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E6220 - Dual monitor dock issue


MikeGiff
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Hi

 

Im having trouble getting dual external monitor output when docked.

I have 1x DVI connected and 1x HDMI using a HDMI to DP adaptor.

 

I cannot recognise the HDMI/DP monitor.  DVI works ok.

 

I am running Sierra using Clover as per Jake Lo's guide.  First question is - should this work OOB based on the standard bootpack from the guide?  Have tried booting with lid open/closed, sleeping then wake, only one monitor connected etc.  but nothing seems to recognise the HDMI.

 

Thanks

Mike

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HD3000 only supports 2 x concurrent displays, not 3. As such, you can get dual external displays if and only if the lid is closed. Once you've applied the appropriate SNB framebuffer patches, all will work. Check these posts: 
https://osxlatitude.com/index.php?/topic/7914-dell-latitude-e6220-with-i5-2520m-hd3000-and-1366x768-lcd-mavericksyosemiteel-capitansierra/&do=findComment&comment=52237
https://osxlatitude.com/index.php?/topic/7914-dell-latitude-e6220-with-i5-2520m-hd3000-and-1366x768-lcd-mavericksyosemiteel-capitansierra/&do=findComment&comment=57882
https://osxlatitude.com/index.php?/topic/7914-dell-latitude-e6220-with-i5-2520m-hd3000-and-1366x768-lcd-mavericksyosemiteel-capitansierra/&do=findComment&comment=58826
https://osxlatitude.com/index.php?/topic/1969-guide-for-enabling-vga-and-hdmi-in-intel-hd3000-gpu/

If you use this patch for port 0205:

02 05 00 00 00 08 00 00 06 00 00 00   // patched: HDMI/DP display port (built-in/docking port)

I expect you'll be able to use the HDMI port or the DP port without further mod. I'll have to verify that, it's been a while since I last played with this...

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I don't seem to be having much luck.

 

I updated the Kext by basically changing the following

02 05 00 00 00 08 00 00 05 00 00 00

to 

02 05 00 00 00 08 00 00 06 00 00 00

 

Followed by copy to /S/L/E and Repair/Rebuild then reboot.

I still don't get the DP monitor show up when I do a 'detect displays'.

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Sorted with following SNB patch:

01 02 04 00 10 07 00 00 10 07 00 00   // vanilla: nb of connectors -> "04"
05 03 00 00 02 00 00 00 30 00 00 00   // vanilla: laptop's own LCD display
02 05 00 00 00 08 00 00 05 00 00 00   // patched: HDMI, display port #5 (built-in port)
03 04 00 00 00 04 00 00 06 00 00 00   // patched: DP, display port #6 (docking-station port)
04 06 00 00 00 04 00 00 07 00 00 00   // patched: DVI, display port #7 (docking-station port)
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