Alt+Right arrow key trigger a kind of Alt + Tab

Bug #943612 reported by Nicolas Delvaux on 2012-02-29
This bug affects 8 people
Affects Status Importance Assigned to Milestone
Compiz Core
Sam Spilsbury
compiz (Ubuntu)

Bug Description

Pressing Alt+ "the right arrow key" will trigger the window switcher.

This is probably not intended, because:

- Other arrows don't trigger it
- This shortcut is used by other applications (eg. by Firefox to go forward)
- When it was triggered, releasing all keys does not quit the switcher (unlike Alt+Tab). You have to press Esc or Enter.

I have this problem on both Oneiric and Precise (up to date). I tried with 2 different laptops.

Revision history for this message
Nicolas Delvaux (malizor) wrote :

Reassigning to Unity, because I just realized it implements it's own Alt-tab (this bug happen only on Unity and no window switcher plugin is enable in CCSM)

affects: compiz-core → unity
Revision history for this message
Bilal Akhtar (bilalakhtar) wrote :

I don't have this problem. Probably it's a user configuration issue. Does running unity --reset fix the issue?

Revision history for this message
Nicolas Delvaux (malizor) wrote :

I just did "unity --reset", but I still have this problem.
If I press Alt and the right arrow key, the window switcher is trigered.

Revision history for this message
Tim Penhey (thumper) wrote :

I get this.

Perhaps it happens after alt-tab is used once, not sure. But I am able to reproduce.

Changed in unity:
status: New → Triaged
importance: Undecided → Critical
Revision history for this message
eric (obrowny06) wrote :

same for me with unity default settings (unity --reset).
alt +right arrow gives me an alt + tab fonction and releasing the keys it stays in the middle of the screen until I press enter !

Revision history for this message
Seb24 (seb117) wrote :

me too

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

"Critical", really?

affects: unity → compiz-core
Changed in compiz-core:
status: Triaged → In Progress
assignee: nobody → Sam Spilsbury (smspillaz)
milestone: none →
Revision history for this message
Sam Spilsbury (smspillaz) wrote :

Please don't make bugs critical unless they cause system failures.

Changed in compiz-core:
importance: Critical → High
Revision history for this message
Daniel van Vugt (vanvugt) wrote :

Fix committed into lp:compiz-core at revision 3038

Changed in compiz-core:
status: In Progress → Fix Committed
Revision history for this message
Daniel van Vugt (vanvugt) wrote :

This bug was fixed in the package compiz - 1:

compiz (1: precise; urgency=low

  [ Łukasz 'sil2100' Zemczak ]
  * New upstream snapshot:
    - Fix gtk-window-decorator crash upon demaximizing a window (LP: #930071)
    - Fix core keybindings (LP: #930412)
    - Fixes compiz crash with SIGSEGV on shutdown (LP: #931283)
    - Plugins can't tell the difference between a key-tap and modifier
      key-release (LP: #925293)
    - compiz-core r3001 (and 3002) ftbfs (LP: #933226)
    - Semi-maximized windows have no shadow or frame (LP: #924736)
    - Untranslated strings in gtk-window-decorator (LP: #780505)
    - Initialize the _NET_WM_STATE_FOCUSED (LP: #932087)
    - [regression] Customized shortcuts don't work (LP: #931927)
    - Window stacking problem (LP: #936675)
    - Quickly demaximized windows can receive maximized window decorations if
      they were initially maximized (LP: #936778)
    - Maximized windows do not get shadows at all (LP: #936774)
    - [regression] Launcher, top panel and keyboard un-responsive after using
      any Super-x shortcut (LP: #934058)
    - No draggable border if mutter isn't installed (LP: #936781)
    - Fix compiz crash with SIGSEGV in XDefineCursor() (LP: #936487)
    - Fixes memory leak at DecorWindow::updateSwitcher() (LP: #940115)
    - Unresolved symbols in plugins cause compiz to exit (LP: #938478)
    - Fix compiz spending about 51% of its CPU time in CompRegion
      construction/destruction (LP: #940139)
    - Fix Conditional jump or move depends on uninitialised value(s) in
      decor_match_pixmap (LP: #940066)
    - Fix 'show desktop' behaviour (LP: #871801)
    - Tweak algorithm used to cast shadows on maximized windows (LP: #936784)
    - "Svg" and "Png" should be "SVG and "PNG" (LP: #942890)
    - Fix invalid memory usage after free() in DecorWindow (LP: #943116)
    - Fix alt + F10 (LP: #943223)
  * Removed cherry-picked patches
  * debian/patches/fix_944631.patch:
    - Always replay the keyboard if something was grabbed and didn't trigger
      an action and don't trigger actions which aren't added accidentally
      (LP: #943612) (LP: #944631)
  * debian/patches/fix_923683.patch:
    - Backports a patch which prevents the shift race condition

  [ Didier Roche ]
  * debian/patches/fix_alt_pressing.patch:
    - Patch from ddv to fix all the regressions with the alt key fix and other
      (LP: #943851, #945373)
    - Fix Quicklist are not showing if right-clicking a launcher icon in Expo
      mode if triggered by Super + S (LP: #944979)
  * debian/patches/fix_806255.patch:
    - Unity/compiz intercepts keystrokes from grabbed windows (LP: #806255)
  * debian/patches/fix_943194.patch:
    - second part for the alt key fix (LP: #943194)
  * debian/patches/additional_alt_tapping_fix.patch:
    - again another alt tapping related fix for some regressions from the
      previous branch. Taken from "tapping-panacea" upstream branch.
 -- Didier Roche <email address hidden> Mon, 12 Mar 2012 10:22:10 +0100

Changed in compiz (Ubuntu):
status: New → Fix Released
Tim Penhey (thumper) on 2012-03-15
Changed in compiz-core:
status: Fix Committed → Fix Released
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