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** Changed in: gpm (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1884536

Title:
  Multiple-monitor Set Up Makes Mouse-pointer Jump About in 20.04

Status in gpm package in Ubuntu:
  Incomplete

Bug description:
  I have relatively recently loaded Ubuntu 20.04 to dual-boot on a
  Packard Bell with Windows 10 Home 64-bit already installed. The mouse-
  pointer moves and clicks perfectly when the PC has a single-monitor.
  However, for work as a developer, I should like to use a dual-monitor
  setup.

  The problem I have is, if I plug in to the PC tower a second monitor
  and follow the steps to Connect Another Monitor To My Computer
  (https://help.ubuntu.com/stable/ubuntu-help/display-dual-
  monitors.html), and after I confirm "join Display", the mouse-pointer
  jumps about and a second stationary mouse-pointer appears in the
  bottom right of my primary screen. This behaviour stops immediately I
  confirm "Single Display", but now the second screen is now turned
  blank.

  $ xinput
  ⎡ Virtual core pointer                      id=2    [master pointer  (3)]
  ⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
  ⎜   ↳ USB Wired Keyboard Consumer Control       id=12   [slave  pointer  (2)]
  ⎜   ↳ PixArt USB Optical Mouse                  id=13   [slave  pointer  (2)]
  ⎣ Virtual core keyboard                     id=3    [master keyboard (2)]
      ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
      ↳ Power Button                              id=6    [slave  keyboard (3)]
      ↳ Video Bus                                 id=7    [slave  keyboard (3)]
      ↳ Power Button                              id=8    [slave  keyboard (3)]
      ↳ Sleep Button                              id=9    [slave  keyboard (3)]
      ↳ USB Wired Keyboard                        id=10   [slave  keyboard (3)]
      ↳ USB Wired Keyboard System Control         id=11   [slave  keyboard (3)]
      ↳ USB Wired Keyboard Consumer Control       id=14   [slave  keyboard (3)]

  $ sudo dmidecode -t 1
  # dmidecode 3.2
  Getting SMBIOS data from sysfs.
  SMBIOS 2.8 present.

  Handle 0x0001, DMI type 1, 27 bytes
  System Information
      Manufacturer: Packard Bell
      Product Name: iMedia S2984
      Version:         
      Serial Number: DTU96EK00360103D0F3000
      UUID: 84edd4a2-b457-11e5-9b1f-98eecb2ca5dd
      Wake-up Type: Power Switch
      SKU Number:  
      Family: Packard Bell Desktop

  $ lsb_release -a; uname -a; lsusb
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu 20.04 LTS
  Release:    20.04
  Codename:   focal
  Linux charlesb2t-iMedia-S2984 5.4.0-37-generic #41-Ubuntu SMP Wed Jun 3 
18:57:02 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
  Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
  Bus 001 Device 004: ID 0bda:0153 Realtek Semiconductor Corp. 3-in-1 
(SD/SDHC/SDXC) Card Reader
  Bus 001 Device 003: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse
  Bus 001 Device 002: ID 0461:4e6f Primax Electronics, Ltd Acer Wired Keyboard 
Model KBAY211
  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

  I am reporting this as a bug because I am unable to fix it and I have
  asked around, but no joy. I do need a dual-monitor set p for work.
  Currently, I can use Windows10 with dual-monitors, on the same
  machine, without a glitch.

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