I finally found what cause Stadia via CCU to lag!! There's some kind of interference with CCU and my LG soundbar, which has a wireless subwoofer. I turn off the soundbar and no lag, no latency!!
What can I do? How comes the soundbar interfere with CCU?
Regards
It's not interference so much as your sound bar just adding latency with it's probably very cheap HDMI switch.
I suggest you plug the Chromecast into your TV directly band get the sound to your sound bar via ARC (audio return channel). Usually TVs only have one ARC port so make sure you identify which one that is and plug the sound bar into that one. You may have to switch to ARC in the TV settings as well.
I too have an LG soundbar with wireless sub. are you saying that you have the CCU plugged into your TV, and the SB using optical from TV? and once you just simply turned off the SB, the input lag stopped?
I find this strange since the CCU is plugged directly into the TV, but i suppose that the TV could be delaying the picture to sync to the sound, which when watching TV, wouldnt be an issue, but with games it could be. Ill try to turn off my soundbar as well tonight to see how it works in comparison.
Thanks for the tests. I have some weird issue. It’s only on wifi. So I bought a powerline and connect the CCU with an Ethernet cable
Regards