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[Rolf Leggewie <786901@xxxxxxxxxxxxxxxxxx>]

lucid has seen the end of its life and is no longer receiving any
updates. Marking the lucid task for this ticket as "Won't Fix".

** Changed in: xorg-server (Ubuntu Lucid)
       Status: Triaged => Won't Fix

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https://bugs.launchpad.net/bugs/786901

Title:
  Screensaver sometimes doesn't start

Status in xorg-server package in Ubuntu:
  Fix Released
Status in xorg-server source package in Lucid:
  Won't Fix

Bug description:
  There is a problem with gnome-screensaver on Ubuntu 10.04 Lucid LTS.
  Sometimes the screensaver doesn't start and doesn't lock the screen
  after the idle timeout. A semi-reliable way how to trigger this bug is
  to move the mouse during fade-out before the screensaver kicks in. On
  the next idle timeout, screensaver doesn't start anymore.

  This is a security issue, because it leaves the computer unlocked.

  I found out that the problem is in the xserver-xorg-core package, in
  particular in the file Xext/sync.c. The xserver sometimes doesn't fire
  the alarm event. I looked at the upstream repository and the Maverick
  patches. The following two patches solve the problem for me:

  205_fix-bracket-values.patch (from upstream)
  206_fix-neg-sync-transition.patch (from Maverick)

  These patches are included in Maverick and Natty, so the only affected
  release is Lucid.

  Related:
  The same bug in Fedora: https://bugzilla.redhat.com/show_bug.cgi?id=566351
  Upstream patches: http://cgit.freedesktop.org/xorg/xserver/log/Xext/sync.c
  Related bug: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/595555

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