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[Jean-Marc Lasgouttes <353449@xxxxxxxxxxxxxxxxxx>]

With my LyX developer hat on:

It is known indeed that LyX has problems with the way display is handled. Unfortunately,
nobody is has the right amount of knowledge and free time to fix that currently.

I would be interested to know what happens if you add to your preferences file (usually in the ~/.lyx directory) the
line:
  \use_qimage false

This will make LyX use a Pixmap (that lives in the display server)
instead of an image which lives in main memory.

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https://bugs.launchpad.net/bugs/353449

Title:
  lyx 1.6.x impossibly slow

Status in “lyx” package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: lyx

  I am using lyx 1.6.1 on Ubuntu 8.10. This program used to be my do-
  everything software, but it has become unusably slow.  That is,
  keystrokes are even delayed in displaying when I type.  The rest of
  the system is fine, and LyX didn't used to have such a problem. I'm
  not sure where to start in debugging this.

   apt-cache policy lyx
  lyx:
    Installed: 1.6.1-1~intrepid1
    Candidate: 1.6.1-1
    Version table:
       1.6.1-1 0
          500 http://ca.archive.ubuntu.com jaunty/universe Packages
   *** 1.6.1-1~intrepid1 0
          100 /var/lib/dpkg/status


  lsb_release -rd
  Description:	Ubuntu 8.10
  Release:	8.10

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