compiz team mailing list archive

[Didier Roche <didrocks@xxxxxxxxxx>]

Public bug reported:

Binary package hint: compiz

This bug is hard to describe and to record in gtk-recordmydesktop.

The issue seems to be a vsync one, as sometimes, when switching
workspace, you get some kind of "magnet" effect, with distortion for
less than half a second. We can notice as well some X damage issue not
repainted when scrolling fast on a webpage (so part of the page is
repeated).

Seems that enabling the force X to sync in the workaround and setting the sync to vblank in nvidia-settings reduces the issue (not completely fixing it so).
With unity using that by default, we should take that into account.

Plan of action:
- see if we can enable sync to vblank by default on nvidia-settings
- in the detection plugin, enable the compiz workaround if the driver is the proprieraty nvidia driver.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: compiz 1:0.9.2.1+glibmainloop2-0ubuntu4
ProcVersionSignature: Ubuntu 2.6.37-8.21-generic 2.6.37-rc4
Uname: Linux 2.6.37-8-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
CompizPlugins: No value set for `/apps/compiz/general/allscreens/options/active_plugins'
Date: Thu Dec  9 10:31:55 2010
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Alpha i386 (20100918)
MachineType: Dell Inc. MP061
PackageArchitecture: all
PciDisplay: 01:00.0 VGA compatible controller [0300]: nVidia Corporation G71 [GeForce Go 7900 GS] [10de:0298] (rev a1) (prog-if 00 [VGA controller])
ProcEnviron:
 PATH=(custom, user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.37-8-generic root=UUID=4b292599-da9a-4cb5-908f-a911be09c61a ro quiet splash nomodeset video=uvesafb:mode_option=1280x1024-24,mtrr=3,scroll=ywrap
RelatedPackageVersions:
 xserver-xorg 1:7.5+6ubuntu3b1
 libgl1-mesa-glx 7.9+repack-1ubuntu3
 libdrm2 2.4.22-2ubuntu1
 xserver-xorg-video-intel 2:2.13.901-2ubuntu1
 xserver-xorg-video-ati 1:6.13.2-1ubuntu2
SourcePackage: compiz
dmi.bios.date: 04/02/2007
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A08
dmi.board.name: 0YD479
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA08:bd04/02/2007:svnDellInc.:pnMP061:pvr:rvnDellInc.:rn0YD479:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: MP061
dmi.sys.vendor: Dell Inc.
system: distro = Ubuntu, architecture = i686, kernel = 2.6.37-8-generic

** Affects: compiz (Ubuntu)
     Importance: High
     Assignee: Sam "SmSpillaz" Spilsbury (smspillaz)
         Status: Triaged

** Affects: nvidia-settings (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 natty

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https://bugs.launchpad.net/bugs/687738

Title:
  nvidia driver seems to have sync to vblank issue