Stretch/Sid not resuming from suspend
I'm using Stretch/Sid amd64 and I update it every few days. Since about
a month or so it fails to resume from suspend to RAM. It doesn't happen
regularly, it fails about 50% of the times. When it doesn't resume, I
get only a black screen in text mode with the blinking caret in the top
left corner of the screen. No keyboard input is working.
I'm using Xfce and I suspend always by hand using the menu. My kernel is
4.4.0-1-amd64 with nvidia legacy driver (340). I'm not sure but I seem
to recall the problem started when my driver moved from nvidia to
nvidia-legacy. Or, maybe, it started with some kernel update, but I
don't know which one.
I'd try with the nouveau driver but it proved to be even less reliable
than the nvidia, causing freezes also during normal use of the system.
The hardware is a Intel Core I5 notebook (Dell Precision M4500).
What can I do to pin down the issue?