Similar but sort of reverse question. I used to be able to switch from Xfinity to Roku using the Roku remote Home button. That no longer works, so I use the remote from my Samsung TV to change the Source. Why did the Home button stop working for that? Thank you!
Verify that both your TV CEC is enabled, and that Roku's 1-touch play CEC feature is enabled. (Settings/System/Control other Devices/1-touch play [enable] )
Thank you AvsGunnar for responding. I've verified both but no change.
Anything special about your setup? What is your Roku device model number (Settings/System/About) and model of the Samsung TV?
The 1-touch play is Roku's CEC feature for handling this process (automatically powers/wakes device and switches to the HDMI port). Since it basically a HDMI CEC feature, need to first look at everything HDMI related. (CEC settings are enabled, HDMI cables, and HDMI ports).
Simple things to do first since you checked your CEC settings is to try using a different HDMI port and/or cable. With some TVs, the HDMI settings are universal and affects all HDMI ports while others are port specific so may need to verify if this is applicable to you. Since you are using Samsung, just double check that all CEC and/or AnyNet+ settings are enabled. (Alternatively, you can try performing a Reset of the Samsung TV and then set it up again and see if that makes any difference.)
Final thing to try is to see if there is a conflict with the Xfinity cable box and the Roku 1-touch play. Try disabling the Xfinity's HDMI ability to switch inputs. Then see if the Roku feature works. I remember Xfinity changing the ability to use some HDMI splitters (due to HDCP) through an update to their CEC settings a couple years back, so a settings conflict should be looked at. Some users have had conflicts with Roku 1-touch play unintentionally controlling their cable boxes (not specifically Xfinity), so certainly a possibility.
Having cec enabled is different from having the tv recognize the devices as cec devices. A device like the Roku could receive an upgraded software, making it no longer recognized as a cec device. Some tv's allow you to refresh the cec devices connected to it, others you simply unplug and plug the power back in.
