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[Marc Brevoort <kleinebre@xxxxxxxxxxx>]

100% CPU use by gedit is still an issue in 2016 (nearly 7 years now).

Making any selection with the keyboard (e.g. selecting a line with
shift-arrow down) triggers 100% cpu usage. Selecting a text with the
mouse leaves the CPU alone.

As soon as I hit ctrl-S or open the file menu with the mouse, CPU usage
drops again.

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https://bugs.launchpad.net/bugs/367372

Title:
  Gedit uses 100% of the CPU while editing files

Status in gedit:
  New
Status in gedit package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: gedit

  Making changes to a file(typing or deleting characters) makes gedit consume 100% of the CPU power available.
  I noticed this since I've installed Ubuntu 9.04. 

  I was poking in the fonts setting under the appearance preferences and
  I thought I noticed a slight difference if I turn off all processing
  and make the font glyph render without subpixel rendering and hinting.
  However it is merely marginal. To make sure it was not the graphics
  drivers I switched from the ati drivers to vesa but that did not help
  at all.

  I am running on a 5 years old Dell Inspiron 5100 laptop with Radeon Mobility 7500(details in lspci-vvnn.log provided in link below), with 256MiB of RAM.
  http://launchpadlibrarian.net/21840367/dmesg.log
  http://launchpadlibrarian.net/21840491/lspci-vvnn.log

  uname -a yields:
  Linux lordmetroid-laptop 2.6.28-11-generic #42-Ubuntu SMP Fri Apr 17 01:57:59 UTC 2009 i686 GNU/Linux

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