I can verify @samip537's comments -- the X553 interface won't establish link state using the default ixgbe driver included in Linux kernel 6.1 or 6.6. In my case, I'm testing hardware with X553 interfaces against a Dell PowerConnect 8132F. Qualified/Non-Qualified modules or DAC-cables make no difference. Using the OOT Intel driver, however, does work as one would expect.

Excellent; thanks @GurliGebis! I built 1.4 today and confirmed it's working as expected.

Agree with @Viacheslav and @GurliGebis comments above.

A developer I work with reports this:

After nearly 30 reinstalls the upgrade finally blew up. The issue is in the initial copying of the config file, between lines 182 and 219 in the install script. That's where it happens... what's causing it / how it happens is still unclear...

I'm encountering similar issues on upgrade as well: the configuration fails to apply because of a broken config.boot file (incomplete; stops partway through, perhaps a migration issue?)