I am just about finished setting up this new HP 15s-er1004AU laptop with Ubuntu 20.04.

However, when I shut the lid then open a bit later, I see a blank black screen.

I watch and wait. Nothing.

I press space. Nothing.

I press the on switch. Nothing.

Finally, I hold down the off switch for a few seconds. Ubuntu reboots and I can log in.

On my older Samsung laptop (Ubu 18.04), when I open the lid after a few minutes or a few hours, or days even, I get the login screen, type my password and Ubuntu is up and running again.

On the new laptop, if I just leave it alone: screen goes black, but touch a button and the log in screen appears.

But not when the lid has been closed.

Is there something I can do about this problem? Any tips please?

Following other threads on askubuntu.com, I tried:

pedro@pedro-HP:~$ cat /proc/acpi/wakeup
Device S-state Status Sysfs node
GPP1 S4 *disabled
GP17 S4 *enabled pci:0000:00:08.1
GPP0 S4 *disabled
pedro@pedro-HP:~$ sudo -s
[sudo] password for pedro:
Sorry, try again.
[sudo] password for pedro:
root@pedro-HP:/home/pedro# echo "LID" > /proc/acpi/wakeup
root@pedro-HP:/home/pedro# exit
exit
pedro@pedro-HP:~$ cat /proc/acpi/wakeup
Device S-state Status Sysfs node
GPP1 S4 *disabled
GP17 S4 *enabled pci:0000:00:08.1
GPP0 S4 *disabled
pedro@pedro-HP:~$

I don't know what GPP1 or GPP0 are or how I might enable them on this HP laptop!

I can't find anything with HP or LID in /sys/devices/platform except a folder called hp-wmi.

Anyone know where I should set S4 to "enabled" on this HP??

Or how to make it wake up after closing the lid??

For testing purposes, what happens when you suspend (or sleep) the computer from the menu, then close and later reopen the lid?

Sorry, I forgot all about this until now. Too many other things to do. Apologize!

I just suspended, then closed the lid, waited a few minutes, then reopened. I got my log in screen OK.

The trouble is, if I just close the lid, put the laptop in my bag, it quickly gets very hot and then will not start.

This happened to me twice, I don't want it to break. I now shutdown every time I want to put the laptop in my bag. (It boots very fast, so that is not too inconvenient.)

My old latop, a Samsung, also got warm, but never too hot.

This HP has Ryzen R7 processors, is very fast compared with my Samsung, but generates a lot of heat.

Apparently, it is still ticking over with the lid shut!

If I shut the lid, leave it on my desk and wait a long time, like overnight, I have found it sometimes won't recover.

You can usually set what state happens when you close the lid. The states are

• Standby - uses 90% power and blanks screen
• Suspend - suspends cpu to S3 & saves state to ram. Uses very low power.
• Hibernate - Saves state to disk & goes off.
• Switch off.

You probably are going to standby, so the fans blow and the box overheats in your bag.