Roku Remote Volume Controls Not Working via CEC. Vizio M Series TV
I just got a new Vizio M Series TV (MG507-G1) connected to a Roku Premiere+ (4630x) in the ARC HDMI port. The TV will power on and switch channels when any button is used on the Roku Remote (RC-GR3) but not the volume controls. I have CEC enabled on the TV and it shows up in the CEC menu. I have one touch enabled on the Roku. I have done a factory reset on the TV but not on the Roku yet. I have checked for updates on both.
Re: Roku Remote Volume Controls Not Working via CEC. Vizio M Series TV
That roku remote wasn't able to control tv's initially until the roku received an update. Then it wouldn't work with many brands of tv. The volume keys were originally only for the headphone jack. You might want to upgrade to the voice wifi remote with tv controls. It will control the tv by IR instead of relying on hdmi-cec.