** Patch added: "Proper patch format." https://bugs.launchpad.net/mactel-support/+bug/1034132/+attachment/4070191/+files/appletouch-smoothness.patch
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1034132 Title: [MacBook2,1] Touchpad cursor moving in steps Status in Mactel Support: Confirmed Status in “xorg” package in Ubuntu: Confirmed Bug description: I'm on a MacBook2,1, running a fully updated Ubuntu 12.04. When using the internal Touchpad (appletouch driver), the cursor only moves horizontally or vertically. When dragging a diagonal line, the cursor will move in steps, basically rendering the builtin touchpad unusable. This issue is also described in a forum thread: http://ubuntuforums.org/showthread.php?t=813884&page=6 WORKAROUND: In precise, in the second post on page 6 describes a solution. In the linux kernel, in appletouch.c, change the following two defines and recompile: Original: #define ATP_FUZZ 16 #define ATP_THRESHOLD 5 New: #define ATP_FUZZ 0 #define ATP_THRESHOLD 3 I tried this and can confirm that the touchpad is now fully usable. However, recompiling the kernel takes several hours and *all* of the disk space on my laptop. Doing this on every kernel update is just not practical. I would therefore like to ask that this be applied as a patch to the default ubuntu kernel. At the very least, please make an optional package containing the patched appletouch driver that can be selectively installed by people having this issue. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-generic 3.2.0.27.29 ProcVersionSignature: Ubuntu 3.2.0-27.43-generic 3.2.21 Uname: Linux 3.2.0-27-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 2.0.1-0ubuntu12 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: damian 1778 F.... pulseaudio CRDA: country AW: (2402 - 2482 @ 40), (N/A, 20) (5170 - 5250 @ 40), (N/A, 20) (5250 - 5330 @ 40), (N/A, 20), DFS (5490 - 5710 @ 40), (N/A, 27), DFS Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0x90440000 irq 43' Mixer name : 'SigmaTel STAC9221 A1' Components : 'HDA:83847680,106b2200,00103401' Controls : 25 Simple ctrls : 13 Date: Tue Aug 7 21:35:12 2012 HibernationDevice: RESUME=UUID=a7716e7d-8718-4fe9-988f-958519d6a2c2 InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64+mac (20120425.1) MachineType: Apple Inc. MacBook2,1 ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=de_DE.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-27-generic root=UUID=c63dd388-29f9-43dc-a835-0b471ccb2f85 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.2.0-27-generic N/A linux-backports-modules-3.2.0-27-generic N/A linux-firmware 1.79 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 06/27/07 dmi.bios.vendor: Apple Inc. dmi.bios.version: MB21.88Z.00A5.B07.0706270922 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: Mac-F4208CA9 dmi.board.vendor: Apple Inc. dmi.board.version: PVT dmi.chassis.asset.tag: Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: Apple Inc. dmi.chassis.version: Mac-F4208CA9 dmi.modalias: dmi:bvnAppleInc.:bvrMB21.88Z.00A5.B07.0706270922:bd06/27/07:svnAppleInc.:pnMacBook2,1:pvr1.0:rvnAppleInc.:rnMac-F4208CA9:rvrPVT:cvnAppleInc.:ct10:cvrMac-F4208CA9: dmi.product.name: MacBook2,1 dmi.product.version: 1.0 dmi.sys.vendor: Apple Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/mactel-support/+bug/1034132/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
