Im having similar issue with my HS setup, dell latitute 3480, i5-7200U
Once the hdmi plugged in, the laptop display went blank, only could see the external tv
But, when i put my laptop to sleep & wake up again, both screen got display (hdmi still connected)
Even the hdmi could be plugged off & in (after sleep), the laptop display is fine
What could be the culprit?
Dell’s MacBook Pro IORegistry.zip
I’m running macOS Catalina 10.15.2 on my Lenovo Ideapad 300-15isk laptop. Everything works, except HDMI audio. I can’t get it right no matter what I try, and I’ve tried every guide I’ve found. I was able to patch AppleHDA.kext and sound is working great, but still no HDMI audio in the sound properties window, only 'internal speaker out'. Here are my specs:
Lenovo Ideapad 300-15isk 80RS Intel core i5 6200U @ 2.40 GHz Intel HD 520 Graphics 16GB of DDR3L RAM @ 1600Mhz 480GB SSD as primary boot and system drive 1TB SATAIII HD as secondary. Backup drive Dual boot (macOS Catalina 10.15.2 and Windows 10 Pro)
Please refer to attached .docx file containing a picture of DPCIManager window and picture of Kexts installed in EFI-EFI-CLOVER-Kexts-Other. Also, in case you wish to look at it, I am posting the link to my RunMe files. Thanks a lot for your time and help!
Hi again... I'm update to Catalina and my old config.plist to patch my laptop with new methods... all work fine. Only I have a little problem with may HDMI connection, when use it my laptop reboots. Please... Can anyone see my problem reporting files and tell me... Thanks in advance.
PD. I've noticed that I also have another problem, my laptop don't go to sleep.
Finally I finished the installation of 10.14.6 on my Dell E5440. Everything works just fine, but HDMI will not work. Every time I plug it in, it causes a grey screen on my laptop monitor. Also on boot up. I attached my EFI Folder, maybe someone can help me. I searched a bit and read something about Azul Framebuffer Kext.