<snip>

I think, on my test machine, by default, there are many modules which
get added during boot up, which with vanilla kernel is not happening.
Thanks for your input.

Regards,

~Praveen.

What does lsmod show you in the vanilla kernel ? If you want the same modules to load in the vanilla

kernel folow steps given below:

1 -boot into the older 4.4.162-78-defaultkernel

2 - change into the vanilla kernel source 4.20.0-rc6 builddirectory

3 - $ lsmod > lsmod.txt

4 - $ make LSMOD="lsmod.txt" localmodconfig

Boot into your newly compiled vanilla kernel and run lsmod and smile :-)

Hope this helps - Aruna