIOS Unlock

[Dmitry Moskvenkov]

Hi, there!
Guys, i need some help with removing vendor's whitelist - wanna install snapdragon wwan module on my ThinkPad T580.
Could anyone help me with?

[peste]

Hi, there!
Guys, i need some help with removing vendor's whitelist - wanna install snapdragon wwan module on my ThinkPad T580.
Could anyone help me with?

post S/N, full name and model, motherboard model, TYPE,post the original contents of the bios chip..etc.

[Dmitry Moskvenkov]

post S/N, full name and model, motherboard model, TYPE,post the original contents of the bios chip..etc.

Okay

ThinkPad T580
S/N R90VJMS8
Type: 20LA
Mainboard: SDK0J40697 WIN (S\N W2KS96H11FG)
SKU: LENOVO_MT_20LA_BU_Think_FM_ThinkPad T580
dump (without any passwords) made by ch341

[Maxpower3]

I don't understand your bios.
We should find LenovoWmaPolicyDxe there as in the T580 bios above.
Guid 79E0EDD7-9D1D-4F41-AE1A-F896169E5216 but it tells me NON-UEFI Data.
Are you sure about reading the bios ?

[Dmitry Moskvenkov]

Hmm, i've got this dump by CH341B programmer tool. Maybe it wasn't done properly.
Let's try another dump - i did it via Universal BIOS Backup ToolKit 2.0 under windows

[Maxpower3]

Hmm, i've got this dump by CH341B programmer tool. Maybe it wasn't done properly.
Let's try another dump - i did it via Universal BIOS Backup ToolKit 2.0 under windows

yes it's better

[Maxpower3]

from this patch?
https://github.com/digmorepaka/think...rmware-patches

we manage to find the first 2 conditional jumps.
the addresses are different but the jumps are identical.



the problem is the 3rd modification. because the jump is different.
if we look at the jump on a T480, we arrive there


you must therefore find the location on the T580.
what gives here

several jumps are added between and it also contains a jnz (75) instead of a jz (74).


it would therefore be necessary to do a jmp+4 to arrive at the same place
so the solution would be to do
ECA8047549:ECA804EB51 instead ECA8047404:ECA804EB04

I made a file if you want to test it

Difference between T480/580 or LenovoWmaPolicyDxe version?
I don't know

[Dmitry Moskvenkov]

from this patch?
https://github.com/digmorepaka/think...rmware-patches

I made a file if you want to test it

Hello, thank's, will try

[Maxpower3]

Hello, thank's, will try

I succeeded on mine, however it will not work with the file provided.
You have to do otherwise.

Reread the bios with the programmer
(look at the comments on ch341 here on the forum. desolder the chip and do not use a clip)

Tried with cards that are not compatible.
Now no more error 1802



WWAN tested with this card
she is special (sick) supposed to be compatible but still error 1802.
Tested on dozens of PCs, always in error.
There is no better test than this


Wlan tested ok with Dell card

[Maxpower3]

Hmm, i've got this dump by CH341B programmer tool. Maybe it wasn't done properly.
Let's try another dump - i did it via Universal BIOS Backup ToolKit 2.0 under windows

you cannot use Universal BIOS Backup ToolKit 2.0
because the start of the file is not present



edit :moderator please move the post to another whitelist thread
Bios request here, I think it's not in that place, and I really messed up the thread

[SMDFlea]

edit :moderator please move the post to another whitelist thread
Bios request here, I think it's not in that place, and I really messed up the thread

Moved to a new thread as per your request.