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[Ubuntu Foundations Team Bug Bot <1195822@xxxxxxxxxxxxxxxxxx>]

** Tags added: patch

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https://bugs.launchpad.net/bugs/1195822

Title:
  MacBook Air 6,2 (mid2013) Touchpad is Non-Functional

Status in The Linux Kernel:
  Unknown
Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  The MacBook Air 6,2 models (11 and 13 inch) touchpad is basically
  broken; it does not function as a multitouch device, rather it
  provides the functionality of a basic single-click mouse.  All
  multitouch capabilities are broken (right-click, scroll, gestures,
  etc.).

  I would expect that the touchpad would function as a normal fully-
  functional touchpad, instead the touchpad functionality is limited to
  mouse-movement and left-clicking.

  The 2013 MacBook Air laptops have a new hardware touchpad device
  (05ac:0291) which is not compatible with the 'bcm5974' multitouch
  driver.  As a result, the generic 'usbhid' is being associated with
  the device (evident in /sys/bus/usb/drivers/usbhid/), which has the
  effect of the touchpad being registered as a 'Pointer' rather than a
  'Touchpad' in X.  As a result, it is assigned the generic evdev X
  mouse driver rather than the synaptics X driver.

  I have been able to 'force' the touchpad to be associated with the
  'bcm5974' kernel driver (via sysfs), however, the driver fails to
  communicate with the hardware and no mouse functionality is available.
  In this case the bcm5974 reports 'could not read from device' in
  dmesg.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.9.0-7-generic 3.9.0-7.15
  ProcVersionSignature: Ubuntu 3.9.0-7.15-generic 3.9.7
  Uname: Linux 3.9.0-7-generic x86_64
  ApportVersion: 2.10.2-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  lubuntu    2821 F.... lxpanel
  CRDA: Error: [Errno 2] No such file or directory: 'iw'
  CasperVersion: 1.334
  Date: Fri Jun 28 17:14:48 2013
  IwConfig:
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  LiveMediaBuild: Lubuntu 13.10 "Saucy Salamander" - Alpha amd64+mac (20130625.2)
  MachineType: Apple Inc. MacBookAir6,2
  MarkForUpload: True
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: file=/cdrom/preseed/username.seed boot=casper initrd=/casper/initrd.lz quiet splash --
  RelatedPackageVersions:
   linux-restricted-modules-3.9.0-7-generic N/A
   linux-backports-modules-3.9.0-7-generic  N/A
   linux-firmware                           1.109
  RfKill:
   0: hci0: Bluetooth
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  StagingDrivers: zram
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 05/24/2013
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBA61.88Z.0099.B00.1305241529
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-7DF21CB3ED6977E5
  dmi.board.vendor: Apple Inc.
  dmi.board.version: MacBookAir6,2
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-7DF21CB3ED6977E5
  dmi.modalias: dmi:bvnAppleInc.:bvrMBA61.88Z.0099.B00.1305241529:bd05/24/2013:svnAppleInc.:pnMacBookAir6,2:pvr1.0:rvnAppleInc.:rnMac-7DF21CB3ED6977E5:rvrMacBookAir6,2:cvnAppleInc.:ct10:cvrMac-7DF21CB3ED6977E5:
  dmi.product.name: MacBookAir6,2
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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