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[Launchpad Bug Tracker <1581088@xxxxxxxxxxxxxxxxxx>]

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Since upgrading to 16.04 clicking the middle mouse button (scroll wheel)
on my Logitech M185 stopped working.

xev does not even show the event for clicking the wheel, while it shows
other button clicks and scroll wheel up/down events.

xinput list shows the USB receiver 2 times:

⎡ Virtual core pointer                    	id=2	[master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer              	id=4	[slave  pointer  (2)]
⎜   ↳ Logitech USB Receiver                   	id=9	[slave  pointer  (2)]
⎜   ↳ Logitech USB Receiver                   	id=10	[slave  pointer  (2)]
⎜   ↳ HID 046a:0023                           	id=13	[slave  pointer  (2)]
⎜   ↳ SynPS/2 Synaptics TouchPad              	id=16	[slave  pointer  (2)]
⎜   ↳ TPPS/2 IBM TrackPoint                   	id=17	[slave  pointer  (2)]

Listing the capabilities looks like this:

$ xinput list 9
Logitech USB Receiver                   	id=9	[slave  pointer  (2)]
	Reporting 7 classes:
		Class originated from: 9. Type: XIButtonClass
		Buttons supported: 24
		Button labels: "Button Left" "Button Middle" "Button Right" "Button Wheel Up" "Button Wheel Down" "Button Horiz Wheel Left" "Button Horiz Wheel Right" "Button Side" "Button Extra" "Button Forward" "Button Back" "Button Task" "Button Unknown" "Button Unknown" "Button Unknown" "Button Unknown" "Button Unknown" "Button Unknown" "Button Unknown" "Button Unknown" "Button Unknown" "Button Unknown" "Button Unknown" "Button Unknown"
		Button state:
		Class originated from: 9. Type: XIValuatorClass
		Detail for Valuator 0:
		  Label: Rel X
		  Range: -1.000000 - -1.000000
		  Resolution: 1 units/m
		  Mode: relative
		Class originated from: 9. Type: XIValuatorClass
		Detail for Valuator 1:
		  Label: Rel Y
		  Range: -1.000000 - -1.000000
		  Resolution: 1 units/m
		  Mode: relative
		Class originated from: 9. Type: XIValuatorClass
		Detail for Valuator 2:
		  Label: Rel Horiz Wheel
		  Range: -1.000000 - -1.000000
		  Resolution: 1 units/m
		  Mode: relative
		Class originated from: 9. Type: XIValuatorClass
		Detail for Valuator 3:
		  Label: Rel Vert Wheel
		  Range: -1.000000 - -1.000000
		  Resolution: 1 units/m
		  Mode: relative
		Class originated from: 9. Type: XIScrollClass
		Scroll info for Valuator 2
		  type: 2 (horizontal)
		  increment: 1.000000
		  flags: 0x0
		Class originated from: 9. Type: XIScrollClass
		Scroll info for Valuator 3
		  type: 1 (vertical)
		  increment: -1.000000
		  flags: 0x2 ( preferred )

$ xinput list 10
Logitech USB Receiver                   	id=10	[slave  pointer  (2)]
	Reporting 6 classes:
		Class originated from: 10. Type: XIButtonClass
		Buttons supported: 7
		Button labels: "Button 0" "Button Unknown" "Button Unknown" "Button Wheel Up" "Button Wheel Down" "Button Horiz Wheel Left" "Button Horiz Wheel Right"
		Button state:
		Class originated from: 10. Type: XIKeyClass
		Keycodes supported: 248
		Class originated from: 10. Type: XIValuatorClass
		Detail for Valuator 0:
		  Label: Rel X
		  Range: -1.000000 - -1.000000
		  Resolution: 1 units/m
		  Mode: relative
		Class originated from: 10. Type: XIValuatorClass
		Detail for Valuator 1:
		  Label: Rel Y
		  Range: -1.000000 - -1.000000
		  Resolution: 1 units/m
		  Mode: relative
		Class originated from: 10. Type: XIValuatorClass
		Detail for Valuator 2:
		  Label: Rel Horiz Wheel
		  Range: -1.000000 - -1.000000
		  Resolution: 1 units/m
		  Mode: relative
		Class originated from: 10. Type: XIScrollClass
		Scroll info for Valuator 2
		  type: 2 (horizontal)
		  increment: 1.000000
		  flags: 0x0

Does anyone have an idea how I can attempt to further debug that issue?
Or maybe even a solution? Should I consider this issue a bug? Can I
provide more info?

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: bot-comment
-- 
Middle mouse (wheel-click) button stopped working after upgrade to 16.04
https://bugs.launchpad.net/bugs/1581088
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