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 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1521518 Title: OSK doesn't come up in login screen if mouse connected on nexus 7 To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-pocket-desktop/+bug/1521518/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs