How can I investigate the cause of total hang? Is there some information that I should pay attention to in order to get some hint?

[Mike Marchywka]

Does tapping the power button quickly bring everything back up? This sounds a lot
like the problem I had installing gdm over lightdm. I fixed it by reverting back to
lightdm. Before holding in the power button, just "click it" and see if that does anything.

Ihad this weird ritual worked out with cr and playing with the login screens
to get to the power button thing... I assume it is a misconfigured suspend attempt.

note new address
 Mike Marchywka 306 Charles Cox Drive Canton, GA 30115
 2295 Collinworth  Drive Marietta GA 30062.  formerly 487 Salem Woods Drive Marietta GA 30067 404-788-1216 (C)<- leave message 989-348-4796 (P)<- emergency


________________________________________
From: ubuntu-users <ubuntu-users-bounces at lists.ubuntu.com> on behalf of Drew Einhorn <drew.einhorn at gmail.com>
Sent: Saturday, July 4, 2020 8:43 AM
To: Ubuntu user technical support, not for general discussions
Subject: How can I investigate the cause of total hang? Is there some information that I should pay attention to in order to get some hint?

I'm starting a brand new thread,
I'm using the same title as the old.

Although the underlying cause is different, I do have the same problem.

I'm using my computer.
I walk away come back later.
It is now unresponsive, and at first, the only way I could recover was by cycling power and restarting.

By taking the advice in the prior thread I have made some progress, but not yet solved the problem.

On Sat, 4 Jul 2020 at 03:15, Drew Einhorn <drew.einhorn at gmail.com<mailto:drew.einhorn at gmail.com>> wrote:
>
> My system locks up, too.
>
> My Caps Lock key turns the light on and off.
>
> Ctrl-Alt-F2 gets me a tty2 login prompt and I can login.
>
> If I don't login but do a Ctrl-Alt-F7 before

I'm sorry at this point the email escaped before I was ready to send it.
I replied to my own message and added more information.
I'll restart at this point.

I see a message that indicates the screen is locked and that in a few seconds I will see an unlock dialog.
After a few seconds, the screen blanks and I am locked up again.
I looked around in /var/log and did not find anything useful.

How can I further troubleshoot this problem?
How do I get graphics up and running again?
How do I prevent this from happening?

At least now, I can restart the system more gracefully after logging in to tty2 without turning off the power.




--
Drew Einhorn
Where are we going?
And, why am I in this handbasket?