If you are having trouble with Ubuntu on your Sony Vaio, these links should fix all issues.
1. https://wiki.ubuntu.com/HardwareSupportComponentsVideoCardsPoulsbo
2. http://blog.bodhizazen.net/linux/ubuntu-12-04-gma500-poulsbo-boot-options
And maybe also the following in German but it’s a bit outdated and for < 12.04 releases: 3. http://www.datenteiler.de/ubuntu-auf-dem-sony-vaio-p/
or try pi-pixel, works out of the box. Video, sound etc etc
https://www.raspberrypi.org/blog/pixel-pc-mac/