When I start up or restart my computer, I see the gray underscore in the top-left corner, flashing as it should. Sometimes though, it just keeps flashing, and the system doesn't start. If I try to boot in recovery mode, I can see the text log instead. From there, it gets stuck at a few common points. Again, it's just stuck there until I reboot it.
Anyway, this only seems to happen on Linux. It didn't happen with this computer under Windows 7. I've also had this computer for quite a bit, so I've already gone through plenty of AMD drivers and kernels. I don't think those are the issue.
Any help, or logs or something that I should be looking at? I'm using an AMD A8-3850 with the 6550D. Proprietary drivers, though it still occurred under the open source drivers. I can provide more information if it's needed. Thanks.