Forum RSS Feed Follow @ Twitter Follow On Facebook

Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
[-]
Welcome
You have to register before you can post on our site.

Username:


Password:





[-]
Latest Threads
[QUESTION] Modding an AMI bios to bypass...
Last Post: misty
Today 05:51 PM
» Replies: 10
» Views: 952
[REQUEST] BIOS UNLOCK HP T640 - UMA SIZE...
Last Post: bujok_pl
Today 02:02 PM
» Replies: 0
» Views: 104
[Request] Enabling PCI-E bifurcation on ...
Last Post: ovleg
Today 10:27 AM
» Replies: 0
» Views: 115
[request] Update microcode in HP BIOS fo...
Last Post: j5blue
Today 09:41 AM
» Replies: 92
» Views: 74227
[REQUEST] Dell Inspiron (15) 3521/5521 B...
Last Post: Dellinspiro
Today 05:03 AM
» Replies: 121
» Views: 90874
[REQUEST] HP Pavilion dv3-2024TX whiteli...
Last Post: x200t
Today 01:42 AM
» Replies: 0
» Views: 160
Request. optiplex 5050 bios modd for cpu...
Last Post: DeathBringer
Yesterday 07:33 AM
» Replies: 10
» Views: 925
[request] EP45T-DS3R bios mod microcodes...
Last Post: DeathBringer
Yesterday 02:23 AM
» Replies: 1
» Views: 339
Lenovo T460 - I need a repair of the BIO...
Last Post: mmhendrie
04-25-2025 04:48 PM
» Replies: 11
» Views: 6065
CLEVO BIOS Mods
Last Post: Danmaq
04-25-2025 03:58 PM
» Replies: 240
» Views: 471060
[Request] Acer Aspire V3-771(G) BIOS unl...
Last Post: TempoZZ
04-25-2025 12:48 PM
» Replies: 260
» Views: 134287
[REQUEST] Clevo NH77HP BIOS Unlock
Last Post: sunnymuth
04-25-2025 04:51 AM
» Replies: 6
» Views: 3394
(request) unlock all bios remove whiteli...
Last Post: kslmgd
04-24-2025 06:28 PM
» Replies: 0
» Views: 515
[REQUEST] Lenovo G50-70 (9ACNxxWW) White...
Last Post: Dudu2002
04-24-2025 12:33 PM
» Replies: 241
» Views: 104611
GL40 Chipsatz+Intel Core 2 Extreme X7900
Last Post: Moddo73@PROXIMUS
04-24-2025 09:00 AM
» Replies: 2
» Views: 395
[REQUEST] BIOS UNLOCK ACER Predator PHN1...
Last Post: Dudu2002
04-24-2025 05:18 AM
» Replies: 1
» Views: 472
Request: ThinkCentre M73 (Tiny 10AY) ful...
Last Post: Ragerist
04-24-2025 04:49 AM
» Replies: 0
» Views: 379
[Request] HP 620 whitelist removal
Last Post: Moddo73@PROXIMUS
04-24-2025 01:03 AM
» Replies: 9
» Views: 11778
[REQUEST] Lenovo Thinkpad X240 (GIETxxWW...
Last Post: Dudu2002
04-23-2025 06:11 PM
» Replies: 340
» Views: 163852
Dell Optiplex GX520/620 Incompatible Pro...
Last Post: taggertie86
04-23-2025 03:22 PM
» Replies: 18
» Views: 19634

[Solved] Bios Mod Thinkpad X250 - Disable 0251 CMOS Error
#1
Hello everyone!

I have a Thinkpad X250 with a modded BIOS including advanced BIOS menu and CFG bit unlocked. It is running macOS Monterey and everything works (almost) perfectly, there is a strange problem with Hibernation which I can't figure where it comes from.

The thing is when I put the laptop into Hibernation, it shuts down well and resume perfectly when I turn it on again, but on the next boot it throws me this error "0251: System CMOS Checksum bad - Default configuration used". I've litteraly tried everything on macOS/OpenCore side with HibernationFixup, RTCMemoryFixup, by targetting the RTC offsets which shouldn't be written but it seem that it doesn't changes anything. The problem is not present with Linux/Windows and macOS when I use Standby S3 sleep.

So my new idea is to see if it is possible to mod the BIOS to disable warnings related to this CMOS error, the UEFI module in question is named "DxeCmosInit".

Does anyone has any idea how to do this? The BIOS file is attached to this post. Or alternatively do you think it's possible to just remove the DxeCmosInit module from the BIOS, will it work?

Thanks a lot!
find
quote
#2
An update to say that the problem is SOLVED!

The fix was easy, I just removed the "DxeCmosInit" module from the UEFI Bios with UEFITool, then flashed back the modded Bios (with CH341A programmer), no more CMOS checksum check/error on boot (winning few seconds).

Regards
find
quote


Forum Jump:


Users browsing this thread: 1 Guest(s)