Public bug reported:

When ever I open nautilus in a folder with files that could have
thumbnail it does not show thumbnails and it consume so much CPU power
that the fan of my computer become noisy.

I'm on Ubuntu gnome 15.04

Thumbnail only shows the clock symbol on the file without showing
thumbnail and it keep using about 10% without me even using it. When I
close Nautilus I see no problem. I'm using PCManFM and I don't see
thumbnail there but I do not notice any change in CPU usage.

When I go to a folder without file to preview CPU usage drop. I noticed
that mostly in folders with many files to preview and after about 2
minutes of leaving it open.

What I saw:
1. No thumbnails
2. High CPU usage

How to reproduce:
1. open nautilus on a folder with some files that show preview (Images, 
PDF..etc)
2. Wait for two minutes

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: nautilus 1:3.14.2-0ubuntu9
ProcVersionSignature: Ubuntu 3.19.0-26.28-generic 3.19.8-ckt4
Uname: Linux 3.19.0-26-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.3
Architecture: amd64
CurrentDesktop: GNOME
Date: Fri Aug 28 20:28:16 2015
EcryptfsInUse: Yes
GsettingsChanges:
 
InstallationDate: Installed on 2015-06-06 (83 days ago)
InstallationMedia: Ubuntu-GNOME 15.04 "Vivid Vervet" - Release amd64 (20150422)
JournalErrors: Error: command ['journalctl', '-b', '--priority', 'warning'] 
failed with exit code 1: No journal files were found.
SourcePackage: nautilus
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: nautilus (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug vivid

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https://bugs.launchpad.net/bugs/1489977

Title:
  Nautilus  no thumbnails and high cpu usage

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