O.K. that's sounds like it "installing nvidia driver for (whatever your card is)".
I'll reload from scratch, reboot, try it out.
If you delete xorg.conf and xorg.conf.pluto.avwizard after avwizard failure, things go much more smoothly... except that stoopid nvidia failure to reboot. Looking into it.
I'll try other things, record results, then delete the .conf stuff if necessary.
I need to figure out my ethernet issue along the way.
More than happy to test. More than happy to help.