Using a Logitech M310 from a KM520 bundle kit.

When it stops working, I've been able to get it to work again by running
xev and holding the mousewheel down and cycling through several events.
Once it starts showing, it will fire many button presses. Once it starts
to appear, there will be a noticeable delay from button press to event.
This delay decreases, and eventually disappears. This sorts it out for a
day or so.

I was convinced it was hardware failure (possibly bad soldering points
on the middle mouse click), since it seems to respond to more pressure
on the wheel, but the regularity of failure and the fact it works after
following this protocol makes me doubt it.

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https://bugs.launchpad.net/bugs/1581088

Title:
  Middle mouse (wheel-click) button stopped working after upgrade to
  16.04

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  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?
  ---
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  toby      11625 F.... pulseaudio
   /dev/snd/controlC0:  toby      11625 F.... pulseaudio
   /dev/snd/pcmC1D0p:   toby      11625 F...m pulseaudio
   /dev/snd/controlC1:  toby      11625 F.... pulseaudio
  CurrentDesktop: GNOME
  DistroRelease: Ubuntu 16.04
  HibernationDevice: RESUME=UUID=5e3a6d2e-05f8-4d01-b80c-a9f8888200e6
  InstallationDate: Installed on 2014-04-24 (749 days ago)
  InstallationMedia: Ubuntu-GNOME 14.04 LTS "Trusty Tahr" - Release amd64 
(20140416.2)
  MachineType: LENOVO 20AL00C6GE
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-22-generic 
root=UUID=82920e97-9472-4bf4-95d3-3b07ae5eb747 ro quiet splash
  ProcVersionSignature: Ubuntu 4.4.0-22.39-generic 4.4.8
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-22-generic N/A
   linux-backports-modules-4.4.0-22-generic  N/A
   linux-firmware                            1.157
  Tags:  xenial
  Uname: Linux 4.4.0-22-generic x86_64
  UpgradeStatus: Upgraded to xenial on 2016-05-02 (9 days ago)
  UserGroups: adm lpadmin sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 03/25/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: GIET72WW (2.22 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20AL00C6GE
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0E50510 PRO
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: 
dmi:bvnLENOVO:bvrGIET72WW(2.22):bd03/25/2014:svnLENOVO:pn20AL00C6GE:pvrThinkPadX240:rvnLENOVO:rn20AL00C6GE:rvrSDK0E50510PRO:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 20AL00C6GE
  dmi.product.version: ThinkPad X240
  dmi.sys.vendor: LENOVO

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