Only one external display using dock

[Mattadur]

I'm using the dock (thinkpad pro 40a1) with a dvi -> hdmi and dp-> hdmi on two external 1920x1080 monitors (both are the same monitors, VG245 ASUS). One is displayed as an external while the other one is just black. They both can output but wont work if use simultaneously.

I see that index 1 (0x05) (hackintool, under patch -> connectors) isnt being used, is that the miniDP port? I switched between the DVI and DP on the dock and they only output using index 2 (0x04).

I also tried the vga port and that just ends up mirroring both external displays.

Am I missing something or doing something wrong? How did you manage to get the 2 external displays?

Thanks in advance!

[Mattadur]

I noticed that I can get dual external using the miniDP and the DP on the dock.

Is there a way to just use the dock for dual external displays?

[jestercore]

Try these clean DeviceProperties for HD 5500:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>PciRoot(0x0)/Pci(0x2,0x0)</key>
	<dict>
		<key>AAPL,ig-platform-id</key>
		<data>BgAmFg==</data>
		<key>framebuffer-fbmem</key>
		<data>AACQAA==</data>
		<key>framebuffer-patch-enable</key>
		<data>AQAAAA==</data>
		<key>framebuffer-stolenmem</key>
		<data>AAAwAQ==</data>
	</dict>
</dict>
</plist>

So, it will look like this

I discovered it works the same without additional keys. Maybe it will be better for docking.