Alt-F10 locks up Unity

Bug #948522 reported by Bruno Girin on 2012-03-06
This bug affects 10 people
Affects Status Importance Assigned to Milestone
Fix Released
Marco Trevisan (Treviño)
Unity Distro Priority
unity (Ubuntu)
Marco Trevisan (Treviño)

Bug Description

Pressing Alt-F10 in any application shows the application's menu in the top panel and then locks up Unity in the sense that all mouse interaction stops working in the application and in the top menu bar, apart from the window close button.

Steps to reproduce:
1. Open an application (e.g. Firefox)
2. Press Alt-F10
-> note: sometimes, you have to keep alt pressed, and tapping F10 multiple times to trigger the bug
. The application's menu appears in the top panel and stays there
4. Mouse clicks have no effect anymore, whether in the application or in the top menu

Expected behaviour: Alt-F10 shouldn't do anything and certainly not lock the mouse.

Note that this may be related to bug #948519

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.4.0+bzr2054ubuntu0+654 [origin: LP-PPA-unity-team]
ProcVersionSignature: Ubuntu 3.2.0-18.28-generic 3.2.9
Uname: Linux 3.2.0-18-generic x86_64
ApportVersion: 1.94-0ubuntu2
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,move,vpswitch,snap,imgpng,gnomecompat,mousepoll,place,resize,grid,regex,session,wall,animation,workarounds,expo,fade,ezoom,scale,unityshell]
CrashDB: unity
Date: Tue Mar 6 22:41:42 2012
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110901)
SourcePackage: unity
UpgradeStatus: Upgraded to precise on 2012-02-11 (24 days ago)

Related branches

Revision history for this message
Bruno Girin (brunogirin) wrote :
Revision history for this message
Bilal Akhtar (bilalakhtar) wrote :

I don't have this issue with the same Unity version from the same PPA.

Which graphic card/driver do you have? That might explain part of the issue.

Changed in unity:
status: New → Incomplete
Omer Akram (om26er) on 2012-03-09
Changed in unity:
importance: Undecided → High
status: Incomplete → Confirmed
Revision history for this message
Łukasz Zemczak (sil2100) wrote :

I have experienced the same problem. I can reproduce it all the time in the following way:

1. Focus any application
2. Press and hold alt
3. Tap F10 a few times
4. Release alt

After this, unity is broken and unusable - the only way to get it back is restarting compiz. It seems rather critical. Currently I'm using unity 5.4.0+bzr2064ubuntu0+654 with compiz 1: My system is an i386 with the fglrx graphics driver.

Revision history for this message
Alan Pope 🍺🐧🐱 🦄 (popey) wrote :

+1 on both i386 and amd64 machines using unity-team/ppa today.

Didier Roche (didrocks) on 2012-03-22
description: updated
Changed in unity-distro-priority:
status: New → Fix Committed
importance: Undecided → High
Changed in unity (Ubuntu):
status: New → Confirmed
importance: Undecided → High
Changed in unity:
milestone: none → 5.8.0
Changed in unity:
assignee: nobody → Marco Trevisan (Treviño) (3v1n0)
Changed in unity (Ubuntu):
assignee: nobody → Marco Trevisan (Treviño) (3v1n0)
status: Confirmed → In Progress
Changed in unity:
status: Confirmed → In Progress
Changed in unity:
status: In Progress → Fix Committed
Changed in unity (Ubuntu):
status: In Progress → Fix Committed
Revision history for this message
Daniel van Vugt (vanvugt) wrote :

3v1n0, your fix for this bug is missing the safety check to avoid crashing on Alt+Enter. Like we did for:

I wonder if that's going to be a problem?...

Didier Roche (didrocks) on 2012-03-23
Changed in unity:
status: Fix Committed → Fix Released
Revision history for this message
Launchpad Janitor (janitor) wrote :
Download full text (5.4 KiB)

This bug was fixed in the package unity - 5.8.0-0ubuntu1

unity (5.8.0-0ubuntu1) precise-proposed; urgency=low

  * New upstream release.
    - New "push mouse offscreen" feature really difficult to get (LP: #923749)
    - unity-2d-panel crashed with SIGSEGV in
      unity::indicator::DBusIndicators::Impl::RequestSyncAll() (LP: #864737)
    - Pressing "Alt+Enter" causes compiz to crash in CompOption::value() from
      unity::UnityScreen::showLauncherKeyTerminate (LP: #960957)
    - SEGSIGV after unplugging external monitor (LP: #962693)
    - Background colorization should use a different heuristic (LP: #865239)
    - compiz+unity3d generates > 50 wakeups a second on idle system
      (LP: #917210)
    - [FFe, UIFe] HUD - The HUD does not respect launcher autohide or icon
      size settings (LP: #921506)
    - clicking on folders in the file lens does not open nautilus
      (LP: #921665)
    - No text inside multirange filters (LP: #927710)
    - can't alt-tab restore minimized uis which have an instance on another
      workspace (LP: #933397)
    - Ubuntu Software Center Unity launcher integration is not working
      (LP: #932280)
    - The line separator between the launcher and the dash is cleared when
      selecting a category (LP: #941082)
    - unity-panel-service crashed with SIGSEGV in g_hash_table_foreach()
      (LP: #937119)
    - Alt-F10 locks up Unity (LP: #948522)
    - multimonitor, launcher: Provide an option to display either a single
      launcher or a launcher on each display in a multi-monitor environment
      (LP: #950136)
    - multimonitor: Please give me a way to turn off sticky monitor edges
      (LP: #946104)
    - Unity 5.6: key bindings (such as Super) don't work on empty workspace or
      on slow/loaded systems (LP: #953089)
    - Alt+arrows keyboard shortcuts don't invoke Back and Forward navigation
      (LP: #953783)
    - HUD is sending 2 menu signals instead of 1 (LP: #956878)
    - 6th item of HUD not fully visible (LP: #957229)
    - HUD: seems to trigger operations more than once (LP: #960503)
    - Launcher gets always desaturated when using HUD on secondary monitor
      (LP: #961169)
    - [5.8 pre staging] launcher is displayed on the left screen, not the
      primary one (LP: #961281)
    - launcher icons do not re-saturate after dash is closed (LP: #961844)
    - Launcher shows arrows for applications on all workspaces (LP: #961977)
    - Dash - Implement overlay scrollbars in Dash (LP: #608124)
    - [UIFe] Dash - No message displayed when no results are returned in the
      Dash (LP: #711199)
    - Dash - "See more..." line should be base-aligned with section header
      (LP: #748101)
    - Dash - Missing category separator line in dash (LP: #850984)
    - Dash and Launcher - As soon as a user starts dragging a file from the
      Dash, there is a 'flicker' before the Launcher icons that are valid drop
      receptacles re-saturate (LP: #863230)
    - Dash - When multiple results have equal string match relevancy ranking,
      those with equal ranking should be then sorted by frequency of use.
      (LP: #871900)
    - Keyboard shortcut - F10 shortcut is used to show m...


Changed in unity (Ubuntu):
status: Fix Committed → Fix Released
Didier Roche (didrocks) on 2012-04-17
Changed in unity-distro-priority:
status: Fix Committed → Fix Released
Revision history for this message
Yuriy Voziy (yuretsz) wrote :

I don't see this fixed for current Unity

$ unity --version
unity 5.12.0

Revision history for this message
Daniel van Vugt (vanvugt) wrote :

Yuriy, if you still have problems in Unity 5.12, please log a new bug.

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