Bug#765719: general: System restarts on "shutdown -h now"

[Moritz <moritz.tacke@gmail.com>]

Package: general
Severity: normal

Dear Maintainer,

   * What led up to the situation?
After the last upgrade, the system would not halt any more. Instead, it runs into a restart cycle. The restart bypasses GRUB, i.e. one a computer with multiple OS, it restarts linux directly.
The machine in use is a Lenovo Thinkpad X220.
   * What exactly did you do (or not do) that was effective (or
     ineffective)?
I tried some hints from users with similar experiences, including the "acpi=force" setting, the selection of a different kernel at the first start, a manual intervention (for i in /sys/bus/usb/devices/*/power/control; do echo on > $i; done) on the USB power control settings, and shutdowning in all flavors.
   * What was the outcome of this action?
Continues restarting

-- System Information:
Debian Release: jessie/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.16-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=C, LC_CTYPE=de_DE@euro (charmap=ISO-8859-15)
Shell: /bin/sh linked to /bin/dash