I play stadia om Chrome (Ubuntu) in 2K with VP9 without any problems, so my question is: I need a monitor 4K to play in 4K resolution ????
When I try to change to 4K, I see a message "your equipment is not compatible with 4K...."
Processor: Intel® Core™ i7-8650U CPU @ 1.90GHz × 8
Graphics: NV138 / Mesa Intel® UHD Graphics 620 (KBL GT2)
My Internet connection (Ethernet):
Based on your current download speed of 110.282 Mbps, we expect that you’ll have a high-performance gaming experience on Stadia
Thanks
You could try to install the unofficial Stadia+ extension to force the resolution.
The requirements can be found HERE.