Since putting Ubuntu 9.04 (Jaunty Jackalope)on my dell laptop there are already issues with a cpu core running at 100% due to Xorg. I followed a guide to revert back to a previous display driver from Intrepid Ibex but it did not work. To resolve the issue I found that by switching off remote desktop (vino-server) as suggested here has actually sorted it. Although I did not use 'sudo apt-get remove vino-server', I just went to 'System->Preferences-Remote Desktop' and switched off remote desktop here. Also the desktop effects would not enable so I could not use Compiz so I fixed it using this where whilst it may cause further issues, for the moment it is working and better than what it was. The issues are related to the Intel chipset where there is a more in depth explanation here. However, I will be patient and wait for the issues to be fixed now my laptop is running cooler and not peaking on a CPU core for no reason.
A site about my experiences with the technology I encounter. All views and opinions expressed are my own.