Is your video playing too fast in Ubuntu 10.10? Video playing 1.5x or 2.0x or greater? I was having the same problem, as was a friend of mine, on a number of my Ubuntu machines: video playing too fast. I did notice that on login the audio was crackling, skipping, and didn’t finish smoothly as it had on some machines. That was the key to solving the problem. The problem was in the ALSA sound configuration and is referenced as a crackling, skipping audio when logging in:http://ubuntuforums.org/showpost.php?p=9948061&postcount=2. This combined with the information that SoundBlasterLive! (yes, the one from Dell) card had audio problems and manifested itself in video speed gave me the idea to try the solution. I turned off the onboard sound controller, and added tsched=0 to the module-udev-detect AND to the module-detect line
### Automatically load driver modules depending on the hardware available
load-module module-udev-detect tsched=0
### Alternatively use the static hardware detection module (for systems that
### lack udev support)
load-module module-detect tsched=0
and the problem was solved. I now have very clear login audio. And Video, including Hulu, YouTube and others running at normal speed as best my machine can perform.