(2020-04-26, 23:53)redkoatz Wrote: Libreelec 9.2
I can't say any better than flickering.
It's supposed to be 4k 60hz on only one hdmi port according to the raspberry pi forum. And you have to enable it. But they directed me here for how to do that in kodi
There's nothing Kodi specific about enabling 4K 60Hz output on a Pi - you edit the config.txt file in the BOOT partition just as you would on other Pi OSs.
You can either remove the uSD card and edit on a suitable text editor on a separate PC or Mac (I think Notepad++ rather than Notepad is recommended for PC editing because of a CR/LF issue?) - or SSH into your Pi running LibreElec following the guide here :
https://wiki.libreelec.tv/config.txt
You need to add the line
hdmi_enable_4kp60=1 to the config.txt file.
However there are a couple of reasons that this may also cause you some issues.
1. The Pi4B doesn't output 2160p50 or 2160p60 (aka 4K 60Hz) in a 4:2:0 format. For some UHD TVs, particularly earlier models (or cheaper models) this is the only format that they support for 2160p50/60Hz inputs - so they will stick to 30Hz. Similarly some TVs have different supported formats on different HDMI inputs. On my Sony HDMI 1 and 4 are low-bandwidth inputs and only support 2160p50/60 in 4:2:0, but HDMI 2 and 3 can have 4:2:2/4:4:4/RGB 2160p50/60 support enabled (which the Pi 4B does support)
2. The 2160p50/60Hz modes that the Pi 4B supports are 'high bandwidth' HDMI 2.0 modes - which means the HDMI cables have to carry data at a higher pixel rate - which some cheaper, older cables don't support reliably. In this case you may see frequent drop outs to black, your TV report 'unsupported format', flashes to green, lots of green or white sparkly dots etc.
Also - you should always use the Micro HDMI connector closest to the USB Type-C power port on the Pi 4B.