Updated to CentOS 7.4

No wifi. The wifi was using wl-something driver that had third party firmware but it wasn't seen.

Attempted to get network with ethernet from the mobo to router but it wouldn't come up.

So I rebuilt the wl-whatever kernel module and installed the updated version built against the newer kernel.

Now when attempting to boot it gets stuck at "i8042 no controller found" and stops.

That message is always there, either lack of serial port or lack of PS/2 ports - I forget - but the boot now hangs there.

It's caused by the wl-whatever kmod update I tried trying to get network back, but I can't remove that rpm if I can't boot.

Help.