OK, thanks. I had the same curiosity about user settings, so I did try adduser'ing a fresh account and logging in, and got the same (poor) result.
I also did an overnight memtest86, and tried verifying md5sums on installed packages in hopes of catching any random filesystem or memory corruption. So now I'm going with your last option: I reinstalled from the Intrepid live cd, and I suppose I'll just pin any packages that look X/compiz- related, then upgrade them slowly over the coming weeks and see if I can reproduce the problem with some particular upgrade. It might be interesting for somebody with more X experience to look at diff's between the various log files; e.g. I notice that there's an "underrun on pipe B" in the bad case, though googling around suggests that's a fairly generic error. -- [i965] black screen on compiz startup on dell 1420 w/ intel GM965 https://bugs.launchpad.net/bugs/318294 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs