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[Bob M Brown <969039@xxxxxxxxxxxxxxxxxx>]

This bug describes a behaviour that I'm currently seeing although not
with arrow keys. I am on Ubuntu 14.04 64bit with Unity 7.2.0. The
behaviour I've noticed affects key combinations EXCEPT arrow keys and
isn't an issue when I first boot my machine.

My machine has been running for 3.5 hours and now I've started noticing
that Alt-D especially as it's part of my workflow to put the focus in
the Chromium addressbar triggers the HUD popup. When I first boot this
is not a problem. Other combos like Alt-F pop up the file menu for a
brief moment and then the HUD pops over closing the menu.

As initially reported if I hold Alt for slightly longer and then press
the key I want then this does not happen.

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https://bugs.launchpad.net/bugs/969039

Title:
  HUD appears when tapping Alt+Left very quickly

Status in Compiz:
  Invalid
Status in Compiz Core:
  Invalid
Status in Unity:
  Fix Released
Status in Unity Distro Priority:
  Fix Committed
Status in “compiz” package in Ubuntu:
  Invalid
Status in “unity” package in Ubuntu:
  Fix Released

Bug description:
  When I press Alt plus any cursor key in quick succession, the HUD
  erroneously appears. This steals focus and disrupts the workflow quite
  severely. This was much worse in earlier Unity versions, 5.8 already
  made this a lot better. But this case still remains for me.

  When I leave some time (0.5 s or so) between pressing Alt and the
  cursor key, this does not happen. But when pressing them almost at the
  same time, the bug happens. I can reproduce this 100%, so feel free to
  ask for any additional debugging info.

  The problem is not that I hit the Cursor key before alt. This proves
  it:

  $ xev | grep -A2 ^KeyPress
  KeyPress event, serial 36, synthetic NO, window 0x3800001,
      root 0xbe, subw 0x0, time 17590219, (112,69), root:(113,867),
      state 0x0, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES,
  --
  KeyPress event, serial 36, synthetic NO, window 0x3800001,
      root 0xbe, subw 0x0, time 17590299, (112,69), root:(113,867),
      state 0x8, keycode 113 (keysym 0xff51, Left), same_screen YES,

  and I get the HUD.

  It does not matter which application/window is focussed. It happens in
  gnome-terminal, Firefox, or the blank desktop all alike.

  It does not happen with other Alt key combinations, just with the
  cursor keys. I also saw this happen quite a lot with Ctrl+Alt
  (controlling screen grab in KVM) or Ctrl+Alt+Cursor (changing
  workspaces), but I cannot reliably reproduce those.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: unity 5.8.0-0ubuntu2
  ProcVersionSignature: Ubuntu 3.2.0-20.33-generic 3.2.12
  Uname: Linux 3.2.0-20-generic x86_64
  ApportVersion: 1.95-0ubuntu1
  Architecture: amd64
  CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
  Date: Fri Mar 30 12:00:47 2012
  EcryptfsInUse: Yes
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110831)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, user)
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  SourcePackage: unity
  UpgradeStatus: No upgrade log present (probably fresh install)

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