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[Bug 1540511] Re: Touchpad not working (4.3 -> 4.4 regression)

 

it bisect start
# new: [92e963f50fc74041b5e9e744c330dca48e04f08d] Linux 4.5-rc1
git bisect new 92e963f50fc74041b5e9e744c330dca48e04f08d
# old: [afd2ff9b7e1b367172f18ba7f693dfb62bdcb2dc] Linux 4.4
git bisect old afd2ff9b7e1b367172f18ba7f693dfb62bdcb2dc
# old: [1289ace5b4f70f1e68ce785735b82c7e483de863] Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
git bisect old 1289ace5b4f70f1e68ce785735b82c7e483de863
# new: [984065055e6e39f8dd812529e11922374bd39352] Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
git bisect new 984065055e6e39f8dd812529e11922374bd39352
# new: [a016af2e70bfca23f2f5de7d8708157b86ea374d] Merge tag 'sound-4.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
git bisect new a016af2e70bfca23f2f5de7d8708157b86ea374d
# new: [d45187aaf0e256d23da2f7694a7826524499aa31] Merge branch 'dmi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging
git bisect new d45187aaf0e256d23da2f7694a7826524499aa31
# new: [c2848f2eef4dd08b0fd2a8eba1694fd8e77ddb67] Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
git bisect new c2848f2eef4dd08b0fd2a8eba1694fd8e77ddb67
# old: [5339f9d4c2ceccab00b28d65bd5c2b2cd6a3de05] Merge tag 'devicetree-for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
git bisect old 5339f9d4c2ceccab00b28d65bd5c2b2cd6a3de05
# old: [63f729cb4aa9a224cfd6bb35eab6b4556c29115d] Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
git bisect old 63f729cb4aa9a224cfd6bb35eab6b4556c29115d
# old: [210c7c1750fdf769647d1d526c9ea34c412c9eee] NFS: Use wait_on_atomic_t() for unlock after readahead
git bisect old 210c7c1750fdf769647d1d526c9ea34c412c9eee

Looked through remaining commits, I'm going to try this one next, looks
promising:

commit 73e7d63efb4d774883a338997943bfa59e127085
Author: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
Date:   Tue Dec 1 12:41:38 2015 +0100

    HID: multitouch: fix input mode switching on some Elan panels

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https://bugs.launchpad.net/bugs/1540511

Title:
  Touchpad not working (4.3 -> 4.4 regression)

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  When booting the latest xenial kernel (4.4.0-2.16), my touchpad is not
  working. When booting 4.3 kernels, the touchpad is works.

  Expected: When I move a finger touching the touchpad, an arrow should move accordingly on the screen.
  What happens instead: nothing.

  I've tried an upstream 4.4 kernel; problem is present there as well.

  I've booted with pci=noaer due to another bug that would otherwise
  spam dmesg. Removing it does not fix the problem.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-2-generic 4.4.0-2.16
  ProcVersionSignature: Ubuntu 4.4.0-2.16-generic 4.4.0
  Uname: Linux 4.4.0-2-generic x86_64
  ApportVersion: 2.19.4-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  david      1759 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Mon Feb  1 18:49:25 2016
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=fe528b90-b4eb-4a20-82bd-6a03b79cfb14
  InstallationDate: Installed on 2015-11-28 (65 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20151127)
  MachineType: Dell Inc. Inspiron 13-7359
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-2-generic.efi.signed root=UUID=94d54f88-5d18-4e2b-960a-8717d6e618bb ro noprompt persistent pci=noaer quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-2-generic N/A
   linux-backports-modules-4.4.0-2-generic  N/A
   linux-firmware                           1.155
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/08/2015
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 01.02.00
  dmi.board.name: 0NT3WX
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvr01.02.00:bd09/08/2015:svnDellInc.:pnInspiron13-7359:pvr:rvnDellInc.:rn0NT3WX:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: Inspiron 13-7359
  dmi.sys.vendor: Dell Inc.

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References