I tried to install 4.7 on a server yesterday that was running 4.3 smoothly
for over a year or so. After removing the conflicts from the network
adapters the install CD hangs when probing the parallel resp. serial
devices. I tried many combinations disabling devices, even from the BIOS. No
success. When booting from the 4.3 CD with exactly the same kernel
configuration it works out fine.