Usb c to multiport hub hdmi port not showing display to tv

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I have bought a usb c to multiport hdmi hub all the other ports work but the hdmi port when I plug it to upper two usb c port to that hub and connect the hdmi port the tv shows no signal I am on ubuntu 24.10 with fw13 amd 7840u
this is the hub i bought : USB C Hub with Ethernet Adapter, 8 In 1 USB C Multiport Adapter with 100W PD, 4K HDMI, USB 3.0/2.0, Type C Port, SD/TF Card Reader, USB C Adapter for iPhone 16/15, MacBook, iPad, Samsung, Surface, etc: Amazon.co.uk: Computers & Accessories

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I’ve tried a bunch of those things. Some work, some have issues. This one works for me: https://www.amazon.nl/dp/B0BXDQS4BD?ref_=pe_28126711_487767311_302_E_DDE_dt_1

Some didn’t do 1440p. Some only worked on only 1 HDMI port. (I’m using 2).

Probably not that helpful but maybe if some more people chime in we might found out what’s going on.

EDIT: Found this: USB-C/Thunderbolt Dock Megathread

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Thanks for the info

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Update the issue is resolved and the hub works very well with the laptop

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Can you explain how you fixed it so people having the same problem know how to fix it?

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yeah sure the problem was not actually the hub, laptop or os because when I tried the same hub on different monitors and tv it worked as usual. The first tv I tried it on just before writing this post turns out to had hdmi problem in the tv itself because it wasn’t picking hdmi signal from any laptop.

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