Public bug reported: Hi !
Ubuntu automatically generates an xorg.conf file when installing the proprietary Nvidia drivers. It works very well overall, however, one cannot get a smooth Compiz experience without addiing two options in xorg.conf. * Option "TripleBuffer" "True" : without this option, some effects like the "scale" effect (like the OSX Exposé) are *very* jerky. Moreover it might make things generally smoother at a cost of a little more delay in games which is generally not visible (I personally never noticed it) * Option "DynamicTwinView" "false" : this is sadly more annoying because it would disable some important features of the Nvidia drivers. However, I think it should be discussed with Nvidia, because this feature makes the nvidia driver report a bad vertical frequency value, which renders animations less smooth. * Moroever, the "Sync to VBlank" setting in "nvidia settings" should also be enabled by default. (I also filled in a report about the default Compiz value). All in all, getting a smooth Compiz (& OpenGL) experience with an nvidia GPU implies changing 4 values... I think this is a major concern for mainstream users... Because most of them will stay with the default values and have jerky / torn animations. (in movies / games / compiz) Cheers ! ProblemType: Bug DistroRelease: Ubuntu 10.10 Package: nvidia-current 256.53-0ubuntu2 ProcVersionSignature: Ubuntu 2.6.35-20.29-generic-pae 2.6.35.4 Uname: Linux 2.6.35-20-generic-pae i686 NonfreeKernelModules: nvidia .proc.driver.nvidia.version: NVRM version: NVIDIA UNIX x86 Kernel Module 256.53 Fri Aug 27 21:03:42 PDT 2010 GCC version: gcc version 4.4.5 20100909 (prerelease) (Ubuntu/Linaro 4.4.4-14ubuntu1) Architecture: i386 CurrentDmesg: [ 11.776250] ata1.00: configured for UDMA/133 [ 11.776254] ata1: EH complete [ 14.963059] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=0 [ 15.915077] EXT4-fs (sda3): re-mounted. Opts: commit=0 [ 22.116006] eth0: no IPv6 routers present Date: Sat Sep 11 14:44:27 2010 DkmsStatus: nvidia-current, 256.53, 2.6.35-20-generic-pae, i686: installed InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Alpha i386 (20100910) MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M. ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-20-generic-pae root=UUID=b632dd94-9cc0-4762-9480-28b067d8d171 ro quiet splash ProcEnviron: LANG=fr_FR.utf8 SHELL=/bin/bash SourcePackage: nvidia-graphics-drivers dmi.bios.date: 03/30/2009 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P1.40 dmi.board.name: P43DE dmi.board.vendor: ASRock dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP1.40:bd03/30/2009:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnP43DE:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.name: To Be Filled By O.E.M. dmi.product.version: To Be Filled By O.E.M. dmi.sys.vendor: To Be Filled By O.E.M. glxinfo: Error: [Errno 2] Aucun fichier ou dossier de ce type system: distro: Ubuntu codename: maverick architecture: i686 kernel: 2.6.35-20-generic-pae ** Affects: nvidia-graphics-drivers (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug i386 maverick -- Nvidia : default xorg.conf settings prevent smooth Compiz operation (jerky animation) https://bugs.launchpad.net/bugs/635724 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs