ubuntu-x-swat team mailing list archive

[Bryce Harrington <bryce@xxxxxxxxxxxxxxxxxxx>]

** Summary changed:

- bad double buffering or vertical sync
+ Video tearing with KMS (no video overlay available)

** Description changed:

- Binary package hint: xserver-xorg-video-ati
+ [Problem]
+ Videos tear (show portions of two consecutive frames simultaneously) when KMS is used.  In Karmic it did not do this because of video overlay, which is not yet available with KMS.
  
- Reproducing video with totem or mplayer does not go smoothly,
- consecutive frames are mixed. It looks as if that double buffering was
- not being use or the buffer swapping was not synchronized with video
- vertical sync.
+ [Workarounds]
+ a) Turn off kernel modesetting by using the radeon.modeset=0 option on the kernel boot line.
+ 
+ or
+ 
+ b) Use xvattr to set XV_BICUBIC to 0.  Note that some IGPs are not
+ powerful enough to support bicubic filtering so turning it off may help.
+ 
+ [Original Report]
+ Reproducing video with totem or mplayer does not go smoothly, consecutive frames are mixed. It looks as if that double buffering was not being use or the buffer swapping was not synchronized with video vertical sync.
  
  It happens both in full screen and in window mode.
  
  I didn't have this problem with Ubuntu 9.10.
  
  ProblemType: Bug
  Architecture: amd64
  Date: Fri Jan 29 12:17:36 2010
  DistroRelease: Ubuntu 10.04
  DkmsStatus:
-  virtualbox-ose, 3.1.2, 2.6.32-12-generic, x86_64: installed 
-  virtualbox-ose, 3.1.2, 2.6.32-11-generic, x86_64: installed 
-  virtualbox-ose, 3.1.2, 2.6.32-10-generic, x86_64: installed
+  virtualbox-ose, 3.1.2, 2.6.32-12-generic, x86_64: installed
+  virtualbox-ose, 3.1.2, 2.6.32-11-generic, x86_64: installed
+  virtualbox-ose, 3.1.2, 2.6.32-10-generic, x86_64: installed
  InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20091209)
  MachineType: Hewlett-Packard HP dx5150 SFF
  Package: xserver-xorg-video-radeon 1:6.12.99+git20100126.e5933fd7-0ubuntu1
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-12-generic root=UUID=564eb7dd-0d11-4482-b882-f3794a37eb34 ro quiet splash
  ProcEnviron:
-  LANG=en_US.utf8
-  SHELL=/bin/bash
+  LANG=en_US.utf8
+  SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 2.6.32-12.16-generic
  RelatedPackageVersions:
-  xserver-xorg 1:7.5+1ubuntu2
-  libgl1-mesa-glx 7.7-0ubuntu8
-  libdrm2 2.4.17-0ubuntu2
-  xserver-xorg-video-intel 2:2.9.1-1ubuntu3
+  xserver-xorg 1:7.5+1ubuntu2
+  libgl1-mesa-glx 7.7-0ubuntu8
+  libdrm2 2.4.17-0ubuntu2
+  xserver-xorg-video-intel 2:2.9.1-1ubuntu3
  SourcePackage: xserver-xorg-video-ati
  Uname: Linux 2.6.32-12-generic x86_64
  dmi.bios.date: 02/24/2006
  dmi.bios.vendor: Phoenix Technologies, LTD
  dmi.bios.version: 1.13
  dmi.board.name: 09AC
  dmi.board.vendor: MSI
  dmi.chassis.asset.tag: CZC62933NH
  dmi.chassis.type: 3
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvr1.13:bd02/24/2006:svnHewlett-Packard:pnHPdx5150SFF:pvr:rvnMSI:rn09AC:rvr:cvnHewlett-Packard:ct3:cvr:
  dmi.product.name: HP dx5150 SFF
  dmi.sys.vendor: Hewlett-Packard
  glxinfo: Error: [Errno 2] No such file or directory
  system:
-  distro:             Ubuntu
-  architecture:       x86_64kernel:             2.6.32-12-generic
+  distro:             Ubuntu
+  architecture:       x86_64kernel:             2.6.32-12-generic

-- 
Video tearing with KMS (no video overlay available)
https://bugs.launchpad.net/bugs/514245
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which is the registrant for xserver-xorg-driver-ati.