I tried to do that in the mean time (using Alt F2), but no web browser in terminal, so couldn't finish it, and haven't been able to locate the report yet. .... Anyhow, I googled a little further and learned that compizconfig settings manager is a notorious culprit. So I did a compiz revert to standard followed by a unity --reset and uninstall of CCSM. And now it seems stable for quit some days....
Sorry if this is not the appropriate spot to put this comment, but hopefully it will be of use to someone else.
I tried to do that in the mean time (using Alt F2), but no web browser in terminal, so couldn't finish it, and haven't been able to locate the report yet. .... Anyhow, I googled a little further and learned that compizconfig settings manager is a notorious culprit. So I did a compiz revert to standard followed by a unity --reset and uninstall of CCSM. And now it seems stable for quit some days....
Sorry if this is not the appropriate spot to put this comment, but hopefully it will be of use to someone else.