How can I debug Compiz crashing when I log in?

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http://askubuntu.com – I have tried to install Ubuntu 12.10 on my Dell Dimension 3000. I have been able to use Lubuntu in the past without any major snags, but after a successful installation of Ubuntu and logging on, I received error messages, one namely stating that Compiz had crashed. Be advised, Debian is more my speed, so I am a noob to Ubuntu. Mind you, the same errors/problems occur when booting Ubuntu directly from the DVD, though it does not state that Compiz has crashed. I have a handful of questions: A lot of questions analogous to mine are answered by people who suggest typing one command or another t (HowTos)