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[Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>]

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

** Changed in: hwe-next
     Assignee: Kai-Heng Feng (kaihengfeng) => (unassigned)

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https://bugs.launchpad.net/bugs/1732056

Title:
  Touchpad stops working after a few seconds in Lenovo ideapad 320

Status in HWE Next:
  Triaged
Status in linux package in Ubuntu:
  Fix Released
Status in linux-oem package in Ubuntu:
  Invalid
Status in linux source package in Xenial:
  Invalid
Status in linux-oem source package in Xenial:
  Fix Released
Status in linux source package in Artful:
  Fix Committed
Status in linux-oem source package in Artful:
  Invalid

Bug description:
  === SRU Justifications ===

  [Impact]
  Touchpad freezes after a brief usage.

  [Fix]
  Quote from the commit log:
  "The stale cached value written at the final stage undoes the masking.
  Fix this by re-reading the register before clearing the interrupt.

  I also spotted that the interrupt-clearing code can race against
  amd_gpio_irq_mask() / amd_gpio_irq_unmask(), so add locking there.
  Presumably this race was leading to the loss of interrupts."

  [Test Case]
  Touchpad no longer freezes on ideapad 320-15ABR, a new Dell Latitude and
  a new Dell Inspiron.

  [Regression Potential]
  Low. It limits to AMD laptops

  === Original Bug Report ===

  I have installed ubuntu bionic on a Lenovo ideapad 320. The touchpad
  stops working a few seconds after I log in.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: linux-image-4.13.0-16-generic 4.13.0-16.19
  ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
  Uname: Linux 4.13.0-16-generic x86_64
  ApportVersion: 2.20.7-0ubuntu4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  rebeca     1440 F.... pulseaudio
   /dev/snd/controlC0:  rebeca     1440 F.... pulseaudio
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Nov 13 20:03:41 2017
  InstallationDate: Installed on 2017-09-22 (53 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170918)
  MachineType: LENOVO 80XS
  ProcFB: 0 amdgpudrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-16-generic.efi.signed root=UUID=1e55f665-bd98-4113-9ae8-ec766bfc424f ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.13.0-16-generic N/A
   linux-backports-modules-4.13.0-16-generic  N/A
   linux-firmware                             1.169
  SourcePackage: linux
  UpgradeStatus: Upgraded to bionic on 2017-11-14 (0 days ago)
  dmi.bios.date: 05/22/2017
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 5QCN16WW
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: LNVNB161216
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0J40700WIN
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo ideapad 320-15ABR
  dmi.modalias: dmi:bvnLENOVO:bvr5QCN16WW:bd05/22/2017:svnLENOVO:pn80XS:pvrLenovoideapad320-15ABR:rvnLENOVO:rnLNVNB161216:rvrSDK0J40700WIN:cvnLENOVO:ct10:cvrLenovoideapad320-15ABR:
  dmi.product.family: ideapad 320-15ABR
  dmi.product.name: 80XS
  dmi.product.version: Lenovo ideapad 320-15ABR
  dmi.sys.vendor: LENOVO

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