It sounds like you have a peripheral that's generating unwanted mouse
wheel events. If the problem is still happening then please run 'xev' in
a Terminal window and move the mouse pointer over the little white
window. Now do you see new events being logged in the Terminal window?

** Package changed: gnome-shell (Ubuntu) => linux (Ubuntu)

** Also affects: libinput (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: mutter (Ubuntu)
   Importance: Undecided
       Status: New

** Summary changed:

- chrome and gnome-terminal tabs moves to the last by itself
+ Phantom mouse wheel events without user input

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1905287

Title:
  Phantom mouse wheel events without user input

Status in libinput package in Ubuntu:
  New
Status in linux package in Ubuntu:
  New
Status in mutter package in Ubuntu:
  New

Bug description:
  This doesn't occur with Firefox. But it occurs with Chrome AND gnome-
  terminal.

  What happens is that if I have more than one tab in focus, it moves to
  the last tabs by itself.

  
  Here is a screen capture of what happens.

  I am running ubuntu 18.04.5 LTS, i have never had this issue before.
  Issue started happening since yesterday.

  This morning I applied my updates hoping that this will fix it, but
  even then nothing happened.

  I have known this to happen in another older laptop running an older
  version of ubuntu as well.

  journalctl -f gives me ths following:

  ```
  Nov 23 15:28:36 xxxmymachinenamexxx gnome-shell[4051]: pushModal: invocation 
of begin_modal failed

  ```

  Note that this error entry from the journalctl does not always appear
  when the tabs cycle through like in the video, might be unrelated.


  
  My graphics card is:

  lspci |grep VGA

  ```
  00:02.0 VGA compatible controller: Intel Corporation HD Graphics 530 (rev 06)

  ```

  
  I thought initially it might be some key that is being pressed, so i ran 
screenkey when this happens, there was no key appearing, so it does not seem 
that this is a key being pressed.

  
  I tail -f /var/log/syslog and /var/log/Xorg.0.log when i click on the tabs 
and it does this weirdness, nothing happens. So i don't have much information 
to give on this issue. Please get in touch with me if you want any information. 
I cannot push all my logs since it is a professional laptop.

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