Brand new lenovo x1 carbon.

Today the "discover" sw update app suggest fw updates.  I went ahead with them.  Now wifi isn't working properly.  At boot, I get a hang on

Job NetworkManager-wait-online.service/start running

Then it will finish boot after some time, but only 2.4G wifi works.  It won't connect to my 5GHz wifi, although it is detected.

I tried an older kernel but got same results.

I just received this laptop yesterday, I suppose I could try to return it.  But is there maybe someway to revert the firmware updates?  Or any other ideas?

Thanks,

Neal