Panel opacity affects opacity of background blur

[brncsk]

Setting the `Panel Opacity` option in CCSM to a value lower than 1.0 makes the blurred background of every Unity overlay (HUD, the dash, the alt-tab switcher, etc.) to be drawn partially transparent so that unblurred content shows through. The two attached screenshots show the effect of the bug at `Panel Opacity` set to 90% and 50% respectively.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.2.0+bzr1974ubuntu0+644
ProcVersionSignature: Ubuntu 3.2.0-16.25-generic-pae 3.2.6
Uname: Linux 3.2.0-16-generic-pae i686
.tmp.unity.scope.cities: Error: [Errno 21] Ez egy könyvtár: '/tmp/unity-scope-cities'
.tmp.unity.support.test.0:

ApportVersion: 1.91-0ubuntu1
Architecture: i386
CompizPlugins: [core,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,resize,fade,unitymtgrabhandles,scale,session,unityshell]
CompositorRunning: compiz
CrashDB: unity
Date: Wed Feb 15 17:14:40 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
GraphicsCard:
 Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller [8086:27a2] (rev 03) (prog-if 00 [VGA controller])
   Subsystem: Packard Bell B.V. Device [1631:c022]
   Subsystem: Packard Bell B.V. Device [1631:c022]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20120211)
MachineType: Packard Bell BV EasyNote_MX45
ProcEnviron:
 LC_CTYPE=hu_HU.UTF-8
 PATH=(custom, no user)
 LANG=hu_HU.UTF-8
 SHELL=/usr/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-16-generic-pae root=UUID=3b5bd063-3d5a-4bf5-afa6-3dfa4fb5e984 ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/04/2007
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: T12FvNC.302
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: EasyNote_MX45
dmi.board.vendor: Packard Bell BV
dmi.board.version: 1.0
dmi.chassis.type: 10
dmi.chassis.vendor: Packard Bell BV
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrT12FvNC.302:bd01/04/2007:svnPackardBellBV:pnEasyNote_MX45:pvrPB64E03549:rvnPackardBellBV:rnEasyNote_MX45:rvr1.0:cvnPackardBellBV:ct10:cvr:
dmi.product.name: EasyNote_MX45
dmi.product.version: PB64E03549
dmi.sys.vendor: Packard Bell BV
version.compiz: compiz 1:0.9.7.0~bzr2995-0ubuntu1
version.libdrm2: libdrm2 2.4.30-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0~rc2-0ubuntu5
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0~rc2-0ubuntu5
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.99.901+git20120126-0ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu3
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2

[Omer Akram (om26er)]

@Bilal did you try to reproduce the bug when confirming?

I tried with nvidia and a Sandy Bridge system the issue did not happen but with a netbook with an old GPU I can reproduce the bug.

[Doug McMahon (mc3man)]

You may want to look at this bug I have -
in this case quicklists opacity is affected by the panel opacity

The 'cause' of this is the png plugin
Bug 934543

[Omer Akram (om26er)]

thanks for your bug report. Is that still an issue in fully updated Ubuntu 12.04? I can't reproduce it here.

[brncsk (adam-barancsuk)]

Yes, this is still an issue on the original system I reported the bug from (using an old Intel 945GM card). It does not affect my newer, Intel HD Graphics 2000 based system, however. (I suspect the cause might be the 945GM using the non-GLSL code path, which seems to be a bit neglected compared to the GLSL one.)

[Omer Akram (om26er)]

I am going to test on a similar hardware and see if it happens for me.

[Omer Akram (om26er)]

confirmed on my netbook.

[Andrea Azzarone (azzar1)]

Can you still reproduce this problem?

[Doug McMahon (mc3man)]

I don't believe this occurs anymore (I don't see) but the oppisite has & still does occur -
https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1171658

[Launchpad Janitor (janitor)]

[Expired for unity (Ubuntu) because there has been no activity for 60 days.]

[Launchpad Janitor (janitor)]

[Expired for Unity because there has been no activity for 60 days.]