dx-packages team mailing list archive

[Jesse Johnson <holocronweaver@xxxxxxxxx>]

@paultait22 I agree that the problems are almost certainly related, but
for bug fixing it is important to clarify what version resulted in what
variation of the bug so that devs can look at the changes between
versions and figure out where things went from bad to worse.  Most
developers don't have time to read the comments and aggregate all the
knowledge they contain.  Typically they read the initial bug report,
briefly scan the comments for clues, then declare the bug fixed as long
as the initial problem is solved.  Since your problem has one additional
condition, it is worth making a separate bug report that ALSO mentions
this bug report.

Hopefully in the future launchpad will offer an option for adding bug
variations so that a single report can house all the very similar but
non-identical bugs under one roof.

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https://bugs.launchpad.net/bugs/968533

Title:
  Alt-tab to Firefox sends Firefox to 100% CPU; unity-panel-service to
  80% CPU and hud-service to 20-80% CPU

Status in Unity:
  Confirmed
Status in “unity” package in Ubuntu:
  Confirmed

Bug description:
  I've been seeing UI hangs after switching tabs in Firefox, and
  switching from other applications to Firefox.

  It can take 3-8 seconds to change *tab*.  During this time the CPU is
  maxed out;  typical output from 'top' during this period shows 'hud-
  service' and 'unity-panel-service' combined using about the same CPU
  as Firefox itself:

   100 10.4  26:07.73 firefox            
    53  0.6   6:14.86 hud-service        
    38  1.5   6:42.14 unity-panel-service

  I suspect that the change is causing a (an inefficient) re-index
  related to updated menu structures.  (Eg. something like the history
  menu, although I can't see what it is as don't currently have a menu
  bar).

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