I've just installed 15.10 on a new Dell Inspiron 13 7000 Series, after two catastrophic Hibernate crashes (needing OS reinstalls) on Trusty (14.04) over the last 3 days.
At this time, neither Suspend nor Hibernate work.
My /proc/acpi/wakeup has all entries disabled (except LID0, which is enabled).
Any help would be appreciated. Thanks in advance.