Comment 3 for bug 1521518

I also reproduced this issue on N4, OSK does not come up once BT mouse is connected, no matter BT keyboard is connected or not, the OSK will come up if disconnect the BT mouse, got the below output, fyi.

$ adb shell ./lsinput
/dev/input/event0
   bustype : (null)
   vendor : 0x0
   product : 0x0
   version : 0
   name : "pmic8xxx_pwrkey"
   phys : "pmic8xxx_pwrkey/input0"
   bits ev : EV_SYN EV_KEY

/dev/input/event1
   bustype : BUS_I2C
   vendor : 0x1
   product : 0x1
   version : 1
   name : "keypad_8064"
   phys : "keypad_8064/input0"
   bits ev : EV_SYN EV_KEY EV_MSC

/dev/input/event2
   bustype : (null)
   vendor : 0x0
   product : 0x0
   version : 0
   name : "touch_dev"
   bits ev : EV_SYN EV_ABS

/dev/input/event3
   bustype : (null)
   vendor : 0x0
   product : 0x0
   version : 0
   name : "apq8064-tabla-snd-card Button Ja"
   phys : "ALSA"
   bits ev : EV_SYN EV_KEY

/dev/input/event4
   bustype : (null)
   vendor : 0x0
   product : 0x0
   version : 0
   name : "apq8064-tabla-snd-card Headset J"
   phys : "ALSA"
   bits ev : EV_SYN EV_SW

/dev/input/event5
   bustype : (null)
   vendor : 0x1
   product : 0x1
   version : 1
   name : "hs_detect"
   bits ev : EV_SYN EV_KEY EV_SW

/dev/input/event6
   bustype : BUS_BLUETOOTH
   vendor : 0x46d
   product : 0xb014
   version : 4608
   name : "Bluetooth Mouse M336/M337/M535"
   phys : "e1:d1:70:f7:d6:98"
   uniq : "ae:5b:98:20:1f:00"
   bits ev : EV_SYN EV_KEY EV_REL EV_ABS EV_MSC EV_LED EV_REP