To Rudiger and anyone else still having trouble - I think you will find this recent article very interesting and promising - "Intel Finally Delivers Stable i830GM/i845G Driver" - http://www.phoronix.com/scan.php?page=news_item&px=MTI1MzI
The bottom line is you will need xf86-video-intel (xserver-xorg-video-intel) 2.20.16. According to https://launchpad.net/ubuntu/+source/xserver-xorg-video-intel this is already available in the development version of the upcoming Ubuntu 13.04.
To Rudiger and anyone else still having trouble - I think you will find this recent article very interesting and promising - "Intel Finally Delivers Stable i830GM/i845G Driver" - http:// www.phoronix. com/scan. php?page= news_item& px=MTI1MzI
The bottom line is you will need xf86-video-intel (xserver- xorg-video- intel) 2.20.16. According to https:/ /launchpad. net/ubuntu/ +source/ xserver- xorg-video- intel this is already available in the development version of the upcoming Ubuntu 13.04.