Does this BIOS have FLOCKDN bit in the BiosRegionLockDxe, or is just removing PRR adequate.

Also, sorry for this silly question, but why not just update the bios using the normal vendor available methods, since the hard part here was update the ME region, I would think you have r/w access to bios.bin region just by default, so shouldn't the regular "vendor approved" ways of updating the bios be adequate? Thanks.

Zitat von nikey22 im Beitrag #16

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[...] why not just update the bios using the normal vendor available methods

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Zitat von nikey22 im Beitrag #16

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since the hard part here was update the ME region I would think you have r/w access to bios.bin region just by default, so shouldn't the regular "vendor approved" ways of updating the bios be adequate?

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That post belongs here hehe. Too bad about the external flash. How did Wootever succeed with all software solution to the Xiaomi?

Anyway, this is a giant step indeed. Well done!

@Outsyde: Do you know the variables for vccio and vccsa for the Y700? I've been doing some memory overclocking (stock Hynix 2133 RAM) but can't get DDR4 2800 MHz stable without resorting to throttlestop, with mixed results. I can do DDR4 2400 @ 11-12-12-28; DDR4 2600 @ 12-14-14-30; DDR4 2667 @ 13-14-14-32; all stable @ stock vddq voltage of 1.20v. I have to bump this to 1.25v to get DDR4 2800 MHz stable (somewhat) with the help of throttlestop (raising SA offset by about 0.025v.

I wonder if any of the settings above are exposed in the "Advanced" menu in bios. If so, they'll be worth tracing down. Thanks.

Zitat von Zucker2k im Beitrag #19

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@Outsyde: Do you know the variables for vccio and vccsa for the Y700? I've been doing some memory overclocking (stock Hynix 2133 RAM) but can't get DDR4 2800 MHz stable without resorting to throttlestop, with mixed results. I can do DDR4 2400 @ 11-12-12-28; DDR4 2600 @ 12-14-14-30; DDR4 2667 @ 13-14-14-32; all stable @ stock vddq voltage of 1.20v. I have to bump this to 1.25v to get DDR4 2800 MHz stable (somewhat) with the help of throttlestop (raising SA offset by about 0.025v.

I wonder if any of the settings above are exposed in the "Advanced" menu in bios. If so, they'll be worth tracing down. Thanks.

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@felix - Probably 2-4 bytes edited, that's usually all you need to change on Insyde BIOS to unlock BIOS menus

Dudu2002 is over at BIOS-mods.com forum if you wanted to talk to him about it, or have him unlock for you, but you need flash programmer like CH341A + SOIC8 test clip with cable and then dump your BIOS and send to him then he will unlock for you.

Zitat von Lost_N_BIOS im Beitrag #21

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@felix - Probably 2-4 bytes edited, that's usually all you need to change on Insyde BIOS to unlock BIOS menus

Dudu2002 is over at BIOS-mods.com forum if you wanted to talk to him about it, or have him unlock for you, but you need flash programmer like CH341A + SOIC8 test clip with cable and then dump your BIOS and send to him then he will unlock for you.

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@felix - You're welcome! If you want, and he hasn't replied, link me to your latest BIOS download at Lenovo site and I will see if I can do the edit for you.
Sometimes I can do, if I can see correct edit location, but Insyde BIOS beats me sometimes
But, even if I do it, you will need to dump and send me the file so I can apply the edit then you program back.

Also, sometimes there may be a way around that without programmer, but I'll have to look at BIOS settings, and then we'll have to try something and see outcome!

@Lost_N_BIOS

Thank you very much, i appreciate your kind offer.

Previously (when i tried to unlock DMI3.0 for having full speed of my NVMe SSD) i had done some trials with h2OUVE etc.

If you would like to take a look, i have attached full UEFI Protocol Menu and current Bios i am running (Lenovo Download extracted in .fd form, not dump from actual system), in the zip below :

@felix - You're welcome! Please link me to the BIOS download page from Lenovo as I asked, thanks, this is all i need.
DMI3 thing, if it's a BIOS setting, we can change without flashing or making mod BIOS, same way we will possibly disable FPRR to bypass 167 error

@Lost_N_BIOS

I have version CDCN53WW, no longer available for download, but i believe that if you change the verison from the current bios download link, you can download it also :

https://download.lenovo.com/consumer/mobiles/cdcn54ww.exe

The Full download page is as follows :

https://pcsupport.lenovo.com/us/en/produ...nloads/DS112253

As for DMI setting, i have changed it on the fly, using UEFI Variable Editor utility. I did it some months after purchase and was the best mod possible for this laptop.


Previous zip file also has a .txt file with the UEFI variable menu, i believe i had extracted it with UEFI Tool 0.25.0 if i remember correctly.

@felix - yes, thanks, https://download.lenovo.com/consumer/mobiles/CDCN53WW.exe gives the version you mentioned
I checked, 167 is not set via BIOS setting

Finally, i found time and disassembled my laptop to get a dump from Bios ic.

There are 2 SPI ic's in the back of the board (the side facing to the back side of the keyboard, you need to get the board out completely).

One Winbond 25Q32FVS1Q, which returned a dump file of 4.00MB and full of FF's. Obviously this is not needed, unless by programmer could not read that correctly.

The other one is a GigaDevice GD25Q64CSIG, which returned a dump file of 8.00MB and of various content.

Zitat von felix im Beitrag #28

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Finally, i found time and disassembled my laptop to get a dump from Bios ic.

There are 2 SPI ic's in the back of the board (the side facing to the back side of the keyboard, you need to get the board out completely).

One Winbond 25Q32FVS1Q, which returned a dump file of 4.00MB and full of FF's. Obviously this is not needed, unless by programmer could not read that correctly.

The other one is a GigaDevice GD25Q64CSIG, which returned a dump file of 8.00MB and of various content.

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