External Display (USB-C to DisplayPort) not Working

[riptidewave93]

Hello, first off I want so say great work on this repo!

Currently I am unable to get external displays to work with my XPS 13. My laptop model specs are: Core i7 6560U Intel Iris 540 Graphics 8GB DDR3 HighDPI Display (3,200 x 1,800)

The issue is that OSX detects the display, and properly shows supported resolutions, but the external display never detects a signal.

The adapter I am trying to use can be found at https://www.amazon.com/AllSmartLife-DisplayPort-Aluminium-resolution-ChromeBook/dp/B017TZTMBG, and works on Linux (4.10 kernel) and Windows 10.

Please let me know what information I can provide to try and help get this resolved.

[R1MnTnA]

Please also see issue #33

[R1MnTnA]

@riptidewave93 Did issue #33 help to resolve this issue? If so please close.

[riptidewave93]

@R1MnTnA Sadly nothing in https://github.com/syscl/XPS9350-macOS/issues/33 helps. This issue occurs when the device is booted with the adapter, or when it's hot-plugged. Either way, it fails to display on my display.

[R1MnTnA]

You may want to try a different model then. Some of the reviews on Amazon say it doesn't work on people's MacBooks. Even though it says it says it in the title. I ordered this one- TechOrbits USB 3.1 Type C (USB-C & Thunderbolt 3 Port Compatible) to HDMI Adapter 4K Resolution USB-C to HDMI Support for MacBook Chromebook Pixel and https://www.amazon.com/dp/B01G2OB1AK/ref=cm_sw_r_cp_apip_o444MR97wRFIl and video works great, but still can't get audio to work through HDMI to TV on Mac, works fine on Windows though. Not sure if the adapter is not compatible with Mac or if I need a patch. @syscl do you know of any patch or fix to allow audio through the usb-c to hdmi adapter? It doesn't show up in my audio speaker output in MacOS.

[R1MnTnA]

Sorry @riptidewave93 I just realized you have usb-c to display port, not HDMI. Still I think it's worth a shot to try a different adapter after reading those reviews.

[riptidewave93]

@R1MnTnA I have no issues trying another adapter, but I can confirm this adapter does work with Linux and Windows without issue. With that said, are there any recommendations on an adapter that's a mini-display port?

[R1MnTnA]

This one seems to have all positive reviews from Mac users. - UPTab USB-C Type C to Mini DisplayPort Adapter 4K@60Hz https://www.amazon.com/dp/B01N4FQNYW/ref=cm_sw_r_cp_api_S-KQybB5E1JFV

[riptidewave93]

@R1MnTnA I will wait for it to be in stock and then see if that adapter gives me any better luck. With that said, as mentioned earlier the adapter works with Windows and Linux on the XPS 13, so I doubt it's the adapter.

[aizigao]

I have 2 extend display which one has hdmi port,I use type c to hdmi adapter， it works well。 In my company I use display with dp port，I try port-->hdmi-->type c ，it couldn't work, then I used dvi-d-->hdmi-->typec，it works,but some I get a black screen... I think I should buy a minidp2typec 😭

[syscl]

Hi @-all, please give new SSDT-XHC a try.

@R1MnTnA @bozma88 @aizigao ...

syscl

[riptidewave93]

@syscl Thanks, for me this change has resolved my issue! 👍

[bozma88]

@riptidewave93, still no hotplugging, right?

[riptidewave93]

@bozma88 Hotplug with my USB-C to Displayport adapter is working fine. If you are asking about Hotplug with USB-C devices, such as my Dell D200 adapter, that still does not hotplug correctly but that should probably be kept to the issue at https://github.com/syscl/XPS9350-macOS/issues/33

[bozma88]

Yes, you're right.

[R1MnTnA]

@syscl Thank you for this update. Although I will have to wait a few more days to try it on my 9360. Dell is currently replacing my motherboard with the a new version. As soon as I get it back I'll try this and report back. Again thank you for all your hard work and dedication.

[syscl]

Hi @riptidewave93 , which issue has been solved with the latest SSDT-XHC?

Thank you, syscl

[syscl]

@aizigao Which one works? Or with the latest SSDT-XHC solve some issue?

