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[REQUEST] Lenovo Z51-70 (C2CNxxWW) BIOS Unlock
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Posts: 13
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Joined: Jul 2015
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07-15-2015, 11:28 PM
(This post was last modified: 07-16-2015, 12:04 AM by thePsguy.)
Hola Amigos!
I am in the process of getting Mac OSx Yosemite Set up on my Lenovo Z51 Laptop, and am facing an issue with the DMVT Prealloc Memory
in the UEFI BIOS.
I Followed some guides for older laptops and found that I need to set the setup variable 0x18c to 0x3, but unfortunately, this is not possible since the H2O Bios Versions available for my laptop.
My BIOS Dump : https://www.sendspace.com/file/9pg2vz (Universal BIOS Backup toolkit could not identify my bios, so i used its custom option 8192K, is it the correct way to extract?)
EDIT: HERE is the rar from the BACKUP tools, https://www.sendspace.com/file/a1yrrg
Below are the Snaps of my present bios:
![[Image: 2n1b4f5.jpg]](http://i57.tinypic.com/2n1b4f5.jpg)
![[Image: 9tpa49.jpg]](http://i60.tinypic.com/9tpa49.jpg)
![[Image: aya9lv.jpg]](http://i60.tinypic.com/aya9lv.jpg)
I need help in either changing the 0x18c setup variable to 0x3, or i've read in some places, to unlock the hidden menu to be able to do
such things.
Any and all help is needed and very much appreciated!
THANK YOU! 
With hopes sky high,
thePsguy.
Posts: 10,275
Threads: 3
Joined: Oct 2011
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540
Use this tool run It as Admin and upload here the result fle :
http://rghost.net/7GBZt7FVt
let me know
Regards
[size=undefined]Your Brain [/size]. . . . It's the best tool U can use ! 
[size=undefined]Don't FLASH the Bios Mod if You get a Size Alert, You risk a Brick !!! [/size]
Donate to me for my work, click here BDM
Posts: 10,275
Threads: 3
Joined: Oct 2011
Reputation:
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Into your Bios such variable is Video Memory :
0x5512C Setting: IGD - DVMT Pre-Allocated, Variable: 0x18C {05 91 3B 02 3C 02 00 0A 34 12 8C 01 04 10 00 3F 00}
0x5513D Option: 0 MB, Value: 0x0 {09 07 68 01 00 00 00}
0x55144 Option: 32 MB, Value: 0x1 (default) {09 07 6D 01 10 00 01}
0x5514B Option: 64 MB, Value: 0x2 {09 07 6E 01 00 00 02}
0x55152 Option: 96 MB, Value: 0x3 {09 07 71 01 00 00 03}
0x55159 Option: 128 MB, Value: 0x4 {09 07 6F 01 00 00 04}
0x55160 Option: 160 MB, Value: 0x5 {09 07 72 01 00 00 05}
0x55167 Option: 192 MB, Value: 0x6 {09 07 75 01 00 00 06}
0x5516E Option: 224 MB, Value: 0x7 {09 07 73 01 00 00 07}
0x55175 Option: 256 MB, Value: 0x8 {09 07 70 01 00 00 08}
0x5517C Option: 288 MB, Value: 0x9 {09 07 76 01 00 00 09}
0x55183 Option: 320 MB, Value: 0xA {09 07 77 01 00 00 0A}
0x5518A Option: 352 MB, Value: 0xB {09 07 74 01 00 00 0B}
0x55191 Option: 384 MB, Value: 0xC {09 07 78 01 00 00 0C}
0x55198 Option: 416 MB, Value: 0xD {09 07 79 01 00 00 0D}
0x5519F Option: 448 MB, Value: 0xE {09 07 7A 01 00 00 0E}
0x551A6 Option: 480 MB, Value: 0xF {09 07 7B 01 00 00 0F}
0x551AD Option: 512 MB, Value: 0x10 {09 07 7C 01 00 00 10}
0x551B4 Option: 1024 MB, Value: 0x20 {09 07 7D 01 00 00 20}
0x551BB Option: 1536 MB, Value: 0x30 {09 07 7E 01 00 00 30}
0x551C2 Option: 2016 MB, Value: 0x3F {09 07 7F 01 00 00 3F}
0x551C9 End of Options {29 02}
Not all Bios are the same !
And your has not possibility to use FalseClock Method to unlock Menu Tabs !
Regards
[size=undefined]Your Brain [/size]. . . . It's the best tool U can use !
