Unity Dash is very slow after update

[Anmar Oueja]

I have the proposed updates turned on and I noticed an Xorg update last week. After that upgrae, I noticed that when I push the "windows" button to open the dash where I can type a name of an application to launch becomes very slow. In addition, Alt+Tab becomes very slow as well.

I booted 13.04 from USB and tried and it didn't have those problems.

Please help

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: xorg 1:7.7+1ubuntu4
ProcVersionSignature: Ubuntu 3.8.0-24.35-generic 3.8.13
Uname: Linux 3.8.0-24-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.9.2-0ubuntu8.1
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
Date: Thu Jun 6 17:17:39 2013
DistUpgraded: Fresh install
DistroCodename: raring
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:21f9]
InstallationDate: Installed on 2013-03-25 (73 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130325)
MachineType: LENOVO 3443CTO
MarkForUpload: True
ProcEnviron:
 LANGUAGE=en_CA:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-24-generic root=UUID=afebbd9e-1f83-4c9d-9475-d1c7057b11aa ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/29/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: G6ET96WW (2.56 )
dmi.board.asset.tag: Not Available
dmi.board.name: 3443CTO
dmi.board.vendor: LENOVO
dmi.board.version: Win8 STD DPK TPG
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrG6ET96WW(2.56):bd04/29/2013:svnLENOVO:pn3443CTO:pvrThinkPadX1Carbon:rvnLENOVO:rn3443CTO:rvrWin8STDDPKTPG:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 3443CTO
dmi.product.version: ThinkPad X1 Carbon
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.9~daily13.04.18.1~13.04-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.43-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.1.3-0ubuntu0.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.1.3-0ubuntu0.1
version.xserver-xorg-core: xserver-xorg-core 2:1.13.3-0ubuntu6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2b2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.1.0-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.6-0ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.7-0ubuntu1
xserver.bootTime: Thu Jun 6 17:16:58 2013
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.13.3-0ubuntu6
xserver.video_driver: intel

[Anmar Oueja (anmar)]

the current rendering speed is around 2 seconds for the lense to show up.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Knef (knef)]

I supsect it is a problem in the implementation of the blur effect; if you disable blur with Compiz Config Setting Manager, both the Dash and the Alt Tab menu become fast again.

[Chad Yu (yuzhaobo77)]

Not only blur effect.... Alt+Tab switching window runs also very slow.

[Jan-Patrick Kaiser (japakaiser)]

I had the same problem - in ubuntu-tweak-tool i deactivated the blur effects and dash and the "alt-tab" worked fine after that

[Oscar Pintos Casal (opintos)]

I had the same problem too - Removing background blur in Unity Tweak Tool has solved the problem.