matthias@ion:~$ cat /proc/acpi/wakeup
Device	S-state	  Status   Sysfs node
SMB0	  S4	 disabled  pci:0000:00:03.2
USB0	  S4	 disabled  pci:0000:00:04.0
USB2	  S4	 disabled  pci:0000:00:04.1
US15	  S4	 enabled   pci:0000:00:06.0
US12	  S4	 disabled  pci:0000:00:06.1
NMAC	  S5	 enabled   pci:0000:00:0a.0
PBB0	  S4	 disabled  pci:0000:00:09.0
HDAC	  S4	 disabled  pci:0000:00:08.0
XVR0	  S4	 disabled  pci:0000:00:0c.0
XVR1	  S4	 disabled
P0P5	  S4	 disabled
P0P6	  S4	 disabled  pci:0000:00:15.0
P0P7	  S4	 disabled  pci:0000:00:16.0
P0P8	  S4	 disabled  pci:0000:00:17.0
P0P9	  S4	 disabled  pci:0000:00:18.0
PWRB	  S4	*enabled