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[Request] Dell Latitude E6420 Bios unlock [BIOS]
Hi lovely Bios modders and helpful people!

I've created this request regarding my bios, and the problematic situation i am in. Mainly, it's a request for bios unlocking and few different things explained underneath.
[Image: star-line-break.png]
1.1 Detailed information

Bios update information & link:

Bios: Dell A23 for the Dell Latitude E6420
Bios type: UEFI/EFI
Direct link:

So, the details of my computer:

Quote:Dell Latitude E6420
Intel i5 2520m
Ram: 4GB
Windows 7 64 bit
Chipset: QM67, 6 series/C200.

In details:
Quote: Processor Name:                         Intel Core i5-2520M
  Original Processor Frequency:           2500.0 MHz
  Original Processor Frequency [MHz]:     2500
  CPU ID:                                 000206A7
  CPU Brand Name:                         Intel® Core™ i5-2520M CPU @ 2.50GHz
  CPU Vendor:                             GenuineIntel
  CPU Stepping:                           J1
  CPU Code Name:                          Sandy Bridge-MB SV
  CPU S-Spec:                             SR048
  CPU Thermal Design Power (TDP):         35.0 W
  CPU IA Cores Thermal Design Current (TDC): 112.0 A
  CPU GT Cores Thermal Design Current (TDC): 35.0 A
  CPU Power Limits (Max):                 Power = 56.00 W, Time = 64.00 sec
  CPU Power Limit 1 - Long Duration:      Power = 35.00 W, Time = 28.00 sec [Locked]
  CPU Power Limit 2 - Short Duration:     Power = 43.75 W, Time = Unlimited [Locked]
  CPU Type:                               Production Unit
  CPU Platform:                           Socket G2 (rPGA988B)

Quote: [Video chipset]
  Video Chipset:                          Intel HD Graphics 3000
  Video Chipset Codename:                 Sandy Bridge GT2+
  Video Memory:                           1839642 KBytes
 [Video Card]
  Video Card:                             Intel Sandy Bridge-MB GT2+ - Integrated Graphics Controller [D2/J1/Q0] [DELL]
  Video Bus:                              Integrated
  Video RAMDAC:                           Internal
  Video BIOS Version:                     Unknown
  Processor Clock:                        648.5 MHz
  Memory Clock:                           665.0 MHz
  Hardware ID:                            PCI\VEN_8086&DEV_0126&SUBSYS_04931028&REV_09
  PCI Location (BusBig Grinev:Fnc):             0:02:0

Quote: Motherboard Model:                      DELL 0K0DNP
  Motherboard Chipset:                    Intel QM67 (Cougar Point) [B3]
  Motherboard Slots:                      1xPCI, 6xPCI Express x1, 1xPCI Express x4, 3xPCI Express x16
  PCI Express Version Supported:          v2.0
  USB Version Supported:                  v2.0
 [PCH Features]
  USB Port Count:                         14 ports
  RAID Capability:                        RAID0/1/5/10
  SATA Ports 2 and 3:                     Supported
  SATA Port 1 6 Gb/s:                     Supported
  SATA Port 0 6 Gb/s:                     Supported
  PCI Interface:                          Not Supported
  PCI Express Ports 5 and 6:              Supported
  USB Redirect (USBr):                    Supported
  Intel Anti-Theft Technology:            Not Supported
  PCI Express Ports 7 and 8:              Supported
  PCH Integrated Graphics Support:        Supported
  Data Center Manageability Interface (DCMI): Supported
  Node Manager:                           Supported
  BIOS Manufacturer:                      Phoenix Technologies
  BIOS Date:                              01/04/2016
  BIOS Version:                           A23
  UEFI BIOS:                              Capable
  Super-IO/LPC Chip:                      SMSC FDC37C93xFR
[Image: star-line-break.png]
1.1 Basic information about my problems

What i'm trying to achieve: 
External GPU + Internal GPU at the same time.
((My external GPU is connected via the mini pci-e slot))

What's wrong: 
When i boot with the External GPU, the internal GPU and internal screen get's disabled. Only external gpu and screen is detected.

What I want:
 External GPU & External Screen working at the same time as the Internal GPU and Internal Screen, bios seems to ignore the EFI variables, somehow. + Unlock the bios with hidden menus (if possible.) Mostly preferred the video settings/menu.

[Image: star-line-break.png]
1.2 What i have tried
I have tried to edit the UEFI variables by using the EFI Shell and manually extracting the IFR file from the bios to get these values.

Quote:Setting: Internal Graphics, Variable: 0xBB[1] {05 09 BB 00 01 C4 01 C5 01}
0x48B78                                                                                                                                         Option: Auto, Value: 0x2 {09 09 27 01 02 00 13 00 00}
0x48B81                                                                                                                                         Option: Disabled, Value: 0x0 {09 09 29 01 00 00 10 00 00}
0x48B8A                                                                                                                                         Option: Enabled, Value: 0x1 {09 09 28 01 01 00 10 00 00}
Setting: Primary Display, Variable: 0xB9[1] {05 09 B9 00 01 B1 01 B2 01}
0x48A6B                                                                                                                                         Option: Auto, Value: 0x3 {09 09 27 01 03 00 13 00 00}
0x48A74                                                                                                                                         Option: IGFX, Value: 0x0 {09 09 B3 01 00 00 10 00 00}
0x48A7D                                                                                                                                         Option: PEG, Value: 0x1 {09 09 B4 01 01 00 10 00 00}
0x48A86                                                                                                                                         Option: PCI, Value: 0x2 {09 09 B5 01 02 00 10 00 00}
0x48A8F                                                                                                                                         Option: SG, Value: 0x4 {09 09 B6 01 04 00 10 00 00}
I used the following in EFI shell:
Quote:  Quote
setup_var 0xBB 0x1
setup_var 0xB9 0x0

[Image: star-line-break.png]
1.3 Summary
To summarize, 

The bios simply ignores the UEFI/EFI variables and still disables the internal screen and internal GPU!
Can someone help me, repair this, at-least force it to keep the primary display the internal, and external GPU.
Hot plugging does not work for me either.

TL;DR: Bios unlocking request, hidden menus & possible a way of forcing the internal screen and graphics to stay on with the external graphics card.

Thanks for reading & Best regards,

P.S: I apologize for the colourful, and huge text. Browser is bugged for me, so I couldn't adjust it within my needs.
i own the Dell Latitude E6420 and I want to install an egpu. However therefore I need to unlock the bios in order to enable hot plug in the bios.
It would be nice if you could hekp me.
(09-02-2018, 03:17 AM)ashold7 Wrote: Hello,
i own the Dell Latitude E6420 and I want to install an egpu. However therefore I need to unlock the bios in order to enable hot plug in the bios.
It would be nice if you could hekp me.

Hey, I own the same laptop and to get the egpu working via expresscard and mini pcie you need to use nandos DIY egpu setup 1.35 which costs 10 bucks, otherwise you are stuck using pcie 1.1 x1 instead of pcie 2.0 x1. You need to be using an Nvidia GPU to use your internal screen and disable the built in dGPU using the DIY setup but keep the iGPU on. From there you may need to mod your graphics driver to trick nvidia to think you have a laptop variant gpu (newer nvidia drivers i noticed enable this automatically on the GPUs still getting driver support since newer laptops come with full desktop variant GPUs). using the external monitor gives a huge performance boost if you have the quad core i7 dell latitude e6420
Hi, is it possible to enable hidden options in Dell Latitude E6420 BIOS? It is Phoenix BIOS. Strange because most Optiplex use AMI BIOS and new Inspiron (such as Inspiron 15 7567) use AMI BIOS.

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