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[Launchpad Bug Tracker <969039@xxxxxxxxxxxxxxxxxx>]

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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)

** Affects: compiz-core
     Importance: Undecided
     Assignee: Daniel van Vugt (vanvugt)
         Status: Incomplete

** Affects: unity
     Importance: High
     Assignee: Daniel van Vugt (vanvugt)
         Status: Incomplete

** Affects: unity-distro-priority
     Importance: High
         Status: Fix Committed

** Affects: compiz (Ubuntu)
     Importance: High
         Status: Fix Committed


** Tags: amd64 apport-bug precise rls-p-tracking
-- 
HUD appears when tapping Alt+Left very quickly
https://bugs.launchpad.net/bugs/969039
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