[    6.863084] wmi: Mapper loaded
...
[    8.313598] acer_wmi: Acer Laptop ACPI-WMI Extras
[    8.315141] acer_wmi: Function bitmap for Communication Button: 0x801
[    8.315391] iTCO_wdt: Intel TCO WatchDog Timer Driver v1.07
[    8.318054] Linux media interface: v0.10
[    8.320963] acer_wmi: Brightness must be controlled by generic video driver
[    8.320974] iTCO_wdt: Found a HM55 TCO device (Version=2, TCOBASE=0x0460)
[    8.321080] iTCO_wdt: initialized. heartbeat=30 sec (nowayout=0)
[    8.327597] input: Acer WMI hotkeys as /devices/virtual/input/input14
...
[  966.559929] acer_wmi: Unknown function number - 4 - 90   /* entering DPMS (main display off) */
...
[ 6149.355987] acer_wmi: Unknown function number - 4 - 90   /* exiting DPMS (main display backon) */
[ 6151.259037] acer_wmi: Unknown function number - 5 - 0    /* closing lid */
[ 6153.597345] acer_wmi: Unknown function number - 5 - 15   /* opening lid */
[ 6158.112272] acer_wmi: Unknown key number - 0x84          /* pressing the "keyboard" physical button */
[ 6158.387780] acer_wmi: Unknown function number - 2 - 132  /* releasing the "keyboard" physical button*/