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This has been the case since very early on when I updated to precise,
and I have tried with every kernel since 3.2.0-9. The trackpad works in
a diminished manner (tap to click doesn't work) in the oneiric kernels.
If I power on the machine from being powered off, and boot into the
regular precise kernel, the trackpad does not work. However, if I boot
into the 3.2.1-030201 kernel, the trackpad works. Rebooting without
powering off, into the precise kernel, also renders a working trackpad,
suggesting that the 3.2.1 drivers perhaps do something to initialize or
reset the trackpad.
This failed with the synaptics and mtrack xorg drivers, so I don't think
this is specific to the X drivers, nor is it a new symptom from the
recent X update.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-17-generic 3.2.0-17.26
ProcVersionSignature: Ubuntu 3.2.0-17.26-generic 3.2.6
Uname: Linux 3.2.0-17-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.91-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: clint 2429 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xa0600000 irq 47'
Mixer name : 'Intel CougarPoint HDMI'
Components : 'HDA:10134206,106b6200,00100302
HDA:80862805,80860101,00100000'
Controls : 29
Simple ctrls : 9
Date: Sun Feb 19 13:55:48 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MachineType: Apple Inc. MacBookAir4,1
ProcEnviron:
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-17-generic
root=UUID=8410f901-7dac-4b5b-a480-40b5a97327cf ro quiet splash
i915.i915_enable_rc6=1 vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.2.0-17-generic N/A
linux-backports-modules-3.2.0-17-generic N/A
linux-firmware 1.69
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: Upgraded to precise on 2012-01-17 (33 days ago)
dmi.bios.date: 10/14/2011
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBA41.88Z.0077.B0E.1110141154
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-C08A6BB70A942AC2
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookAir4,1
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-C08A6BB70A942AC2
dmi.modalias:
dmi:bvnAppleInc.:bvrMBA41.88Z.0077.B0E.1110141154:bd10/14/2011:svnAppleInc.:pnMacBookAir4,1:pvr1.0:rvnAppleInc.:rnMac-C08A6BB70A942AC2:rvrMacBookAir4,1:cvnAppleInc.:ct10:cvrMac-C08A6BB70A942AC2:
dmi.product.name: MacBookAir4,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.
** Affects: xorg (Ubuntu)
Importance: Medium
Status: Confirmed
** Tags: amd64 apport-bug kernel-da-key kernel-request-3.2.0-17.27 precise
staging
--
MacBookAir 4,1 trackpad does not work with evdev/multitouch driver
https://bugs.launchpad.net/bugs/936552
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