Hi,
I am trying to set the refresh rate in the libreelec settings to 60hz while the resolution is set to 3840x2160, however for some reason the max refresh rate I can select is 30hz. I have been trying to debug this for the best part of a couple of days, so I am turning to the community for help!
The TV I have is the Samsung 65" RU7100 which supports 4K at 60hz, and the cable I am using also supports 4k and is a micro HDMI to HDMI (this is the second cable I've tried and no luck with either).
I am, using the HDMI 0 port on the PI (port nearest to the power connector) and I've added hdmi_enable_4kp60=1 in config.txt.
What's wired is when I tested this on one of my monitors (the Dell U2718Q) which also supports 4k I could select 60hz, so I think the problem is specific to my TV. But I have also looked in the TV setting for an option like "Deep Colour" (I read that sometimes you have to change a TV setting to enable 60hz), but I can't find any relevant setting. The only option I found was HDMI "Input Signal Plus", but I think that is used for UHD and didn't have any effect.
These are the cables I've tried and both work with the 4k monitor (I can choose 3840x2160 and 60 Hz refresh rate), just not the TV.
Cable 1: KabelDirekt 1.5m Micro HDMI to HDMI Cable compatible: Amazon.co.uk: Electronics
Cable 2: UGREEN HDMI D HDMI A , Cable, HDMI Type D , HDMI Type: Amazon.co.uk: Electronics
Running tvservice -m CEA returns:
Group CEA has 21 modes:
mode 1: 640x480 @ 60Hz 4:3, clock:25MHz progressive
mode 2: 720x480 @ 60Hz 4:3, clock:27MHz progressive
mode 3: 720x480 @ 60Hz 16:9, clock:27MHz progressive
mode 4: 1280x720 @ 60Hz 16:9, clock:74MHz progressive
mode 5: 1920x1080 @ 60Hz 16:9, clock:74MHz interlaced
mode 7: 720x480 @ 60Hz 16:9, clock:27MHz x2 interlaced
(prefer) mode 16: 1920x1080 @ 60Hz 16:9, clock:148MHz progressive
mode 17: 720x576 @ 50Hz 4:3, clock:27MHz progressive
mode 18: 720x576 @ 50Hz 16:9, clock:27MHz progressive
mode 19: 1280x720 @ 50Hz 16:9, clock:74MHz progressive
mode 20: 1920x1080 @ 50Hz 16:9, clock:74MHz interlaced
mode 22: 720x576 @ 50Hz 16:9, clock:27MHz x2 interlaced
mode 31: 1920x1080 @ 50Hz 16:9, clock:148MHz progressive
mode 32: 1920x1080 @ 24Hz 16:9, clock:74MHz progressive
mode 33: 1920x1080 @ 25Hz 16:9, clock:74MHz progressive
mode 34: 1920x1080 @ 30Hz 16:9, clock:74MHz progressive
mode 93: 3840x2160 @ 24Hz 16:9, clock:297MHz progressive
mode 94: 3840x2160 @ 25Hz 16:9, clock:297MHz progressive
mode 95: 3840x2160 @ 30Hz 16:9, clock:297MHz progressive
mode 98: 4096x2160 @ 24Hz unknown AR, clock:297MHz progressive
mode 100: 4096x2160 @ 30Hz unknown AR, clock:297MHz progressiveAny help or advice would be greatly appriciated!
