Restart LXQt desktop?

[pdh0710]

Hi... (Please excuse my English)

I just installed Lubuntu 20.04. I want to boot Lubuntu without turning on monitor,
and turn on monitor only when necessary. But, when I turned on the monitor of
booted Lubuntu(auto login), LXQt desktop was not displayed at all. What I see was
only black blank screen.
I connected to the Lubuntu using SSH and tried to wake up LXQt desktop, but can't.
The only thing I could do was reboot using SSH terminal.

There is a guide to restart various Linux desktop (https://www.maketecheasier.com/restart-frozen-desktop-linux/), but LXQt is missing.
How can I restart LXQt desktop when lately turning on monitor?

[ajgreeny]

Do you have autologin already set up, ie, login without a password being asked for?
If not, the system will get to the login screen and eventually that display will turn off unless a password is entered.

It may be possible to stop that occurring but I'm not sure how without searching.

See if this thread is any help.
https://ubuntuforums.org/showthread.php?t=2283523

[pdh0710]

Yes, I set up my Lubuntu to autologin(I edited my post) and to run screen saver in idle time.

[ajgreeny]

Does the screensaver need a password when you come out of it, or does the desktop lock automatically?

[pdh0710]

No.
Actually, I tried it 1 minute after my Lubuntu booting, for test.
But the result was same, the black blank screen.
So I should reboot my Lubuntu using SSH.