

Happened to me yesterday. I have an old 4K TV, every component I used to connect to it had HDMI 2.0+ capabilities. Neither laptop nor Steam Deck would output 4K60, only 4K30. Tried getting another cable and a hub, same result. And I know that my Chromecast outputs 4K60 to this TV, so I was extra confused. In my desperation, asked GPT-5 what was I missing, and it plainly told me that those old Samsung TVs turn off HDMI 2.0 support unless you explicitly turn it on in TV settings under “UHD Color”. Apparently Chromecast was doing chroma subsampling, but computers refused and wanted full HDMI 2.0 bandwidth…
True, that totally happens to me all the time, too. For example, yesterday it was repeatedly insisting that there’s a certain checkbox in qbittorrent settings, which wasn’t there. I gave it the screenshot of the setting page and it “realized” it’s named differently. So in the end, it helped me with something that I couldn’t google properly. It’s a supplementary tool for me.