Public bug reported:
I have a robotics application built on top of the OGRE3D rendering
system that works fine on a wide range of machines running Lucid. When I
switch to Precise, it runs so slowly on machines with Intel integrated
graphics that it's unusable. But it's fine on machines that use non-
Intel graphics (I tried a Dell Optiplex 755 with an ATI RV610 card,
which under Precise uses the Gallium 0.4 driver.)
I'm reporting this bug using an ASUS Eee PC 1015 netbook; with Precise
it uses the Intel IGD driver. I'm seeing the same problem on a Lenovo
Thinkpad X220, which uses the Intel Sandybridge Mobile driver.
To try to quantify the performance hit, I ran glxgears on the ASUS.
Under Lucid it reports 300 fps. Under Precise the same machine is
getting 59 fps. That's a 5x slowdown. The Lenovo is getting 60 fps under
Precise.
One more piece of info: my application runs fine on the ASUS and Lenovo
machines when I don't request off-screen rendering. If I'm only
rendering to the display, I can pan and zoom around in my virtual world
quickly and smoothly. But as soon as my robot client connects and starts
requesting off-screen rendering (simulated images for the robot's
camera), the performance falls apart and the application becomes
unusable. If I kill the client, which disables off-screen rendering,
performance returns to normal.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xorg 1:7.6+12ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic x86_64
.tmp.unity.support.test.0:
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
CompizPlugins:
[core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
CompositorRunning: compiz
Date: Tue May 15 02:35:36 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
Intel Corporation N10 Family Integrated Graphics Controller [8086:a011] (rev
02) (prog-if 00 [VGA controller])
Subsystem: ASUSTeK Computer Inc. Device [1043:83ac]
Subsystem: ASUSTeK Computer Inc. Device [1043:83ac]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120425)
MachineType: ASUSTeK Computer INC. 1015PX
ProcEnviron:
TERM=xterm
PATH=(custom, no username)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic
root=UUID=c610008c-72c8-4a92-862e-321cf5605c60 ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/18/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1101
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: 1015PE
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: x.xx
dmi.chassis.asset.tag: 0x00000000
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer INC.
dmi.chassis.version: x.x
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr1101:bd02/18/2011:svnASUSTeKComputerINC.:pn1015PX:pvrx.x:rvnASUSTeKComputerINC.:rn1015PE:rvrx.xx:cvnASUSTeKComputerINC.:ct10:cvrx.x:
dmi.product.name: 1015PX
dmi.product.version: x.x
dmi.sys.vendor: ASUSTeK Computer INC.
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
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu10.1
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
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug compiz-0.9 precise ubuntu
--
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/999493
Title:
Intel graphics drivers 5x slower in Precise Pangolin
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/999493/+subscriptions
_______________________________________________
Mailing list: https://launchpad.net/~ubuntu-x-swat
Post to : ubuntu-x-swat@lists.launchpad.net
Unsubscribe : https://launchpad.net/~ubuntu-x-swat
More help : https://help.launchpad.net/ListHelp
