I also get this behaviour with my Logitech K520 keyboard and unifying receiver, on Ubuntu 16.04 and on 15.10 before that.
I'm currently running 4.4.0-22-generic #40-Ubuntu SMP Thu May 12 22:03:46 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux The same bug has been reported on the RedHat bug tracker: https://bugzilla.redhat.com/show_bug.cgi?id=1278818 According to that, the hid-logitech-hidpp driver might be the culprit. I'm interested to hear that Viktor has not yet seen the problem with the 4.6 kernel. Viktor, please keep us posted when you've run it for a bit longer! ** Bug watch added: Red Hat Bugzilla #1278818 https://bugzilla.redhat.com/show_bug.cgi?id=1278818 -- 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/1579190 Title: Key 5 automatically pressed on some Logitech wireless keyboards Status in linux package in Ubuntu: Incomplete 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1579190/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
