Experiencing it on Ubuntu 14.10
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Touch seeded packages, which is subscribed to unity in Ubuntu.
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 7.2 series:
Confirmed
Status in indicator-appmenu package in Ubuntu:
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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