I have a LG55C9 with firmware 04.71.05 that has a problem with screen mirroring.
Any video played from iOS or Android devices to the TV via screen mirroring stutters, sometimes the audio drops and occasionally the picture freezes. It doesn't matter if the content is stored on the device or streamed, the result is always the same; juddering, choppy video.
I've looked at other forums here:
Airplay stuttering and choppy audio
When trying to stream video via Airplay to my LG C9, the audio and video both stutter. When using Airplay with my Apple TV it's fine.
lgcommunity.us.com
They report the same issues.
extra info:
My TV is wired directly to the router with 3 meters of cat 5e. My Wifi is fine, no interference. I have a 330mbps FTTP internet connection, anything played via the inbuilt TV apps works absolutely fine.
Iv'e rebooted everything, tried numerous different iPhones from visitors, the result is the same.
My question: Has anyone managed to screen mirror video successfully to the C9?
Thanks for your help