[windowed mode] Dash doesn't receive mouse events when mouse is pushed against right edge of the screen

I think this might be to do with the fact that as you "pushed" your cursor against the edge, the edge barrier kicked in and your input would get delivered off-screen. This should likely not happen and input should be where the cursor is, not where the edge barrier considers it to be for edge-push recognition.

although I can't seem to reproduce this inside messages or system settings app...
but I can reproduce it in dash

That's specific to unity8-dash. Not a unity8 issue.

krillin, rc-proposed, r351.

The bug is still there. If you move the mouse to the right edge you can scroll using the wheel, but vertical drags are not detected.

This bug was fixed in the package unity8 - 8.12+16.10.20160627.5-0ubuntu1

---------------
unity8 (8.12+16.10.20160627.5-0ubuntu1) yakkety; urgency=medium

  [ Albert Astals Cid ]
  * Stop watching the old header item height once it's not our header
    anymore
  * LVWPH: cull the header item when not on view to save some painting
  * Adapt test to new mock behaviour
  * Don't let the mouse go outside the parentItem (LP: #1525350)
  * Use non deprecated package names
  * Mark system includes as such
  * Fix initialization order warning
  * Do not rely on deleteLater not crashing on null pointers
  * Add more headers of classes we use for automoc to be run
  * CardTool: Fix the fallback value to be a size and not an integer
  * CardTool: Include Ubuntu Components since we're using units.gu
  * Rework tst_PreviewRatingDisplayCreationRanges

  [ Daniel d'Andrada ]
  * Cursor: Let AnimatedSprite run only on animated cursors and while
    the display is on (LP: #1588873, #1594358)
  * Fix missing screenshot when orientation changes while shell rotation
    ongoing (LP: #1587796)

  [ Josh Arenson ]
  * Make PreviewRatingSingleDisplay visible again after editing a
    review. (LP: #1587097)
  * Correct errors in all png images to prevent libpng warnings.

  [ Lukáš Tinkl ]
  * Fix some smaller issues with OOBE wizard password pages (LP:
    #1590467)
  * Prevent mouse wheel events from going through shell elements (LP:
    #1536268)
  * Do not let mouse and wheel events pass thru the titlebar (LP:
    #1588424)
  * Hide the maximize window button based on size restrictions (LP:
    #1541982)

  [ Marco Trevisan (Treviño) ]
  * Unity8.conf: ensure MIR_SOCKET is set for future customers (such as
    the dash)
  * ClientIndicator: be more informative about loading failures for
    dynamically created objects

  [ Michael Terry ]
  * Stop unity8 from getting in a "switch-to-greeter" loop when locking
    on a desktop. (LP: #1593718)

  [ Michael Zanetti ]
  * set minimum window sizes on dash
  * displace application windows when the OSK would cover them

  [ Nick Dedekind ]
  * Force dash to always stay in the main stage. (lp:#1592404) (LP:
    #1592404)
  * Save the last surface stage on stage drop. (LP: #1579003)
  * Default portrait only apps to the side stage. (LP: #1573153)

  [ Albert Astals Cid, Andrea Cimitan, Michał Sawicz, Nick Dedekind ]
  * Added live video playback in dash previews

 -- Michael Zanetti <email address hidden> Mon, 27 Jun 2016 18:48:59 +0000