I have the same issue. It seems to happen within 10~15 minutes of resuming from sleep. I am running Fedora, and there is nothing that indicates why this is happening in journal or dmesg. Just a complete lock.
Just to confirm - the replacement card also caused lockups. We’ve taken it out and have never once experienced a lock ever since. Maybe co-incidence, but I’m not about to try again.
I had the same issue with total freeze ups with Win11 on 12 gen, but I am not using a DP card. I just started using the mainboard as a desktop with a Dell DA305 adapter for IO. The freezes stopped after I switched to a different hub.
AMD Ryzen under Win11 here
Just launching Task Manager (Ctrl-Alt-Del) unfreezes; obviously doesn’t work if the freeze is during boot (have to hold down power button to do a hard stop)
Reviving a dead thread just to add one more datapoint. Windows 11, intel 12th gen, fully updated drivers and bios. Laptop completely locks up if I have the DP card in. Took it out and it seems fine so far. Checked the receipts and I bought the card in 2022 so maybe it was a bad batch. Never had to use DisplayPort until recently so never put it in until now