Hello All,

I have a same problem. The wireless Logitech mouse's middle button does not work but an old wired Chicony mouse's works.

"xev" shows nothing and "xmodmap -ppx" seems normal.

Please find the xinput outputs below:

$ xinput list 11
Logitech USB Receiver                           id=11   [slave  pointer  (2)]
        Reporting 10 classes:
                Class originated from: 11. 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: 11. Type: XIKeyClass
                Keycodes supported: 248
                Class originated from: 11. Type: XIValuatorClass
                Detail for Valuator 0:
                  Label: Rel X
                  Range: -1.000000 - -1.000000
                  Resolution: 1 units/m
                  Mode: relative
                Class originated from: 11. Type: XIValuatorClass
                Detail for Valuator 1:
                  Label: Rel Y
                  Range: -1.000000 - -1.000000
                  Resolution: 1 units/m
                  Mode: relative
                Class originated from: 11. Type: XIValuatorClass
                Detail for Valuator 2:
                  Label: Rel Horiz Wheel
                  Range: -1.000000 - -1.000000
                  Resolution: 1 units/m
                  Mode: relative
                Class originated from: 11. Type: XIValuatorClass
                Detail for Valuator 3:
                  Label: Rel Dial
                  Range: -1.000000 - -1.000000
                  Resolution: 1 units/m
                  Mode: relative
                Class originated from: 11. Type: XIValuatorClass
                Detail for Valuator 4:
                  Label: Rel Vert Wheel
                  Range: -1.000000 - -1.000000
                  Resolution: 1 units/m
                  Mode: relative
                Class originated from: 11. Type: XIScrollClass
                Scroll info for Valuator 2
                  type: 2 (horizontal)
                  increment: 1.000000
                  flags: 0x0
                Class originated from: 11. Type: XIScrollClass
                Scroll info for Valuator 3
                  type: 2 (horizontal)
                  increment: 1.000000
                  flags: 0x0
                Class originated from: 11. Type: XIScrollClass
                Scroll info for Valuator 4
                  type: 1 (vertical)
                  increment: -1.000000
                  flags: 0x2 ( preferred )

and the working wired one:

$ xinput list 14
USB Optical Mouse                               id=14   [slave  pointer  (2)]
        Reporting 7 classes:
                Class originated from: 14. Type: XIButtonClass
                Buttons supported: 7
                Button labels: "Button Left" "Button Middle" "Button Right" "Button Wheel Up" "Button Wheel Down" "Button Horiz Wheel Left" "Button Horiz Wheel Right"
                Button state:
                Class originated from: 14. Type: XIValuatorClass
                Detail for Valuator 0:
                  Label: Rel X
                  Range: -1.000000 - -1.000000
                  Resolution: 1 units/m
                  Mode: relative
                Class originated from: 14. Type: XIValuatorClass
                Detail for Valuator 1:
                  Label: Rel Y
                  Range: -1.000000 - -1.000000
                  Resolution: 1 units/m
                  Mode: relative
                Class originated from: 14. Type: XIValuatorClass
                Detail for Valuator 2:
                  Label: Rel Horiz Wheel
                  Range: -1.000000 - -1.000000
                  Resolution: 1 units/m
                  Mode: relative
                Class originated from: 14. Type: XIValuatorClass
                Detail for Valuator 3:
                  Label: Rel Vert Wheel
                  Range: -1.000000 - -1.000000
                  Resolution: 1 units/m
                  Mode: relative
                Class originated from: 14. Type: XIScrollClass
                Scroll info for Valuator 2
                  type: 2 (horizontal)
                  increment: 1.000000
                  flags: 0x0
                Class originated from: 14. Type: XIScrollClass
                Scroll info for Valuator 3
                  type: 1 (vertical)
                  increment: -1.000000
                  flags: 0x2 ( preferred )