Touchpad configuration reset after suspend/resume on MacBookAir4,2

[Reuben Thomas]

On my Macbook Air 4,2 I have set it in System Settings to disable mouse clicks with touchpad. This setting works fine, but after suspend and resume, the touchpad once again sends mouse clicks, and I have to toggle the setting back on then off again to set the desired (no clicks from touchpad) behaviour.

I have no idea which package is really responsible, but the kernel seems the logical place to start; if I can supply any more information, don't hesitate to ask.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-18-generic 3.2.0-18.29
ProcVersionSignature: Ubuntu 3.2.0-18.29-generic 3.2.9
Uname: Linux 3.2.0-18-generic x86_64
NonfreeKernelModules: wl
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.94.1-0ubuntu2
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: PCH [HDA Intel PCH], device 0: Cirrus Analog [Cirrus Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: rrt 6828 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'PCH'/'HDA Intel PCH at 0xa0600000 irq 47'
   Mixer name : 'Intel CougarPoint HDMI'
   Components : 'HDA:10134206,106b5b00,00100302 HDA:80862805,80860101,00100000'
   Controls : 30
   Simple ctrls : 10
Date: Wed Mar 14 00:03:41 2012
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MachineType: Apple Inc. MacBookAir4,2
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-18-generic root=UUID=3f1df709-5d4e-4a93-8844-6cf574c52f87 ro rootflags=subvol=@ quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.2.0-18-generic N/A
 linux-backports-modules-3.2.0-18-generic N/A
 linux-firmware 1.71
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: Upgraded to precise on 2012-02-12 (30 days ago)
dmi.bios.date: 06/30/2011
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBA41.88Z.0077.B00.1106300929
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-742912EFDBEE19B3
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookAir4,2
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-742912EFDBEE19B3
dmi.modalias: dmi:bvnAppleInc.:bvrMBA41.88Z.0077.B00.1106300929:bd06/30/2011:svnAppleInc.:pnMacBookAir4,2:pvr1.0:rvnAppleInc.:rnMac-742912EFDBEE19B3:rvrMacBookAir4,2:cvnAppleInc.:ct10:cvrMac-742912EFDBEE19B3:
dmi.product.name: MacBookAir4,2
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.

[Seth Forshee (sforshee)]

Odd, I don't see this on the 4,1, which is mostly identical to your machine.

At any rate, this doesn't sound like a kernel problem. Pushing this up the stack to xorg.

[Bryce Harrington (bryce)]

Betting this has the same root cause as bug 968845

[Reuben Thomas (rrt)]

I've tried the workaround given at bug #968845; indeed, I've had the usbhid and bcm5974 modules listed in SUSPEND_MODULES ever since I first installed Ubuntu. I can therefore say that that workaround does not fix the bug I've reported. However, perhaps the workaround actually CAUSES the bug I'm experiencing, because when I suspend and resume my machine, the touchpad is reset? Is there some way I can get my configuration reapplied when the bcm5974 module is reloaded on resume?