Dear all, I am so glad I can post a solution (or at least workaround)
for this.
Instead of downgrading from 304.132 to the previous version 304.131,
I've followed the suggestion on
http://askubuntu.com/questions/845632/nvidia-304-132-driver-update-wont-
boot and checked which nVidia driver version
Dear Jean, could you please describe how to successfully __downgrade__
driver from 304.132 to the previous version 304.131.
I've tried everything I could find on the web, at no avail. For example,
directly running the NVIDIA-*.run file didn't succeed as some remnants
of nouveau driver were present