kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

** Tags removed: linux-lts
** Tags added: cherry-pick

** Changed in: linux (Ubuntu)
       Status: Confirmed => Triaged

** Changed in: linux (Ubuntu Wily)
       Status: Confirmed => Triaged

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https://bugs.launchpad.net/bugs/1534661

Title:
  regression: Cypress touchpad driver (cyapa) ignores events after bieng
  idle for 2 seconds

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Driver update in Kernel 4.2 causes severe usability issues with
  Cypress touchpad (cyapa) used on Acer C7x0 chromebooks.

  The driver in question is ignoring events during entering/leaving idle
  status what from user standpoint seems like touchpad is not reacting
  to actions performed after touchpad is not used for more then 2
  seconds.

  The bug was partially fixed in 4.3 and additional fix was pushed to
  upcoming 4.5.

  After direct communication with driver maintainer, we came up with 2 patches fixing the problem.
  Since 4.2 is EOL now, the patches cannot be pushed into upstream therefor are posted here.

  First patch is a backport of driver from 4.3 to 4.2 and the second
  patch is additional fix that should be applied on 4.3/4.4.

  Tested:
  - 4.2.0-23-generic #28~14.04.1-Ubuntu on Acer C710
  - 4.4 mainline on Acer C720p
  ---
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  eugenesan   2774 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=UUID=25e4e291-8b89-4d41-8789-da5fcd501f02
  InstallationDate: Installed on 2014-06-07 (587 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: GOOGLE Parrot
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: root=UUID=bd5d1a5d-90be-46cd-8888-6600bc0a4d4a ro ipv6.disable=1 nomdmonddf nomdmonisw
  ProcVersionSignature: Ubuntu 4.2.0-23.28~14.04.1-generic 4.2.6
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-23-generic N/A
   linux-backports-modules-4.2.0-23-generic  N/A
   linux-firmware                            1.141
  Tags:  trusty
  Uname: Linux 4.2.0-23-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom debian-tor dialout dip fax ftp lp lpadmin plugdev sambashare scanner sudo tty users vboxusers voice wireshark
  _MarkForUpload: True
  dmi.bios.date: 09/10/2012
  dmi.bios.vendor: coreboot
  dmi.bios.version: Google_Parrot.2685.37.0
  dmi.chassis.type: 3
  dmi.chassis.vendor: GOOGLE
  dmi.modalias: dmi:bvncoreboot:bvrGoogle_Parrot.2685.37.0:bd09/10/2012:svnGOOGLE:pnParrot:pvr1.0:cvnGOOGLE:ct3:cvr:
  dmi.product.name: Parrot
  dmi.product.version: 1.0
  dmi.sys.vendor: GOOGLE

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