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[rdbert <tohyf@xxxxxxxxx>]

** Also affects: kde-runtime (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: kdelibs (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1397671

Title:
  Kio slows down system when copying large files to USB disk

Status in kdelibs:
  New
Status in kde-runtime package in Ubuntu:
  New
Status in kdelibs package in Ubuntu:
  New
Status in kio package in Ubuntu:
  New

Bug description:
  When copying large files (more than 500MB) to USB disk, the entire
  system become very unresponsive, mouse movement jitters, and the music
  playing in VLC stutters/choppy. The USB disk is a 8GB flash drive
  formatted with ext4 (NTFS also have the same problem). Tried reducing
  the cpu priority and io priority of kio_file processes, but condition
  marginally improved.

  Interestingly, when copying the exact same files using 'cp' instead
  didn't reproduce this behaviour.

  I am using Kubuntu 12.04, 64-bit, with the following architecture and kernel version:
  3.13.0-37-generic #64~precise1-Ubuntu SMP Wed Sep 24 21:37:11 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux 

  For your reference, the installed version of the KDE can be obtained from the dolphin's version:
  dolphin:
    Installed: 4:4.8.5-0ubuntu0.1
    Candidate: 4:4.8.5-0ubuntu0.1
    Version table:
   *** 4:4.8.5-0ubuntu0.1 0
          500 http://mirror.unej.ac.id/ubuntu/ precise-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       4:4.8.2-0ubuntu2 0
          500 http://mirror.unej.ac.id/ubuntu/ precise/main amd64 Packages

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