Latitude 5510: BIOS UEFI variables decode (to enable 4K@60Hz and disable CFG lock)

[esmith1966]

My Dell BIOS is latest version...

 

Following these instructions to determine the correct UEFI variables to set so that I can enable 4k@60hz and to disable CFG lock

 

1. Download your BIOS flash program via Dell (search for your model, then click Drivers and Downloads and filter for BIOS) - Completed

 

2. Dell_PFS_Extract: Select folder containing your Dell .exe file (This will extract the raw BIOS .bin file) - Completed

 

3. UEFITool_NE_A58: Open 1 System BIOS with BIOS Guard vx.x.x.bin and export the Setup IFR section - Cannot figure this out... Stopped here cause I can't figure it out...

 

4. Ifrextractor: Use Section_PE32_image_Setup.sct as input file and write output to Section_PE32_image_Setup IFR.txt  - Cannot figure this out...

 

5. Find variables by their name in the .txt file via Ctrl + F (e.g. DVMT or CFG or Thunderbolt) - Cannot figure this out...

 

These are the extracted Bios Files

https://www.dropbox.com/scl/fi/94pcxyxvotpm081r4aa7t/Latitude_5X11_Precision_3551_1.31.1.exe_extracted.zip?rlkey=rudezr9w5zzg6iwm8ulvlg3zu&st=t4pmip2h&dl=0

 

Can someone help me regarding this...

 

All of this is from this site where 4k etc was enabled...

https://github.com/MokkaSchnalle/macOS-Dell-5411-5511

[BillDH2k]

Here is what I found for 5410/5510 Latitude (results from 1.20 and 1.31 BIOS are the same):

• CFG Lock - Offset = 0x3E,  VaStoreID = 0x11 ("CpuSetup")
• DVMT Pre-Allocated - Offset = 0xF5, VaStoreID = 0x16 ("SaSetup")
• DVMT Total Gfx Mem - Offset = 0xF6, VaStoreID = 0x16 ("SaSetup")

I used modGRUBShell.efi, here are the commands:

• setup_var_cv CpuSetup 0x3E 0x1 0x0              (Disable CFG Lock)

• setup_var_cv SaSetup 0xF5 0x1 0x2                 (DVMT Pre-Allocated = 64MB)

• setup_var_cv SaSetup 0xF6 0x1 0x3                 (DVMT Total Gfx Mem = Max, if needed)