---

@aizigao 之前不用SSDT-XHC的时候无法正确工作吗？因为我没有设备，只能根据你们的反馈情况来判断？新的SSDT－XHC修复了哪一个问题呢？谢谢

syscl

[aizigao]

我刚删了回复，是因为我刚刚屏又黑了一下。。。现在用的是最新的文件的说。

---

• 之前不用ssdt-xhc也是可以工作，但是有时候用着用着就黑屏了，然后要再插拔一下，比较频繁。
• 现在这个ssdt-xhc 感觉比原来的没有时候稳定一些，今天用一天，也黑屏了一两次。
• 我用的是 typec 转 hdmi的接口。。。

[riptidewave93]

@syscl The original issue in the OP, so my USB-C to DisplayPort adapter is now working with my monitor, and it supports hotplug.

[syscl]

Hello @riptidewave93 , could you please provide your ioreg through this way?

Thank you! syscl

[riptidewave93]

@syscl Attached you can find a dump. Hope I did this correctly. 😄 MacBook.zip

[syscl]

@riptidewave93 Thank you, but I do not see any USB-C device...

syscl

[riptidewave93]

@syscl if it helps, this is just a thunderbolt 3 to DisplayPort, so it's possible it does not show as a USB device. Maybe that explains why it does not show as a USB-C device?

[syscl]

@riptidewave93 Oh, I see...

So, you use your monitor with USB-C port directly? Without any other adapter/dongle? And the monitor use USB-C port as well?

Thank you, syscl

[riptidewave93]

@sysclI I use a USB-C to Mini DisplayPort adapter, specifically this one, to directly connect my montior to my laptop.

[syscl]

@riptidewave93 Thank you.

Now, I know this is a DP connector, @riptidewave93 please try this config.plist I made for you

config.plist.zip

Then attach the new ioreg. I correct the connector-type

syscl

[bozma88]

On XPS line, thunderbolt chip and USB 3.1 chip activate and expose themselves to the OS only when a peripheral is attached. This is why we don't have hotplug for USB and TB, because natively MacOS does not handle this behaviour. But I think that someone (@wmchris) managed to make it work on 9550.

[riptidewave93]

@syscl Applied the config directly to the Clover folder in EFI and rebooted. External monitor no longer works, same issue as in OP. Laptop detects the display, but nothing outputs.

MacBook.zip

[syscl]

So precious config.plist work, but the latest/experimental one break the output, right?

syscl

[riptidewave93]

@syscl Correct. 😄

[syscl]

Thank you for your feedback. Hmmm, weird, DP should have connector-type <00 04 00 00> but we need to use HDMI connector-type <00 08 00 00> to light the external screen up.

syscl

[riptidewave93]

Hmm, so I restored my last config.plist but now my adapter no longer works... will need to spend more time playing with this.

[riptidewave93]

@syscl Huh, well now I am stumped. No matter what I do, I can no longer get my display adapter to work. With, or without, the above config.plist you shared. If it would be easier, and you are in the US, feel free to email me and I will pay for an adapter for you.

[R1MnTnA]

@riptidewave93 not sure if this would help, but try refreshing your kext cache. sudo touch /System/Library/Extensions && sudo kextcache -u / and reboot.

[riptidewave93]

@R1MnTnA Gave it a try, it has no effect on the issue.

[syscl]

@riptidewave93 Please post ioreg with monitor plug in this time.

syscl

[syscl]

@riptidewave93 Please try the latest deploy.sh, I've fixed some XHC issue and added a patch for it.

syscl

[riptidewave93]

@syscl Gave it a try, still no go. Attached is the ioreg, and a copy of my Clover folder just in case. Archive.zip

[syscl]

@riptidewave93 Please give this a try CLOVER.zip

Note also rebuild kernel cache by typing:

sudo kextcache -i /

syscl

[riptidewave93]

@syscl Gave it try, still no go. Attached is the ioctl with monitor attached. Chris’s MacBook Pro - 2.zip

[syscl]

@riptidewave93 How about plug in the monitor then reboot?

syscl

[riptidewave93]

@syscl Rebooted with monitor plugged in, still not working. Let me know if you want me to try anything else.

[syscl]

Thank you for your dedication. I will post it tomorrow morning because I need to have a rest. In USA, 3:00 am now due to the summer time TT

syscl