Option Emulate3Buttons not working for my BT mouse

[Peter Hutterer]

On Fri, Jun 20, 2014 at 03:48:48PM +0200, Łukasz Maśko wrote:
> Hello.
> I've recently bought a BT mouse for my laptop. I've paired it with my 
> komputer and it works. More-less. It has only 2 physical buttons and I miss 
> the middle button, therefore I wish to use the Emulate3Buttons option. But... 
> it does not work. I've created the following config file:
> 
> Section "InputClass"
>         Identifier      "MoGo Mouse BT"
>         Driver          "evdev"
>         Option          "Buttons" "2"

This option doesn't exist in evdev, so it's ignored. Evdev gets the number
of buttons from the kernel but it's a rare 2-button mouse that actually says
it only has 2 buttons.

>         Option          "Emulate3Buttons" "on"
>         MatchProduct    "MoGo"
>         MatchIsPointer  "On"
>         MatchDevicePath "/dev/input/event*"
> EndSection
> 
> When I connect the mouse, Xorg responds like this:
> 
> [ 66808.538] (II) config/udev: Adding input device MoGo Mouse BT 
> (/dev/input/mouse3)
> [ 66808.538] (II) No input driver specified, ignoring this device.
> [ 66808.538] (II) This device may have been added with another device file.
> [ 66808.539] (II) config/udev: Adding input device MoGo Mouse BT 
> (/dev/input/event13)
> [ 66808.539] (**) MoGo Mouse BT: Applying InputClass "evdev pointer catchall"
> [ 66808.539] (**) MoGo Mouse BT: Applying InputClass "MoGo Mouse BT"
> [ 66808.539] (II) Using input driver 'evdev' for 'MoGo Mouse BT'
> [ 66808.539] (**) MoGo Mouse BT: always reports core events
> [ 66808.539] (**) evdev: MoGo Mouse BT: Device: "/dev/input/event13"
> [ 66808.539] (--) evdev: MoGo Mouse BT: Vendor 0xa5c Product 0x2004
> [ 66808.539] (--) evdev: MoGo Mouse BT: Found 3 mouse buttons
> [ 66808.539] (--) evdev: MoGo Mouse BT: Found scroll wheel(s)
> [ 66808.539] (--) evdev: MoGo Mouse BT: Found relative axes
> [ 66808.539] (--) evdev: MoGo Mouse BT: Found x and y relative axes
> [ 66808.539] (--) evdev: MoGo Mouse BT: Found absolute axes
> [ 66808.539] (--) evdev: MoGo Mouse BT: Found absolute multitouch axes
> [ 66808.539] (II) evdev: MoGo Mouse BT: Forcing absolute x/y axes to exist.
> [ 66808.539] (II) evdev: MoGo Mouse BT: Configuring as mouse
> [ 66808.540] (II) evdev: MoGo Mouse BT: Adding scrollwheel support
> [ 66808.540] (**) Option "Emulate3Buttons" "on"
> [ 66808.540] (**) evdev: MoGo Mouse BT: YAxisMapping: buttons 4 and 5

this related to scrolling and can be ignored. this talks about logical
buttons, not physical buttons.

> [ 66808.540] (**) evdev: MoGo Mouse BT: EmulateWheelButton: 4, 
> EmulateWheelInertia: 10, EmulateWheelTimeout: 200
> [ 66808.540] (**) Option "config_info" 
> "udev:/sys/devices/pci0000:00/0000:00:1d.7/usb1/1-2/1-2.4/1-2.4:1.0/bluetooth/hci0/hci0:46/0005:0A5C:2004.0024/input/input77/event13"                                                                                                                                        
> [ 66808.540] (II) XINPUT: Adding extended input device "MoGo Mouse BT" (type: 
> MOUSE, id 15)                                                               
> [ 66808.540] (II) evdev: MoGo Mouse BT: initialized for relative axes.                                                                                    
> [ 66808.540] (WW) evdev: MoGo Mouse BT: ignoring absolute axes.                                                                                           
> [ 66808.540] (**) MoGo Mouse BT: (accel) keeping acceleration scheme 1                                                                                    
> [ 66808.540] (**) MoGo Mouse BT: (accel) acceleration profile 0                                                                                           
> [ 66808.540] (**) MoGo Mouse BT: (accel) acceleration factor: 2.000                                                                                       
> [ 66808.540] (**) MoGo Mouse BT: (accel) acceleration threshold: 4
> 
> It seems to see the Emulate3Buttons option, but it seems not to obey the 
> Buttons option. The mouse has no scroll wheel, it has 2 physical buttons and 
> the 3rd one must be emulated. But... it does not work. At the sime time, it 
> works for instance for a DualPoint Stick, which I have. If it is important, I 
> also often use an external, wired mouse, which has additional 3 buttos and a 
> scroll wheel and it works correctly.
> 
> I'm using KDE 4.13.2 right now, so quirks with gsettings don't work. I have 
> libevdev 1.2.2 and xorg evdev driver 2.9.0. My xserver is 1.15.1.
> 
> Can anyone help me solve this puzzle?

Is the mb emulation set in  xinput list-props "MoGo Mouse BT"? is the
timeout too short for you? try increasing it with 
xinput set-prop "MoGo Mouse BT" "Evdev Middle Button Timeout" 100
(or whatever timeout is best) - does that fix it?
Do left/right buttons work as expected?

If the answers to the above are yes, maybe, no, yes, then please record a
left/right click on the device with evemu-record, attach it to a bug and 
assign it to me please.

Cheers,
   Peter