[size=undefined]Don't FLASH the Bios Mod if You get a Size Alert, You risk a Brick !!! [/size]
Donate to me for my work, click here BDM
Posts: 13
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(07-16-2015, 03:19 AM)BDMaster Wrote: Into your Bios such variable is Video Memory :
0x5512C Setting: IGD - DVMT Pre-Allocated, Variable: 0x18C {05 91 3B 02 3C 02 00 0A 34 12 8C 01 04 10 00 3F 00}
0x5513D Option: 0 MB, Value: 0x0 {09 07 68 01 00 00 00}
0x55144 Option: 32 MB, Value: 0x1 (default) {09 07 6D 01 10 00 01}
0x5514B Option: 64 MB, Value: 0x2 {09 07 6E 01 00 00 02}
0x55152 Option: 96 MB, Value: 0x3 {09 07 71 01 00 00 03}
0x55159 Option: 128 MB, Value: 0x4 {09 07 6F 01 00 00 04}
0x55160 Option: 160 MB, Value: 0x5 {09 07 72 01 00 00 05}
0x55167 Option: 192 MB, Value: 0x6 {09 07 75 01 00 00 06}
0x5516E Option: 224 MB, Value: 0x7 {09 07 73 01 00 00 07}
0x55175 Option: 256 MB, Value: 0x8 {09 07 70 01 00 00 08}
0x5517C Option: 288 MB, Value: 0x9 {09 07 76 01 00 00 09}
0x55183 Option: 320 MB, Value: 0xA {09 07 77 01 00 00 0A}
0x5518A Option: 352 MB, Value: 0xB {09 07 74 01 00 00 0B}
0x55191 Option: 384 MB, Value: 0xC {09 07 78 01 00 00 0C}
0x55198 Option: 416 MB, Value: 0xD {09 07 79 01 00 00 0D}
0x5519F Option: 448 MB, Value: 0xE {09 07 7A 01 00 00 0E}
0x551A6 Option: 480 MB, Value: 0xF {09 07 7B 01 00 00 0F}
0x551AD Option: 512 MB, Value: 0x10 {09 07 7C 01 00 00 10}
0x551B4 Option: 1024 MB, Value: 0x20 {09 07 7D 01 00 00 20}
0x551BB Option: 1536 MB, Value: 0x30 {09 07 7E 01 00 00 30}
0x551C2 Option: 2016 MB, Value: 0x3F {09 07 7F 01 00 00 3F}
0x551C9 End of Options {29 02}
Not all Bios are the same !
And your has not possibility to use FalseClock Method to unlock Menu Tabs !
Regards
Yup, I found this part.. But using the grub uefi shell and the setup_var command, I am not able to change the uefi variable's value.
Can it not be directly changed in the BIOS itself? And is there no other way than FalseClock to do this?
Here is the result from the tool you linked: https://www.sendspace.com/file/clf2ca
Thank You for the reply!
Posts: 10,275
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Joined: Oct 2011
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Error 280: Failed to disable write protection for the BIOS space!
Try the Sleep Bug !
Put your laptop into Sleep Mode and then Wacke-Up It, after redo the results file agin
and upload them here !
Let me know
Regards
[size=undefined]Your Brain [/size]. . . . It's the best tool U can use !
[size=undefined]Don't FLASH the Bios Mod if You get a Size Alert, You risk a Brick !!! [/size]
Donate to me for my work, click here BDM
Posts: 13
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Joined: Jul 2015
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(07-16-2015, 12:56 PM)BDMaster Wrote: Error 280: Failed to disable write protection for the BIOS space!
Try the Sleep Bug !
Put your laptop into Sleep Mode and then Wacke-Up It, after redo the results file agin
and upload them here !
Let me know
Regards
Aye aye Captain!
Here is the backup after a sleep wake cycle:
https://www.sendspace.com/file/msro5r
Hope this helps! :D
Posts: 10,275
Threads: 3
Joined: Oct 2011
Reputation:
540
No chance again Error 280 !
Try to fins a previous Bios to Downgrade and redo the resuts !
Anyway to make this job You need the tools like here :
https://www.bios-mods.com/forum/Thread-R...5#pid74575
Regards
[size=undefined]Your Brain [/size]. . . . It's the best tool U can use !
[size=undefined]Don't FLASH the Bios Mod if You get a Size Alert, You risk a Brick !!! [/size]
Donate to me for my work, click here BDM
Posts: 13
Threads: 1
Joined: Jul 2015
Reputation:
0
(07-16-2015, 03:40 PM)BDMaster Wrote: No chance again Error 280 !
Try to fins a previous Bios to Downgrade and redo the resuts !
Anyway to make this job You need the tools like here :
https://www.bios-mods.com/forum/Thread-R...5#pid74575
Regards
Since this is a new model, lenovo does not seem to have a previous version on their site. Yup I tried renaming the URL. Mine is 1.04.
And those tools would be an overkill!
Anyway, thanks a lot for your time! I hope the community does find a workaround sometime in the future though!
Posts: 13
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Joined: Jul 2015
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(07-15-2015, 11:28 PM)thePsguy Wrote: Hola Amigos!
I am in the process of getting Mac OSx Yosemite Set up on my Lenovo Z51 Laptop, and am facing an issue with the DMVT Prealloc Memory
in the UEFI BIOS.
I Followed some guides for older laptops and found that I need to set the setup variable 0x18c to 0x3, but unfortunately, this is not possible since the H2O Bios Versions available for my laptop.
My BIOS Dump : https://www.sendspace.com/file/9pg2vz (Universal BIOS Backup toolkit could not identify my bios, so i used its custom option 8192K, is it the correct way to extract?)
EDIT: HERE is the rar from the BACKUP tools, https://www.sendspace.com/file/a1yrrg
Below are the Snaps of my present bios:
I need help in either changing the 0x18c setup variable to 0x3, or i've read in some places, to unlock the hidden menu to be able to do
such things.
Any and all help is needed and very much appreciated!
THANK YOU!
With hopes sky high,
thePsguy.
Been a long time I know.
Could someone please help in finding the whitelist in the bios? as in which all vendor and product ID's are allowed?
Posts: 13
Threads: 1
Joined: Jul 2015
Reputation:
0
Hello there!
I would be really grateful if you could help me unlock the advanced settings tab on my BIOS, v2.00
I have attached the results from Universal Bios Backup Tool (Which could not automatically identify, so i chose 8192K), And the backuptools12.exe in a single archive at
https://www.sendspace.com/file/pzsuvk
Looking forward to a reply!
thePsguy :D
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