Comment 0 for bug 1579190

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 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.