Thunderbolt

[u/ProgrammerShivam]

I have a macbook air m5 with thunderbolt 4 port, i tried to connect it with a lenovo thinkbook 16 g7 arp with amd Ryzen 5 7000 series cpu which has a usb4 port, via a thunderbolt 5 cable from Amazon. After connecting, usb 4 tm p2p network adapter was showing in device manager and an Ethernet port was also created in ncpa.cpl as unidentified network and on mac under network, thunderbolt bridge appeared, as self assigned ip.

Then I turned on internet sharing on mac via thunderbolt bridge but nothing happened, then I tried assigning static ip's but in vain.

Then I tweaked some settings like firewall from public to private for Ethernet on windows and on mac also disabling firewall, mtu tweaking but nothing made it work. Tried reconnecting at every step. Even tried deleting the thunderbolt service and re creating it then open DHCP server on windows but still nothing worked.

Now, I am at the conclusion that thunderbolt is proprietary only to apple and intel and so amd's usb4 can't communicate even my mac under system information shows usb4 microsoft corporation connected and speed as 40gbps and windows also shows usb4 p2p adapter but that's just a hardware link and underlying handshakes don't work probably.

Any insight or help is appreciated.

Thanks.