Jump to content

Dell Optiplex 3040 dual monitor support - Mojave


bmwhitetx
 Share

Recommended Posts

I have successfully installed Mojave 10.14.5 on my Optiplex 3040. I used the vanilla method using WEG and display 1219 as so:

 

AAPL,ig-platform-id = <00001219>
framebuffer-fbmem = <00009000>
framebuffer-patch-enable = <01000000>
framebuffer-stolenmem = <00003001>
 

This 3040 has one DP and one HDMI port. I have identical HDMI monitors hooked to these ports (one is using a DP-HDMI cable obviously). If I boot with both monitors I get a display on the DP output, nothing on HDMI. If I unplug the DP cable, I get display on the HDMI port. I have attached my IOReg file when booting with both attached, note that display0 is attached to framebuffer2, port 0x6, type 0004. When I boot with just the HDMI port connected, display0 moves over to framebuffer1, port 0x5, type 0008. HDMI audio works fine using either port.

 

I have read about putting in additional device properties so WEG can connect the ports but have been unsuccessful (over my head).  For example, I used Jake's 7040 plist,shown here: 

#framebuffer-con3-alldata = <03060a00 00040000 87010000>
#framebuffer-con3-enable = <01000000>
AAPL,ig-platform-id = <00001219>
device-id = <12190000>
enable-hdmi20 = <01000000>
framebuffer-con1-alldata = <01050900 00080000 87000000>
framebuffer-con1-enable = <01000000>
framebuffer-fbmem = <00009000>
framebuffer-patch-enable = <01000000>
framebuffer-portcount = 4
framebuffer-stolenmem = <00003001>
framebuffer-unifiedmem = <00000080>
 

I booted with framebuffer-con3* commented and uncommented, neither way worked. This pc has two DP and 1 HDMI though. Some are successful doing Kernel patching AppleIntelSKLGraphicsFramebuffer.kext but that didn't work and maybe that technique stopped working with later versions of Mojave?? I'm hoping someone can provide the device properties I need to put in config.plist to get both monitors working. Thanks!

 

 

iMac.ioreg.zip config copy 2.plist.zip

 

 

properties.png

Link to comment
Share on other sites

Thank you Jake for the quick reply, but those values did not work. I tried booting with both monitors attached and then hot-plugging the HDMI afterwards. To be clear both values you provided above go in the Devices Properties section right? The 0x prefix on the ig-platform-id gave me pause since I normally see that when it is put in the Graphics section. My Graphics section is blank (No Inject Intel, no ig-platform-id). I changed AAPL,ig-platform-id to 05003b19 (without the 0x prefix). See CC screenshots.

 

My IORegfile changed quite a bit also, hardly anything in the IGPU section.  And my graphics memory went from 1536 to 7 MB.

 

DeviceProperties.png

 

Graphics.png

iMac2.ioreg.zip

Link to comment
Share on other sites

Still not working unfortunately. I have been doing more reading and it seems like it should work. I even tried ig-platform-id = 00003b19 (0x193b0000) which shows to have a DP and HDMI port but that didn't work either. I'll keep playing with it.I can't find any other configs where folks are using WEG Device Properties to get dual monitor. They seem to be using the older Inject Intel and platform-id in the Graphics section.

Link to comment
Share on other sites

 Share

×
×
  • Create New...