Comment 57 for bug 1774950

Thanks for the response. I'm on last year's model with a Core i5-7300U CPU @ 2.60GHz.

A couple further notes for me: It seems some users are reporting 100% repeatable failures. Mine are intermittent; so, it's a bit harder to tell if things have started working again.

My failure mode might be slightly different as well. Sometimes, the machine fails to go in to a suspend. In this case, it starts to go to sleep, gives me a "greyed out" screen (screen goes blank but doesn't turn off) with a cursor, and stays there for several minutes and then pops up at the login prompt. This is obnoxious, but at least hasn't led to data loss and is reasonably easy to recognize.

The second failure mode is more like you describe and is much more serious. The machine appears to have gone to sleep (screen turns off, not sure about other indicators. I don't normally pay attention to them). I put it in my bag, take it out, and at least one occasion realize it has been running because it's hot (though there were other failures where I didn't notice this, but then I was also biking through a chilly night, so maybe that kept it cool?) It does not wake up, and a forced shutdown with the power button is required.

About a week ago, I installed the tlp package with --install-suggests, which might be a contributor? I'm sure I experienced at least one of the "greyed out" failures prior to that, but I don't think any of the "black out/hard lock" failures, though I only upgraded to 18.04 about 2 weeks ago.