Video tearing with KMS (no video overlay available)
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
xserver-xorg-video-ati (Ubuntu) |
Invalid
|
Undecided
|
Unassigned | ||
Bug Description
[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.
[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
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20091209)
MachineType: Hewlett-Packard HP dx5150 SFF
Package: xserver-
ProcCmdLine: BOOT_IMAGE=
ProcEnviron:
LANG=en_US.utf8
SHELL=/bin/bash
ProcVersionSign
RelatedPackageV
xserver-xorg 1:7.5+1ubuntu2
libgl1-mesa-glx 7.7-0ubuntu8
libdrm2 2.4.17-0ubuntu2
xserver-
SourcePackage: xserver-
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.
dmi.chassis.type: 3
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnPhoenixT
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
[lspci]
01:05.0 VGA compatible controller [0300]: ATI Technologies Inc RS480 [Radeon Xpress 200G Series] [1002:5954]
Subsystem: Hewlett-Packard Company Device [103c:3009]
Changed in xserver-xorg-video-ati (Ubuntu): | |
status: | New → Confirmed |
tags: | added: videoplayback |
Changed in xserver-xorg-driver-ati: | |
status: | Unknown → Confirmed |
summary: |
- bad double buffering or vertical sync + Video tearing with KMS (no video overlay available) |
description: | updated |
Changed in xserver-xorg-video-ati (Ubuntu): | |
importance: | Undecided → Wishlist |
description: | updated |
tags: | added: tearing |
Changed in xserver-xorg-driver-ati: | |
importance: | Undecided → Unknown |
status: | Invalid → Unknown |
importance: | Unknown → Undecided |
status: | Unknown → New |
no longer affects: | xserver-xorg-video-ati (Ubuntu) |
Playing video with mplayer or totem does not run smoothly. Consecutive frames appear mixed. It looks as if double buffering was not being used or the redraw/buffer swapping was not synchronized with the monitor vertical sync.
If happens with any video I have tried both at full screen and in window mode.
Video reproduction used to work fine with Ubuntu 9.10 on the same computer.