How to Configure 4K Resolution for an Optiplex 3090 MFF ?

[gatorback]

BACKGROUND: An Optiplex 3090 MFF iGPU-HD630 is outfitted with Monterey \ Opencore REL-077-2022-01-10:

Is there any reason Monterey will not boot on a OptiPlex MFF 3090 i3-10105?

The i5 3090 MFF seems to support Monterey: https://github.com/Aaron9466/dell-optiplex-3090mff-opencore lshw output of the 3090 MFF Intel(R) Core(TM) i3-10105T CPU @ 3.00GHz version is attached. Attempts to boot a Monterey USB installer were unsuccessful. UNRESOLVED RELATED POSTINGS...

www.tonymacx86.com

The Optiplex is connected with a 4K DisplayPort cable to a 4K monitor.


ISSUE: the higher resolution is 2560X1440.

QUESTION: What can be done to configure 4K display output?

UPDATE: A Windows-10 SSD was booted in the Optiplex 3090: it automatically detected and configured the 4K monitor for 3840X2160 (4K) resolution. If only Monterey could do the same... and deliver from Displayport to HDMI.

 

[theroadw]

You need to configure the bios so that DVMT is 64MB or higher. Some bioses give the option, some you have to find and set the variable using ru or modified efi shell.

 

[trs96]

Some bioses give the option, some you have to find and set the variable using ru or modified efi shell.

The latter is true for every Dell I've ever owned. The DVMT BIOS setting is hidden from the BIOS GUI.

 

[trs96]

Here's the directions for how to extract the BIOS and find the DVMT variable so you can modify it.
If you want 64MB for the DVMT pre-allocation then set it to 0x02.

GitHub - JimLee1996/Hackintosh_OptiPlex_9020

Contribute to JimLee1996/Hackintosh_OptiPlex_9020 development by creating an account on GitHub.

github.com

 

[gatorback]

Glad that there is a remedy: increase BIOS parameter DVMT.

* Any guidance for choosing a optimal setting (64MB vs 128MB) is appreciated. I expect a 32GB RAM chip for the system tomorrow

* " find and set the variable using ru or modified efi shell" What is "ru"? What is a modified efi shell?

From the Optiplex 3090:

1) outfitted with a Windows 10 SSD
2) Downloaded JimLee1996's BIOS tools (click here) from GitHub
3) via Windows OS: BIOS_Backup_TooKit.exe to fetch BIOS rom

Step 3 produced a 16MB ROM file (attached)

4) ./ifrextract 3090MFF_BIN.bin output.txt returns:

Input: 3090MFF_BIN.bin​

Output: output.txt​

Protocol: UNKNOWN​

error: Unknown protocol​

ROM viewer (UEFI Tool) crashes when opening attached ROM file.


Have I provided enough for senior members to diagnose the cause of the crash? Is there a problem with Step 3? Grateful for the support and helpful responses.

 

[gatorback]

Is a change to config.plist a possible remedy to the 4K problem? I ask because it seems less risky to mod the config.plist vs. patching the BIOS.

<< Solved >> - Dell Optiplex 7020 - 4K monitors on Intel 4600 Integrated GPU

No problem @nicksoph, here is my complete OpenCore folder with a few things to note: Thanks for doing that , not going to be playing for a while - Im away from home and hacks for a while but will when I get back. Im sure it will be useful to others in the meantime. You might be interested in...

www.tonymacx86.com

 

[trs96]

Is a change to config.plist a remedy to the 4K problem? I ask because it seems less risky to mod the config.plist vs. patching the BIOS.

There's no BIOS patching involved. All you're doing is discovering a hidden BIOS setting, then changing it via ModGRUBShell.efi. Really very minimal risk involved. Have you ever changed a BIOS setting such as Legacy to UEFI ? It's really no different to change DVMT 32MB to 64MB. Why Dell had to hide that option from view, we'll never know.

 

[trs96]

Glad that there is a remedy: increase BIOS parameter DVMT.

* Any guidance for choosing a optimal setting (64MB vs 128MB) is appreciated. I expect a 32GB RAM chip for the system tomorrow

* " find and set the variable using ru or modified efi shell" What is "ru"? What is a modified efi shell?

From the Optiplex 3090:

1) outfitted with a Windows 10 SSD
2) Downloaded JimLee1996's BIOS tools (click here) from GitHub
3) via Windows OS: BIOS_Backup_TooKit.exe to fetch BIOS rom

Step 3 produced a 16MB ROM file (attached)

4) ./ifrextract 3090MFF_BIN.bin output.txt returns:

Input: 3090MFF_BIN.bin​

Output: output.txt​

Protocol: UNKNOWN​

error: Unknown protocol​

ROM viewer (UEFI Tool) crashes when opening attached ROM file.


Have I provided enough for senior members to diagnose the cause of the crash? Is there a problem with Step 3? Grateful for the support and helpful responses.

Have a look at this post by Craig H. He was able to figure this out. It's always rather fiddly for beginners. As expected. https://www.tonymacx86.com/threads/...600-integrated-gpu.282589/page-5#post-1999339

Also this post by nicksoph is a good description of the process. I always use a DVMT value of 64MB instead of 96. Works perfectly with my Dell machines. Really no advantage to set it any higher than that.

<< Solved >> - Dell Optiplex 7020 - 4K monitors on Intel 4600 Integrated GPU

I'm doing screen grabs in windows.

www.tonymacx86.com

 

[craighazan]

Have a look at this post by Craig H. He was able to figure this out. It's always rather fiddly for beginners. As expected. https://www.tonymacx86.com/threads/...600-integrated-gpu.282589/page-5#post-1999339

I did that?!.

 

[trs96]

I did that?!

Yes sir, you did. Nice work.