First of all, I want to say thanks to all the good people that contribute to the Libreelec, I have really appreciated your work
My problem is that I'm trying to get 4K to work trough my Sony STR-DN 1040 receiver, it is connected as following PI4 -- STR-DN1040 -- Samsung UE58 MU6125. This setup gives me only 1080p, I tried to go into "settings/system/display and changed the resolution to 3840x2160p and 4096x2160p but that gives me an black screen,
If I connect the Pi4 directly to the TV it has no problem showing 4k videos, or changing the resolution on the gui to 2160p.
Coreelec on an S905W (x96 mini) has no problem displaying 4k (30hz) through my receiver, so that makes me believe this is related to either Libreelec, or the kernel that Librelec uses on Pi4 (using Libreelec 9.1.501 Kernel 4.19.66)
I have tried to 2 different micro hdmi cables, ( a third one is on is way from Ebay)
Now that if I check with:
tvservice -m DMT it gives an output of "mode 4: 640x480 @ 60Hz 4:3, clock:25MHz progressive"
tvservice -m CVT gives me an "invalide group"
Summary: All cables is 4K certified ( a third one is on its way, to rule out an old one, and and an not so trusted one (micro hdmi)
: 4K works trough receiver with an Android S905w box running Coreelec
: Yes The pi4 is connected to an 4K input on my receiver (did try BD, Video1, and Game)
: Did try with CONFIG_HDMI_B.O.O.S.T but no difference ( does it work on pi4? )
I would be thankful if someone could direct me in the right direction, or have some tips on this problem