F37 4K@30Hz and strange unknown display

I use a 55" TV as display. fedora 37 and nvidia driver from rpm fusion repo. A DP->HDMI cable.

Same hardware, windows 11 show at 4K@60Hz, but wayland and x11 all show 4K@30Hz. I had changed different DP port to test.

In setting/display interface, I got two display devices. The first device has max 30Hz refresh rate, the second one has a fixed 60 Hz. If I select the second “unknown” device as primary, it still show on first device but the panel and dock disappeared.

How can I detect this issues?

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