OK, I tried the above, and unfortunately, it did nothing. Apparently, my system isn't using the nouveau drivers. :O
I don't know what to try now. Something with Ubuntu's kernel doesn't work well with my laptop. If you google "apportcheckresume", and limit the date range to, say, the past week, you'll see that some other people are having the same problem.
Thank you for help; hopefully the developers will fix this soon