On 2008.12.11 13:32:35 +0800, Nick Nobody wrote: > >>> I'm using Ubuntu 8.10 with a GM945 (at 1920x1080) for my media center > >>> PC. > >>> The problem I'm running into is a bunch of horizontal tearing on > >>> higher > >>> resolution videos (720p or greater). From what I can tell it's not a > >>> CPU > >>> limitation but rather something related to the graphics card... > >>> > >>> Are there any options that I can enable in my xorg.conf to help > >>> reduce/eliminate this tearing? Or is this simply a hardware > >>> limitation? > >>> Can XvMC somehow help me here? > >> > >>There aren't any options at this point, but I'm wondering -- is this > >>full-screen? If we made full-screen Xv operations block until vblank > >>(which would lock up the X server), would that be an acceptable option? > >> > >>It's actually very easy to do, just stick a 'wait for vblank' command > >>into the ring right before the 'copy the new picture' command in the Xv > >>extension code. It's just annoying when you're watching a tiny movie and > >>your whole session stops responding.
Keith, how about a Xv attribute for this? User can decide if want to turn it on or off. > > The GM945 only has the overlay adaptor, I initially thought that was the > cause too... No, 945 has texture video support, overlay should do vblank sync for you in the hw. -- Open Source Technology Center, Intel ltd. $gpg --keyserver wwwkeys.pgp.net --recv-keys 4D781827
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