I'm seing this behavior also and can repeat it easily. Worst part is that i have set AreaBottomEdge and if I tap quickly above AreaBottomEdge and then below (most often with my thumb to trigger a left click) cursor jumps to an edge This happens roughly every 10th left click. Is there anyone with an idea for a workaround? This issue is kind of a dealbreaker for me to use ubuntu. Seems silly to to have to use something as awful as windows just to get a working touchpad
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-input-synaptics in Ubuntu. https://bugs.launchpad.net/bugs/1284318 Title: alternate finger tapping causes cursor to jump Status in xserver-xorg-input-synaptics package in Ubuntu: Confirmed Bug description: I've found that if I quickly alternate tapping with two fingers on the touchpad the cursor jumps wildly. This is quite frustrating for me as I often move the cursor with one finger on my right hand while subsequently clicking the bottom left of the touchpad with the left to cause a 'left click' action. Often this causes my mouse to jump to the bottom left of the screen and open the cinnamon menu window. It seems if I monitor events with xinput that the a[0] and a[1] events are being swapped. motion a[0]=4734 motion a[0]=4734 motion a[0]=4733 motion a[1]=1984 motion a[1]=1983 motion a[1]=1982 motion a[1]=1980 motion a[1]=1983 motion a[1]=1987 motion a[1]=1991 motion a[1]=1996 motion a[1]=2001 motion a[0]=2760 a[1]=4719 <-- Jump happens here ... Example 2: motion a[0]=4578 motion a[0]=4578 motion a[0]=4577 motion a[0]=4577 motion a[0]=4576 motion a[0]=4575 motion a[0]=4575 motion a[1]=1990 motion a[1]=1989 motion a[1]=1987 motion a[1]=1986 motion a[1]=1984 motion a[1]=1983 motion a[0]=4577 a[1]=1977 motion a[0]=1472 a[1]=4719 <-- Jump happens here motion a[0]=1472 a[1]=4722 I would have thought that the synaptics driver code would have identified 'erratic' input events which appear to be too far apart to be naturally occurring and simply filter them out? I could not repeat this when I loaded an Ubuntu 13.10 Live USB disk but the Synaptics TouchPad driver did not appear to be loaded at that time as it didn't appear in xinput list. ~> lsb_release -rd Description: Linux Mint 16 Petra Release: 16 ~>uname -a Linux chris-XPS13 3.11.0-12-generic #19-Ubuntu SMP Wed Oct 9 16:20:46 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux ~> dpkg -l | grep input-synaptics ii xserver-xorg-input-synaptics 1.7.1-0ubuntu1 amd64 Synaptics TouchPad driver for X.Org server ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: xserver-xorg-input-synaptics 1.7.1-0ubuntu1 [modified: usr/share/X11/xorg.conf.d/50-synaptics.conf] ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3 Uname: Linux 3.11.0-12-generic x86_64 ApportVersion: 2.12.5-0ubuntu2.2 Architecture: amd64 Date: Mon Feb 24 21:00:55 2014 InstallationDate: Installed on 2014-02-13 (11 days ago) InstallationMedia: Linux Mint 16 "petra" - Release amd64 20131126 MarkForUpload: True ProcEnviron: TERM=screen PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_GB.UTF-8 SHELL=/usr/bin/fish SourcePackage: xserver-xorg-input-synaptics UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-synaptics/+bug/1284318/+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
