Comment # 12 on bug 1084811 from Attila Schler

tlp !!!

It seems that this issue is the side-effect of tlp. I just uninstalled it and
e-sata hotplugging started working again.

(This tlp and the like stuff should never be automatically installed on user
systems without the most explicit and detailed info on what it will do by
default, and without explicit consent from the user.)