Hi, I've got Ubuntu 10.04 installed on brand new hardware with nvidia card and restricted drivers. Everything works well but I DO also have the power management warning on bootup. It usually lasts less than 5 seconds then disappears without any other related problems that I can see.
I only have beginner experience with Linux, but I would offer some advice. I have noticed that Xubuntu seems more stable and less prone to glitches that Ubuntu. I've installed it on a couple of machines with Great Experiences. With my brand new computer equipment I figured I needed more Bells, Whistles, and Wow... Ubuntu. Anyhow, even with all that, I still think Xubuntu is Better for a general purpose computer used mainly for Internet, Email, Word Processing and Spreadsheets. It's seems much less prone to annoyances. Also, I had glitches on my system from Upgrade. I recommend backing up your data and installing FRESH, then Installing Restricted Drivers, and then the Ubuntu Restricted Extras (or Xubuntu Restricted Extras). If it's possible to backup your XP and Ubuntu Data, I'd do that, then reinstall everything. Note: my systems that work perfectly only have Xubuntu on it, and on old hardware. My system that has a few minor glitches has Ubuntu 10.04 on it, as well as Windows 7.
As a last resort for Linux salvation you should skip Ubuntu and all other distributions and go directly to Debian Stable, and install the Stable verion, the most tested Linux Distribution out there.. but without any of the latest and greatest Linux software advancements of the last couple of years. And I'd install it on a clean system without Windows.
That being said, I'm new to Linux, so others with more Experience please add to (or subtract from) my advice. Good Luck with Linux, stick with it please!
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