Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: compiz (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1076393
Title:
Unity freezes when a program uses a lot of CPU and I hover an item on
the launcher
Status in Compiz:
New
Status in Unity:
New
Status in “compiz” package in Ubuntu:
Confirmed
Status in “unity” package in Ubuntu:
Confirmed
Bug description:
When an application suddenly starts using a lot of CPU (e.g. when I
import the favourites with Firefox from a big HTML file), Unity thinks
that the program doesn't respond to commands, and the window becomes
gray. Though, if I click a button in the window, it works. But if I
move the pointer on the launcher while the window is gray, Compiz
stops responding, the window becomes unresponsive but there isn't any
hard disk activity. I can move the mouse and switch to a TTY. If I run
"top" in the tty, I don't see any strange activity. If I kill compiz
and start another window manager (like Metacity), I can continue using
the program: I'm reporting the bug with Firefox and Metacity...
Another user noticed this behavior, so I made a python script for him
to analyze the activity with Unity and KDE while Chrome is starting.
Look at the attachments. "Memoria" means "Memory", "Utilizzo CPU"
means "CPU usage", "Rete"= Network, Trasmessi=sent, Ricevuti=received,
"Variazione dei processi" is the diff between two instances of "ps",
"Utilizzo risorse da parte di Compiz" was meant to monitor compiz, but
it didn't work.
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