How to stop laptop from going to sleep when lid closed (18.04 LTS Mate)

[Karl Auer]

On Mon, 2020-04-20 at 08:25 +0200, Bo Berglund wrote:
> I need the laptop to continue running with the lid closed because it
> will normally be headless and accessed via SSH (PuTTY from Windows)
> or VNC. So the key actions need to be set as indicated by Colin.
> And this makes suspending it more difficult than just closing the
> lid..

Just locate that suspend key...

> I have hibernated for many years with Windows

YEARS?!? Jiminy, the most I've ever hibernated has been a day or two.
Must have had a major updates download hit after that.

> 2) But this is the killer with Ubuntu suspend:
> If the laptop is suspended then it is IMPOSSIBLE to get it back into
> operating state.

This is a relatively common problem with laptops of that vintage. It
seems to have gotten better with time and newer hardware. Just keep
googling. I seem to recall having to faff about with kernel command
lines to get a ThinkPad something-or-other suspending properly.

What happens if you do a software suspend (pm-suspend, IIRC)?

Regards, K.

-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Karl Auer (kauer at biplane.com.au)
http://www.biplane.com.au/kauer
http://twitter.com/kauer389

GPG fingerprint: 2561 E9EC D868 E73C 8AF1 49CF EE50 4B1D CCA1 5170
Old fingerprint: 8D08 9CAA 649A AFEF E862 062A 2E97 42D4 A2A0 616D