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[Daniel van Vugt <vanvugt@xxxxxxxxx>]

** Summary changed:

- transparent panel fails to properly blur desktop background
+ Transparent gnome-panel fails to properly blur desktop background

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https://bugs.launchpad.net/bugs/553716

Title:
  Transparent gnome-panel fails to properly blur desktop background

Status in “gnome-panel” package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: gnome-panel

  Description: Ubuntu lucid (development branch)
  Release: 10.04
  gnome-panel: 1:2.30.0-0ubuntu1
  compiz: 1:0.8.4-0ubuntu13

  Using updated Lucid (as of 04/01/10) the GNOME panel no longer blurs
  the desktop background behind it properly. I'm using the Compiz Blur
  plugin (Blur Filter: Gaussian, Gaussian Radius: 15, Gaussian Strength:
  0.1000, Mipmap LOD: 5, Independent texture fetch), Compiz Opacity,
  Brightness and Saturation plugin ((class=Gnome-panel) & class=90) and
  a png background image for the panel with an alpha channel (approx.
  25% opaque).

  Before this bug the panel was beautiful and the text clearly readable
  with most backgrounds, but now it looks pretty bad unfortunately. I've
  experimented with different settings, themes, etc., but the effect
  remains the same. If I use Alt-Middlemouse over the panel to gradually
  adjust the panel opacity, it will slightly blur the desktop background
  at around the 25% opaque mark, but the blur strength doesn't
  correspond at all to the blur strength of other windows' opacity
  levels.

  With the panel set to 25% opaque, moving a window behind the panel
  will result in the window being more blurry than the desktop
  background, where before they'd be blurred by the same amount. Using
  the panel properties (Solid color with transparency) results in no
  blurring at all of the background or windows moved underneath it.
  Using only the alpha channel in the panel background image for
  transparency results in no blur at all in the desktop background and
  any windows moved under the panel can't be seen at all.

  There are several similar problems here, all of which I hope are
  related to one or more recent changes in gnome-panel or Compiz and/or
  its plugins. Which themes are used seems to be irrelevant.

  Here's the panel background image I'm using if anyone would like to experiment with this:
  http://www.eightvirtues.com/misc/bar_horizontal_05_supertrans_32.png

  Here's my Compiz settings:
  http://www.eightvirtues.com/misc/Compiz_Settings (right-click, Save Link As)

  ProblemType: Bug
  DistroRelease: Ubuntu 10.04
  Package: gnome-panel 1:2.30.0-0ubuntu1
  ProcVersionSignature: Ubuntu 2.6.32-18.27-generic 2.6.32.10+drm33.1
  Uname: Linux 2.6.32-18-generic x86_64
  NonfreeKernelModules: nvidia
  Architecture: amd64
  Date: Thu Apr  1 20:31:49 2010
  InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
  ProcEnviron:
   LANG=en_US.utf8
   SHELL=/bin/bash
  SourcePackage: gnome-panel

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