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[Matthieu Baerts <matttbe@xxxxxxxxx>]

Hello and thank you for this bug report!

> I am experiencing a bug that happens when using the trackpad, but is not reproducible with a mouse.
This is strange... But I think this bug is not due to Cairo-Dock but maybe GTK+3.0.  I already had the bug #949414 but it's a bit different (as you can see there: https://launchpadlibrarian.net/96124653/bug949029_with_cairo-dock.ogv )
I know that GTK+3.0 detects if you're using a trackpad, touchscreen or a mouse but you shouldn't have this bug with a trackpad or a mouse (except if your trackpad is detected as a touchscreen).
What's the output of this command (launched from a terminal):
    $ xinput

Also it can be interesting to have GTK logs about the input and events by launching the dock with this command:
    $ GDK_DEBUG=input,events cairo-dock
(But I think GTK+3 needs to be recompiled with this option: --enable-debug=yes)

Is it maybe possible to launch the dock with this command and post here all messages that you'll have only when you try to reproduce the bug with your trackpad and with your mouse?
   $ cairo-dock -l debug

But about this bug I'm not able to reproduce it (with a trackpad, the dock on the left of the screen and with this callback mode: "hit a zone").
Is it maybe possible to try with another WM? (e.g. with Compiz instead of Kwin?)

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https://bugs.launchpad.net/bugs/993612

Title:
  erratic callback along top and left screen edges

Status in Cairo-Dock : Core:
  New

Bug description:
  I have upgraded my laptop (specs below) to Kubuntu 12.04, and along
  with it came the 2.0.0.1 version of Glx-Dock. I am experiencing a bug
  that happens when using the trackpad, but is not reproducible with a
  mouse. I have the dock on the left side of the screen, set to auto-
  hide and to appear when hitting a 200 x 2 zone. If I keep my cursor at
  the very left edge of the screen while I move it up and down the dock,
  or if I continue to press the cursor to the left edge of the screen,
  the dock will continuously disappear and reappear. I have created a
  YouTube video so you can see this bug in action:
  http://youtu.be/7rZrldD9hZU

  This bug did not occur with the version of Glx-Dock in Oneiric.  Here
  are some other notes on this bug:

   . The bug occurs whether the callback mode is the screen border, "where the dock is", or "hit a zone".
   . The bug occurs when the dock is on the top or left edge of the screen, but *not* on the bottom or right.
   . The bug occurs whether using Cairo-Dock or Glx-Dock.
   . The bug occurs whether desktop effects are enabled or disabled.
   . I tried deleting my ~/.config/cairo-dock folder, but the bug still persists. 

  One more thing: on multiple systems, I can reproduce what I believe is
  a related symptom of this same bug even when using a mouse. Here's
  how:

  1. With the dock set to auto-hide on the left, move the cursor to the very left edge of the screen. Right-click on the dock. This should bring up a menu, but instead causes GLX-Dock to hide.
  2. Move the cursor to the edge to show the dock again, but this time, move the cursor one pixel from the left and right-click... the menu appears!

  ** My System **
  OS: Kubuntu 12.04 i386 w/ KDE SC 4.8.2
  PC: HP Pavilion dv1550se laptop
  CPU: Intel(R) Pentium(R) M processor 1.60GHz
  RAM: 1.5GB DDR400
  Video: Mobile 915GM/GMS/910GML Express Graphics Controller
  Linux Kernel: 3.2.0-24-generic
  Screen Resolution: 1280 x 768

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