[nemo@Sailfish ~]$ evdev_trace
----====( /dev/input/event0 )====----
Name: "sensorprocessor"
ID: bus 0x0, vendor, 0x0, product 0x0, version 0x0
Type 0x00 (EV_SYN)
Type 0x01 (EV_KEY)
         KEY_POWER KEY_CAMERA
Type 0x05 (EV_SW)
         SW_LID

----====( /dev/input/event1 )====----
Name: "synaptics_dsx_i2c"
ID: bus 0x18, vendor, 0x0, product 0x0, version 0x0
Type 0x00 (EV_SYN)
Type 0x03 (EV_ABS)
         ABS_MT_SLOT=0 [0,9] ABS_MT_TOUCH_MAJOR=0 [0,255] ABS_MT_POSITION_X=0 [0,1439] ABS_MT_POSITION_Y=0 [0,2559] ABS_MT_TRACKING_ID=0 [0,65535] ABS_MT_PRESSURE=0 [0,255]

----====( /dev/input/event2 )====----
Name: "qpnp_pon"
ID: bus 0x0, vendor, 0x0, product 0x0, version 0x0
Type 0x00 (EV_SYN)
Type 0x01 (EV_KEY)
         KEY_VOLUMEDOWN KEY_POWER

----====( /dev/input/event3 )====----
Name: "msm8994-florida-snd-card Button Jack"
ID: bus 0x0, vendor, 0x0, product 0x0, version 0x0
Type 0x00 (EV_SYN)
Type 0x01 (EV_KEY)
         KEY_VOLUMEDOWN KEY_VOLUMEUP KEY_MEDIA BTN_1 BTN_2 BTN_3 BTN_7 KEY_VOICECOMMAND

----====( /dev/input/event4 )====----
Name: "msm8994-florida-snd-card Headset Jack"
ID: bus 0x0, vendor, 0x0, product 0x0, version 0x0
Type 0x00 (EV_SYN)
Type 0x05 (EV_SW)
         SW_HEADPHONE_INSERT SW_MICROPHONE_INSERT SW_LINEOUT_INSERT SW_UNSUPPORT_INSERT

----====( /dev/input/event5 )====----
Name: "gpio-keys"
ID: bus 0x19, vendor, 0x1, product 0x1, version 0x100
Type 0x00 (EV_SYN)
Type 0x01 (EV_KEY)
         KEY_VOLUMEUP

[nemo@Sailfish ~]$ evdev_trace -t 3
^C
[nemo@Sailfish ~]$ evdev_trace -t 5
/dev/input/event5: 21130.171 - 0x01/EV_KEY - 0x073/KEY_VOLUMEUP - 1
/dev/input/event5: 21130.171 - 0x00/EV_SYN - 0x000/SYN_REPORT - 0
/dev/input/event5: 21130.345 - 0x01/EV_KEY - 0x073/KEY_VOLUMEUP - 0
/dev/input/event5: 21130.345 - 0x00/EV_SYN - 0x000/SYN_REPORT - 0
/dev/input/event5: 21133.334 - 0x01/EV_KEY - 0x073/KEY_VOLUMEUP - 1
/dev/input/event5: 21133.334 - 0x00/EV_SYN - 0x000/SYN_REPORT - 0
/dev/input/event5: 21133.681 - 0x01/EV_KEY - 0x073/KEY_VOLUMEUP - 0
/dev/input/event5: 21133.681 - 0x00/EV_SYN - 0x000/SYN_REPORT - 0
^C
[nemo@Sailfish ~]$ evdev_trace -t 2
/dev/input/event2: 21147.974 - 0x01/EV_KEY - 0x072/KEY_VOLUMEDOWN - 1
/dev/input/event2: 21147.974 - 0x00/EV_SYN - 0x000/SYN_REPORT - 0
/dev/input/event2: 21148.197 - 0x01/EV_KEY - 0x072/KEY_VOLUMEDOWN - 0
/dev/input/event2: 21148.197 - 0x00/EV_SYN - 0x000/SYN_REPORT - 0
/dev/input/event2: 21148.773 - 0x01/EV_KEY - 0x072/KEY_VOLUMEDOWN - 1
/dev/input/event2: 21148.773 - 0x00/EV_SYN - 0x000/SYN_REPORT - 0
/dev/input/event2: 21148.904 - 0x01/EV_KEY - 0x072/KEY_VOLUMEDOWN - 0
/dev/input/event2: 21148.904 - 0x00/EV_SYN - 0x000/SYN_REPORT - 0