What have you tried, and what is the environment? For example, are you playing on a TV hooked up to a Chromecast Ultra, or are you playing on a computer via Chrome? Are you using Wi-Fi or a wired Ethernet connection?
In terms of lag, how is it manifesting? Is it that controller inputs and the visual feedback from them is way off, or that the video stream is unstable and is breaking up? These are two fairly different problems, so details are needed.
Tv screen studders for a sec to 3 secs making jumping to hard to time. The studdering will act like a fast forward. The video itself pixels and becomes really low depth. Tv Chromecast
Is your TV in game mode? I do not think that is the main issue, but it helps with how "laggy" Stadia feels in terms of your inputs instantly affecting on screen visuals. The first time I fired up Stadia and Destiny 2 it felt like crap because I did not set game mode. However, I was not seeing visual degradation and frames dropping like you are.
Aside from that, if your Chromecast Ultra is using Wi-Fi, I would try connecting an Ethernet cable to it instead and using a wired connection if possible. I realize this can be difficult depending on where your TV is versus where the nearest router/switch is, but if it is viable or if you can temporarily test in those conditions to see if it helps, it is worth doing.
I don't know anything about your wireless setup, but if there is a lot of latency and instability it does not matter how much raw speed your Internet connection has, it will still work poorly on Stadia as it requires a stable, low-latency connection as much or more than it requires a blazing fast connection. I can say that the difference between my wired experience and my wireless experience is noticeable, and I have very good wireless. Even still, I see some occasional short stutters where on wired I see basically none.
Line cable means ethernet
Same with me. Unplayable waste of time and money. I left ubisoft PC for this, because that platform was unplayable for Div 2.
@Sunbright There is a lot of thing that could be done however we need more informations. It's my understand you are playing on your TV with the Chromecast Ultra but is it connected directly to your router with a ethernet cable?
Also please run this test and let us know if you are missing packet and your jitter result: https://packetlosstest.com/
Talk to you soon.
@fretnutt If you are experiencing issues please start you own thread under the right section and we will help you find a solution. Make sure to provide has much informations has possible so we know were to start.
Lag in 95% of the case I have helped on were actually caused by the hardware or the internet connection of the users. There is more to a good connection then speed.
Take care lad you can awlays use @Northlight so I don't miss it.