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[Tom Vijlbrief <726902@xxxxxxxxxxxxxxxxxx>]

Well, I also have the problem in Oneiric. It really drives me nut. I tried every combination of
xorg.conf settings but could not get a setting with good results.

I'm using no window manager at all! I use the User Defined Session option from lightdm
and start XBMC from there. Without xorg.conf I have no tearing (because SwapBuffersWait is the
drivers default) but an irregular frame rate. Probably because XBMC cannot sync on the retrace in that
configuration.

When I add

 Option "SwapbuffersWait" "false"

to an /etc/X11/xorg.conf and enable VSync in XBMC I get regular frame rates when watching video
but always with tearing. The VSync Intel driver machinery on at least the Intel 945GM (first generation MiniMac)
is really screwed up. I'm using an HDMI display, I cannot remember having seen this issue when using analog VGA output.

XBMC on the same box using Windows-7 works fine, so it is not a hardware
limitation.

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to metacity in Ubuntu.
https://bugs.launchpad.net/bugs/726902

Title:
  [i945gm] Loss of vsync when using Metacity.

Status in “metacity” package in Ubuntu:
  Confirmed
Status in “xserver-xorg-video-intel” package in Ubuntu:
  Expired

Bug description:
  Binary package hint: xserver-xorg-video-intel

  Screenshot of tearing: http://i.imgur.com/J2YWn.jpg

  Tearing is visible whenever a video plays. Doesn't matter whether it's
  in a media player or Flash, Xv or GL. Using an external screen does
  not help.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: xserver-xorg-video-intel 2:2.14.0-1ubuntu11
  ProcVersionSignature: Ubuntu 2.6.38-5.32-genusername 2.6.38-rc6
  Uname: Linux 2.6.38-5-generic i686
  Architecture: i386
  CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,grid,compiztoolbox,snap,resize,vpswitch,gnomecompat,move,place,regex,wall,session,animation,expo,ezoom,staticswitcher,workarounds,fade,scale]
  CompositorRunning: None
  DRM.card0.LVDS.1:
   status: connected
   enabled: enabled
   dpms: On
   modes: 1440x900
   edid-base64: AP///////wBMo1dEAAAAAAAQAQOAHhN4Cof1lFdPjCcnUFQAAAABAQEBAQEBAQEBAQEBAQEBSCWgMFGEDDBAIDMAL74QAAAZAAAADwAAAAAAAAAAAHjmAiMAAAAA/gBDRzAwMgExNDFXRAogAAAA/gAXNkJKbo60/wIBCiAgAB8=
  DRM.card0.VGA.1:
   status: disconnected
   enabled: disabled
   dpms: Off
   modes:
   edid-base64:
  Date: Mon Feb 28 20:03:23 2011
  DistUpgraded: Fresh install
  DistroCodename: natty
  DistroVariant: ubuntu
  DkmsStatus:
   vboxhost, 4.0.4, 2.6.38-5-generic, i686: installed
   vboxhost, 4.0.4, 2.6.38-4-generic, i686: installed
  GraphicsCard:
   Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller [8086:27a2] (rev 03) (prog-if 00 [VGA controller])
     Subsystem: Dell Device [1028:01d8]
     Subsystem: Dell Device [1028:01d8]
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20101229)
  MachineType: Dell Inc. MXC061
  ProcEnviron:
   LANGUAGE=en_US:en
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-5-genusername root=UUID=6962d6df-ace0-470e-8518-44affc4c8716 ro quiet splash vt.handoff=7
  Renderer: Unknown
  SourcePackage: xserver-xorg-video-intel
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/10/2007
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A11
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA11:bd07/10/2007:svnDellInc.:pnMXC061:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct8:cvr:
  dmi.product.name: MXC061
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz 1:0.9.4-0ubuntu1
  version.libdrm2: libdrm2 2.4.23-1ubuntu3
  version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1~git20110215.cc1636b6-0ubuntu2
  version.xserver-xorg: xserver-xorg 1:7.6~3ubuntu8
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-1ubuntu11
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu5

  [lspci]
  Nux: lspci: 00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controlle

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