Xfce Forum

cybertramp

Member

Registered: 2019-09-06

Posts: 5

When the notebook cover is opened, screen is black.

Hello!

I'm using Thinkpad s440 and installed Ubuntu 18.04.3 LTS.

I find problem..

When I use the laptop and close the cover and open it again after a while, the screen does not come back.

It's still a black screen state and all keys except the power button don't respond.

Remember that I had this problem before!
But still the same.

Is there a solution to this?

As a person who likes xfce, I hope this solves the problem.

Thanks! 고마워

Spass

Member

From: Poland

Registered: 2016-12-07

Posts: 133

Re: When the notebook cover is opened, screen is black.

Hello and welcome.

I think that Light Locker is the culprit here, there were many similar reports and I had this issue on my systems also. You can safely replace Light Locker with gnome-screensaver (looks nice) or xscreensaver (lightweight). There's also new xfce4-screensaver, but you'd need to add PPA and upgrade to Xfce 4.14 to make it work, so more trouble.

If you want to try my solution run:

sudo apt remove light-locker
sudo apt install PACKAGE

…where PACKAGE is gnome-screensaver or xscreensaver. It should work right away, but if not, try rebooting your laptop.

Some say that a workaround for your issue is to change tty on that black screen (for example Ctrl+Alt+F2) and then go back to tty7 (Ctrl+Alt+F7). But it's better to change the locker permanently in my opinion.

cybertramp

Member

Registered: 2019-09-06

Posts: 5

Re: When the notebook cover is opened, screen is black.

Thanks a lot!
Your solution work for my laptop well.

I installed xscreensaver. it is work perfectly.

I was impressed by your kind answer.
No other community has received this simple answer.

I hope this bug will be fixed in the next xubuntu version.

Thanks.

Sorry for the wrong location.

cybertramp

Member

Registered: 2019-09-06

Posts: 5

Re: When the notebook cover is opened, screen is black.

I'm glad that it worked for you. (We're referring to this thread: When the notebook cover is opened, screen is black). I also think that this forum has an awesome community, they've helped me a lot of times, so I try to help others too when I can.

Yes, this bug will be fixed in Xubuntu 19.10 fortunately, since light-locker will be replaced with xfce4-screensaver.

Thanks!