Help Roku Ultra 2024 Dolby Atmos
Currently bought new #2024RokuUltra and having issues with Roku identifying any type of Dolby Atmos, Dolby vision, HDR content. I have LG 65CX TV playing Roku through back of TV 4K 120 Hz port and my...
Forum Discussion
Latest 4850 firmware version as of 10/15/25 is 14.0.4 build 12222 - update to this build if you haven't already.
Latest CX firmware version as of 7/11/24 is 04.50.90 - update to that version if you haven't already.
Otherwise change/verify the following settings:
4850 Settings:
1) Settings/System/Advanced System Settings/Advanced Display Settings/Dolby Vision Always on = Off
2) Settings/Display Type = Automatic (4K Dolby Vision)
3) Setting/Audio/Digital output format = Passthrough
4) During playback (any app) Options (*)/Sound Settings/Customize Sound Mode/Volume Leveling & Dialog Enhancement = Off
LG CX Settings:
1) Settings/General/External Devices/HDMI Settings/HDMI Deep Color = On/4K
2) Settings/Sound/Advanced Settings/Digital Sound Output = Pass Through
3) Settings/Sound/Advanced Settings/Select HDMI Input Audio format = Bitstream
4) Settings/Sound/Advanced Settings/eARC support = On
Otherwise try
1) A different HDMI port on the CX, or connecting the 4850 to the SB.
2) Turning everything off for a few minutes and back on, and see if that gets different results.
Just curious, how is 14.0.4 build 12222 later/newer than 14.0.4 build 12900 (which is what my 4850X upgraded to upon initial installation? That seems counterintuitive, as 12900 is clearly a larger number than 12222... Mine is showing this "upgrade" is available for download, but it sure appears to be a "downgrade". Not sure I want to take a chance "upgrading" to a lower version number...
