[Expired for Unity because there has been no activity for 60 days.]
** Changed in: unity
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1010898
Title:
unity transparency seems to use CPU
Status in Unity:
Expired
Status in unity package in Ubuntu:
Expired
Bug description:
When I play a video or open an opengl game and then open the dash or
press the Super-Key until the Dash-Help appears, then the CPU usage is
utilized heavily while the HUD shows up, when I expected no increased
CPU usage after the transitition (which is sluggish by the way),
because no additional operations on the CPU need to be done after the
dash help is opened. The only thing I can think of is transparency
which needs to be calculated, because the video is playing always
needs to be updated, but this shouldn't increase CPU usage, because it
_should_ take place on the GPU for being a purely graphical operation
which my graphics can do easily (blur inclusive).
The CPU utilization is lower if you switch from blur to no blur, so
this fortifies my assumption that the actual graphical transparency
calculation takes place on the CPU or that some ping pong effect moves
buffers from GPU to CPU and back, slowing things down, i don't know
after all.
Playing a video increases compiz CPU utilization from ~5 to ~20 and
and Xorg cpu utilization from ~5 to ~28
Also the FPS of video games decreases when the dash is activated, with
blur even more.
Last but not least, when I playback a video and activate the dash or
the dash help the video shortly interrupts for about ~200ms.
For comparison:
The single-parameter transparency of the compiz-plugin "Opacity, Brightness
and Saturation" does not affect CPU usage at all, at least not visibly.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.12-0ubuntu1.1
ProcVersionSignature: Ubuntu 3.2.0-24.39-generic 3.2.16
Uname: Linux 3.2.0-24-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Ist ein Verzeichnis:
'/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
NVRM version: NVIDIA UNIX x86_64 Kernel Module 295.49 Mon Apr 30 23:46:33
PDT 2012
GCC version: gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)
.tmp.unity.support.test.0:
ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
CompizPlugins:
[core,composite,opengl,decor,gnomecompat,place,move,snap,mousepoll,resize,compiztoolbox,imgpng,vpswitch,session,grid,regex,wall,unitymtgrabhandles,animation,expo,ezoom,workarounds,fade,scale,unityshell]
CompositorRunning: compiz
Date: Sat Jun 9 16:02:48 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
DkmsStatus:
nvidia-current, 295.40, 3.2.0-24-generic, x86_64: installed
nvidia-current-updates, 295.49, 3.2.0-24-generic, x86_64: installed
GraphicsCard:
NVIDIA Corporation G98M [GeForce G 105M] [10de:06ec] (rev a1) (prog-if 00
[VGA controller])
Subsystem: Acer Incorporated [ALI] Device [1025:0205]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120425)
JockeyStatus:
xorg:nvidia_current - Beschleunigter Grafiktreiber von NVIDIA (Proprietär,
Deaktiviert, Nicht benutzt)
xorg:nvidia_current_updates - NVIDIAs beschleunigte Grafiktreiber
(Nachträgliche Aktualisierungen) (Proprietär, Aktiviert, In Benutzung)
MachineType: Acer Aspire 5738
ProcEnviron:
LANGUAGE=de_CH:de
PATH=(custom, user)
LANG=de_CH.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic
root=UUID=954648ee-fb9c-484d-bda9-6e49dc0e779a ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
XorgConf:
Section "Device"
Identifier "Default Device"
Option "NoLogo" "True"
EndSection
dmi.bios.date: 02/20/2009
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: V1.03
dmi.board.name: JV50
dmi.board.vendor: Acer
dmi.board.version: Rev
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: N/A
dmi.modalias:
dmi:bvnPhoenixTechnologiesLTD:bvrV1.03:bd02/20/2009:svnAcer:pnAspire5738:pvr0100:rvnAcer:rnJV50:rvrRev:cvnAcer:ct10:cvrN/A:
dmi.product.name: Aspire 5738
dmi.product.version: 0100
dmi.sys.vendor: Acer
version.compiz: compiz 1:0.9.7.8-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.32-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu3.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu3.1
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu10.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1
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 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:0.0.16+git20111201+b5534a1-1build2
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