OSMC Kodi 19 Ultra Wide Support

I recently updated to the new osmc version, but this broke the configuration for my ultrawide screen (2560x1080) on my Raspberry Pi 3B+.

With the old version I could simply update the /boot/config.txt/ file by adding:

hdmi_drive=2
hdmi_aspect_21_9=7
hdmi_pixel_freq_limit=400000000
hdmi_cvt=2560 1080 60 7 0 0 1
#config_hdmi_boost=4
max_framebuffer_width=2560
max_framebuffer_height=1080
framebuffer_width=2560
framebuffer_height=1080
gpu_mem_1024=256  
disable_overscan=1
start_x=1  
disable_splash=1
gpu_mem_256=112  
gpu_mem_512=144  

But now this does not seem to work anymore with the new version. I’ve tried both updating the config-user.txt and the regular config.txt file, but both seem to do nothing.

Is there something else I’m missing that I need to change? Help would be greatly appreciated.

Mode setting on RPi is now altogether more mysterious. I suggest a poke around the RPi forum.