Touchpad tap-event support broken since kernel 3.19.0-25

[Samuli Kauranne]

Release: Ubuntu 15.04
Hardware: Logitech TK820 wireless keyboard with touchpad

I've been using the said hardware with ubuntu in all releases since 13.10 without problems. All touchpad features were working fine until I received in 15.04 the automatic update to kernel version 3.19.0-22. This kernel introduced a condition in which, at times, the system started randomly registering keyboard input when pointing with the touchpad.

The original bug got apparently fixed in kernel version 3.19.0-25, but as a result this kernel version broke completely all tap-events for my touchpad. They are not registering at all. Pointing and scrolling work, so do the mechanical click-switches in the corners, but tapping or sweeping with one or more fingers does not get registered even though the settings were never touched. I now got kernel update to 3.19.0-26, but the bug persists in this version, too.

At the moment I had to revert back to kernel version 3.19.0-16 in order to be able to use my touchpad normally.
---
ApportVersion: 2.17.2-0ubuntu1.4
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: samuli 1172 F.... pulseaudio
 /dev/snd/controlC1: samuli 1172 F.... pulseaudio
CurrentDesktop: X-Cinnamon
DistroRelease: Ubuntu 15.04
HibernationDevice: RESUME=UUID=caec55c5-801b-4ddb-81bf-ab7d116a7c9e
InstallationDate: Installed on 2014-06-24 (449 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
IwConfig:
 eth1 no wireless extensions.

 lo no wireless extensions.
MachineType: ASUS All Series
Package: linux (not installed)
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-25-generic root=UUID=3f007092-6b41-4366-b197-b265d0225a0e ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.19.0-25.26-generic 3.19.8-ckt2
RelatedPackageVersions:
 linux-restricted-modules-3.19.0-25-generic N/A
 linux-backports-modules-3.19.0-25-generic N/A
 linux-firmware 1.143.3
RfKill:

Tags: vivid
Uname: Linux 3.19.0-25-generic x86_64
UpgradeStatus: Upgraded to vivid on 2015-04-24 (145 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare samuli2 sudo
_MarkForUpload: True
dmi.bios.date: 05/16/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0506
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: MAXIMUS VII GENE
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0506:bd05/16/2014:svnASUS:pnAllSeries:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnMAXIMUSVIIGENE:rvrRev1.xx:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: All Series
dmi.product.version: System Version
dmi.sys.vendor: ASUS

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1487334

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.2 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.2-rc8-unstable/

[Samuli Kauranne (samuli-kauranne)]

Hi Joseph,

I just installed and booted with the upstream kernel and it seems that most tap events work normally again. With one, two and three fingers I encounter no problems. Four-finger swipe up and down apparently sometimes does nothing, sometimes produces keyboard input if the active window is able to receive typing. Four-finger swipe left and right seems to work as it should.

[Samuli Kauranne (samuli-kauranne)]

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[Samuli Kauranne (samuli-kauranne)]

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[Samuli Kauranne (samuli-kauranne)]

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[Samuli Kauranne (samuli-kauranne)]

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[Samuli Kauranne (samuli-kauranne)]

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[Samuli Kauranne (samuli-kauranne)]

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[Samuli Kauranne (samuli-kauranne)]

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[Samuli Kauranne (samuli-kauranne)]

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[Samuli Kauranne (samuli-kauranne)]

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[Samuli Kauranne (samuli-kauranne)]

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[Samuli Kauranne (samuli-kauranne)]

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[Samuli Kauranne (samuli-kauranne)]

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[Samuli Kauranne (samuli-kauranne)]

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[Samuli Kauranne (samuli-kauranne)]

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[penalvch (penalvch)]

Samuli Kauranne, as per http://www.asus.com/Motherboards/MAXIMUS_VII_GENE/HelpDesk_Download/ an update to your computer's buggy and outdated BIOS is available (2801). If you update to this following https://help.ubuntu.com/community/BIOSUpdate does it change anything?

If it doesn't, could you please both specify what happened, and provide the output of the following terminal command:
sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date

For more on BIOS updates and linux, please see https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette .

Please note your current BIOS is already in the Bug Description, so posting this on the old BIOS would not be helpful. As well, you don't have to create a new bug report.

Once the BIOS is updated, and the information above is provided, then please mark this report Status Confirmed.

Thank you for your understanding.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]