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Installation of El Captain on inspiron 5558

Ehsaan Elahi

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Set DVMT to 96MB (0x3) as per FireWolf’s guide

Steps to change the DVMT value (Done on Windows or WinPE)


1) Universal BIOS Backup ToolKit 2.0.exe - to backup the BIOS 

2UEFITool.exe to find the module labeled Setup or something with Setup in it and extract the PE32 image section (setup.bin)

3) Universal IFR Extractor.exe to extract setup.bin to a readable text file

4) Use notepad to search for “DVMT” in the text file,  

    Locate the value where DVMT is found

5) Format a USB drive to fat32 and create a folder name EFI (SD Card works too)

6) Download the EFI Shell and extract the Boot folder to EFI folder

7) Boot system with the USB and select UEFI Boot

8) At the grub prompt, enter these commands, hit enter after each command, then exit and reboot

    setup_var 0x3

   i.e. setup_var 0x432 0x3


To verify, just enter setup_var 0x432 and hit enter, the value will be listed

Note: May have to reset setting again after BIOS upgrade


If you need help, then just extract the ROM file, compress and attach it here.

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