[ubuntu] Blinking screen or blank desktop on startup (12.10)

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http://ubuntuforums.org – Hello folks, I've recently had some troubles with a fresh install of Ubuntu 12.10. The installation goes smoothly, and the first restart yields a relatively stable environment (there is a Compiz error of some sort). However, once I restart again, it's iffy: Sometimes it will work, sometimes it will be a blank desktop (with a mouse cursor, but keyboard shortcuts do nothing), but most of the time it is a blank screen with a blinking cursor and [OK] at the top. I was previously using 12.04 with no troubles. I suspected that it may be a video card issue, but after a fair bit of googling, all (Hardware)