I too have a laptop with an AMD APU. Very similar one, in fact, a 3500M.
Originally Posted by ruinairas
In contrast to your experiences, this has got to be THE most stable device I've ever had the pleasure of owning. I have battery life that blows the "specs" out of the water, smooth stable performance, boot time under 5 seconds, suspend/resume work 100%, EVERY component working perfectly with a straight-out-of-the-box Fedora 17 install with updates as they come.
What interests me about your post is your reference to time. 5 minutes. I wonder if you might be experiencing a HEAT related issue? Have you checked if it is running high temperature when it locks up or shuts down? Do you have dual graphics? If you do, have you disabled the discrete chip or is it running? The discrete chip in mine has the ability to raise the temperature by over 25 degrees C when it is switched on and set to high. Does your cooling fan run fast when its about to shut down? Does your cooling fan run AT ALL EVER? Mine idles at 39-41 degrees C, fan comes on occasionally, but mostly off.
As others have explained, you could be experiencing an issue that is NOT related to the graphics or CPU. There is a lot of different hardware that could be responsible. BIOS as well. You could also be experiencing a bug in your distro.
AMD APU's are EXTREMELY stable in Linux.