It's not really a separate touchpad, it's a /dev/input/mouseX device registered by the mousedev driver for the same touchpad, kind of a legacy mouse device for applications that need that sort of thing. It's there in the good and bad case, and X seems to be (correctly) ignoring it.
I think you may be onto something with the keyboard remove being related. I don't know what's going on, and I don't see it on my MBA 4,1, but dmesg does show usbhid devices disappearing and reappearing about 18 seconds after boot. Actually it looks like the usbhid module is unloaded and reloaded. If I rmmod then insmod usbhid on my machine my touchpad stops working until I restart X. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to lightdm in Ubuntu. https://bugs.launchpad.net/bugs/936552 Title: MacBookAir 4,1 trackpad does not work with evdev/multitouch driver Status in “lightdm” package in Ubuntu: New Status in “xserver-xorg-input-synaptics” package in Ubuntu: Confirmed Bug description: 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/936552/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
