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[Bug 1586552] [NEW] trackpad on MacBook not working with 4.4.0-22 update

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: koadman <1586552@xxxxxxxxxxxxxxxxxx>
Date: Fri, 27 May 2016 22:46:54 -0000
Reply-to: Bug 1586552 <1586552@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

Public bug reported:

After updating the kernel to 4.4.0-22 the trackpad on my MacBook Air no longer works.
It looks like the usbmouse driver loads first and associates with the touchpad, and this prevents the bcm5974 module from acquiring the hardware.
I was able to resolve the problem by manually unloading the usbmouse module, then reloading bcm5974:

modprobe -r usbmouse
modprobe -r bcm5974
modprobe bcm5974

This is on 16.04 LTS, fully updated.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-base 4.0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: Unity
Date: Sat May 28 08:19:30 2016
Dependencies:
 
InstallationDate: Installed on 2016-05-09 (18 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
PackageArchitecture: all
SourcePackage: linux-base
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: linux-base (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

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https://bugs.launchpad.net/bugs/1586552

Title:
  trackpad on MacBook not working with 4.4.0-22 update

Status in linux-base package in Ubuntu:
  New

Bug description:
  After updating the kernel to 4.4.0-22 the trackpad on my MacBook Air no longer works.
  It looks like the usbmouse driver loads first and associates with the touchpad, and this prevents the bcm5974 module from acquiring the hardware.
  I was able to resolve the problem by manually unloading the usbmouse module, then reloading bcm5974:

  modprobe -r usbmouse
  modprobe -r bcm5974
  modprobe bcm5974

  This is on 16.04 LTS, fully updated.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-base 4.0ubuntu1
  ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
  Uname: Linux 4.4.0-22-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sat May 28 08:19:30 2016
  Dependencies:
   
  InstallationDate: Installed on 2016-05-09 (18 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  PackageArchitecture: all
  SourcePackage: linux-base
  UpgradeStatus: No upgrade log present (probably fresh install)

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