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[Tim Passingham <tim@xxxxxxxxxxxxxxxxxxxx>]

Is there an obvious reason why users of trusty never had this problem
before, even though the fix seems to apply to many versions?

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https://bugs.launchpad.net/bugs/1579190

Title:
  Key 5 automatically pressed on some Logitech wireless keyboards

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Precise:
  Fix Committed
Status in linux source package in Trusty:
  Fix Committed
Status in linux source package in Vivid:
  Fix Committed
Status in linux source package in Wily:
  Fix Committed
Status in linux source package in Xenial:
  Fix Committed

Bug description:
  I have a K520 Logitech keyboard and sometimes something starts to keep pressing key 5.
  It mostly happens when I leave the computer alone for some time, but sometimes also just during regular usage.

  It seems that this is a Linux specific issue as no one is complaining
  about this issue under Windows, but a couple of people are complaining
  for different versions of Ubuntu.

  It is always 5 and WladyXX3740 claims on the Logitech forum that:
  "happens on Ubuntu 15.10 and 16.04, does not happen on Ubuntu 15.04, probably kernel related."

  Here is where most of the people are complaining:
  https://forums.logitech.com/t5/Keyboards-and-Keyboard-Mice/Ubuntu-15-10-and-K520-key-5-automatically-pressed-resulting-in/td-p/1488639

  I discovered that this is related to my Logitech keyboard by running this command:
  xinput test-xi2 --root

  Here is the device list:
  ⎡ Virtual core pointer                    	id=2	[master pointer  (3)]
  ⎜   ↳ Virtual core XTEST pointer              	id=4	[slave  pointer  (2)]
  ⎜   ↳ Logitech K520                           	id=10	[slave  pointer  (2)]
  ⎜   ↳ Logitech M310/M310t                     	id=11	[slave  pointer  (2)]
  ⎜   ↳ AlpsPS/2 ALPS DualPoint Stick           	id=15	[slave  pointer  (2)]
  ⎜   ↳ AlpsPS/2 ALPS DualPoint TouchPad        	id=14	[slave  pointer  (2)]
  ⎣ Virtual core keyboard                   	id=3	[master keyboard (2)]
      ↳ Virtual core XTEST keyboard             	id=5	[slave  keyboard (3)]
      ↳ Integrated_Webcam_HD                    	id=12	[slave  keyboard (3)]
      ↳ Sleep Button                            	id=9	[slave  keyboard (3)]
      ↳ Video Bus                               	id=7	[slave  keyboard (3)]
      ↳ Power Button                            	id=6	[slave  keyboard (3)]
      ↳ AT Translated Set 2 keyboard            	id=13	[slave  keyboard (3)]
      ↳ Power Button                            	id=8	[slave  keyboard (3)]
      ↳ DELL Wireless hotkeys                   	id=16	[slave  keyboard (3)]
      ↳ Dell WMI hotkeys                        	id=17	[slave  keyboard (3)]

  And some extract from the output when this happens:
  EVENT type 2 (KeyPress)
      device: 10 (10)
      detail: 14
      flags:
      root: 449.00/427.00
      event: 449.00/427.00
      buttons:
      modifiers: locked 0x10 latched 0 base 0 effective: 0x10
      group: locked 0 latched 0 base 0 effective: 0
      valuators:
      windows: root 0xf6 event 0xf6 child 0x36000f8
  EVENT type 12 (PropertyEvent)
       property: 308 'Synaptics Off'
       changed: modified
  EVENT type 2 (KeyPress)
      device: 10 (10)
      detail: 14
      flags: repeat
      root: 449.00/427.00
      event: 449.00/427.00
      buttons:
      modifiers: locked 0x10 latched 0 base 0 effective: 0x10
      group: locked 0 latched 0 base 0 effective: 0
      valuators:
      windows: root 0xf6 event 0xf6 child 0x36000f8
  EVENT type 2 (KeyPress)
      device: 10 (10)
      detail: 14
      flags: repeat
      root: 449.00/427.00
      event: 449.00/427.00
      buttons:
      modifiers: locked 0x10 latched 0 base 0 effective: 0x10
      group: locked 0 latched 0 base 0 effective: 0
      valuators:
      windows: root 0xf6 event 0xf6 child 0x36000f8
  EVENT type 2 (KeyPress)
      device: 10 (10)
      detail: 14
      flags: repeat
      root: 449.00/427.00
      event: 449.00/427.00
      buttons:
      modifiers: locked 0x10 latched 0 base 0 effective: 0x10
      group: locked 0 latched 0 base 0 effective: 0
      valuators:
      windows: root 0xf6 event 0xf6 child 0x36000f8
  EVENT type 2 (KeyPress)
      device: 10 (10)
      detail: 14
      flags: repeat
      root: 449.00/427.00
      event: 449.00/427.00
      buttons:
      modifiers: locked 0x10 latched 0 base 0 effective: 0x10
      group: locked 0 latched 0 base 0 effective: 0
      valuators:
      windows: root 0xf6 event 0xf6 child 0x36000f8
  EVENT type 2 (KeyPress)
      device: 10 (10)
      detail: 14
      flags: repeat
      root: 449.00/427.00
      event: 449.00/427.00
      buttons:
      modifiers: locked 0x10 latched 0 base 0 effective: 0x10
      group: locked 0 latched 0 base 0 effective: 0
      valuators:
      windows: root 0xf6 event 0xf6 child 0x36000f8
  ...

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-generic 4.4.0.21.22
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  viktor     2133 F.... pulseaudio
   /dev/snd/controlC0:  viktor     2133 F.... pulseaudio
  CurrentDesktop: GNOME
  Date: Fri May  6 20:45:07 2016
  HibernationDevice: RESUME=UUID=67c8171e-474f-4bdb-a2c8-22aead3fb294
  MachineType: Dell Inc. Latitude E5550
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-21-generic.efi.signed root=/dev/mapper/system_vg-root_lv ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-21-generic N/A
   linux-backports-modules-4.4.0-21-generic  N/A
   linux-firmware                            1.157
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/18/2015
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A11
  dmi.board.name: 0JPRM5
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA11:bd11/18/2015:svnDellInc.:pnLatitudeE5550:pvr:rvnDellInc.:rn0JPRM5:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E5550
  dmi.sys.vendor: Dell Inc.

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