Settings after changing TV

Hello,
so far I’m very happy user of OSMC. Lately I’ve changed my TV. From old HDReady to new 4K unit. I thought, it’s time to get everything out from it. I wanted to enable “Adjust display refresh rate to match video”. When I do it and start a movie (1080p/24) the screen goes black, my remote stops working. I can hear the sound from movie, tho. When I turn off mentioned option in settings, everything works fine.

I have searched for my problem but I couldn’t find anything useful. I don’t know what can be a problem.

I have Pi3 hooked to Onkyo TX-SR578. The TV is LG 55C6V. I do not expect 4K output but 1080 would be nice. I think that some settings from my old TV are somewhere stored but I don’t know where to look. My config.txt looks like this:

[code]hdmi_group=1
hdmi_mode=19
gpu_mem_1024=256
hdmi_ignore_cec_init=1
disable_overscan=1
start_x=1
disable_splash=1
dtoverlay=lirc-rpi
gpu_mem_256=112
sdtv_aspect=1
dtparam=gpio_in_pin=18
sdtv_mode=2
gpu_mem_512=144
dtparam=gpio_out_pin=17
hdmi_force_hotplug=1

hdmi_ignore_cec=1
config_hdmi_boost=5
[/code]

Thanks in advance!

EDIT
I have just did some research before going out to work. I have fired up my BD player (configured to output 1080/24) and it works fine (same setup as Pi3, connected to receiver). When I have connected Pi3 directly to TV it still don’t work. Just a black screen.