Also, you say there's no evidence of crashes but we should check to see if there are any crashes occurring without a trace. To do that please run:
pidof gnome-shell
in the evening and again in the morning. They should both report the same process ID.
Also, you say there's no evidence of crashes but we should check to see if there are any crashes occurring without a trace. To do that please run:
pidof gnome-shell
in the evening and again in the morning. They should both report the same process ID.