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[Launchpad Bug Tracker <1311788@xxxxxxxxxxxxxxxxxx>]

** Branch linked: lp:ubuntu/trusty-proposed/compiz

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https://bugs.launchpad.net/bugs/1311788

Title:
  compiz lower window:<Alt>Button5 stops working

Status in Compiz:
  Fix Released
Status in Compiz 0.9.11 series:
  In Progress
Status in “compiz” package in Ubuntu:
  Fix Released
Status in “compiz” source package in Trusty:
  Fix Committed

Bug description:
  [Impact]

  Users who have the horizontal scroll buttons mapped with a modifier
  such as 'Alt' to other functions using CCSM no longer have working
  mapped functions. This breaks the user's workflow.

  [Test case]

  * Need a mouse with horizontal scrolling, ie, click the mouse wheel left and right.
  * Open CCSM.
  * Map a function to the horizontal scroll buttons, ie, buttons 6 & 7. For example:
    * Enable workspaces.
    * CCSM->Viewport Switcher->Desktop-based Viewport Switching
    * Set "Move Next" to Alt + button 6 and "Move Prev" to Alt + button 7.

  [Regression potential]

  None identified.

  Original Description:

  
  Since upgrading to 14.04, compiz Lower Window key binding as alt+button5 is no longer working completely. It used to nicely cycle through windows but now if a window surfaces that is scrollable, the 'lower window' command stops responding and the window content starts scrolling vertically even though the alt key is still pressed. Clicking the window and then triggering 'lower window' again causes it to temporarily start working again until another scrollable window surfaces.

  This is configured under ccsm General Options->Key Bindings->Lower
  Window.

  It worked previously in 13.10. I have since tried unity-reset and
  reverting all compiz settings.

  Other settings:

  Click To Focus: off
  Raise On Click: on
  Auto-Raise: off
  Focus Prevention Level: Low

  I tested a different plugin "Opacity, Brightness and Saturation" with
  the same key binding <Alt>Button5 and it does not demonstrate the same
  behavior; I can tune any window opacity whether the window is
  scrollable or not.

  Setting the alternative Lower Window keyboard binding <Control>Down
  works without the same interference.

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