I set up zorin core 16.1 a few days ago on a new PC. It's an intel nuc 11. Zorin works fine, but I have a problem as soon as I lock my screens (Ctrl + L) : after only a few seconds, the screens turns on again, then turns off and on again and again in a loop. Finally, my screens nevers really stop.
The installation is new, I did not install any screensaver-like package. No such option enabled.
I tried to disable notifications on the lockscreen: it works, but does not solve my problem. I tried disabling WIFI and prefer ethernet. I turned off bluetooth. Night light is disabled. Tried unplug usb keyboard/mouse/soundbar just in case. I also tried to change the (new) HDMI cables of the screens.
I don't understand why my two HDMI screens always turn back on. I work with another computer, and other screens right next to this one and all day long if I don't turn off the screens, I see them being blank, then turn on again --> slow blanking way (5 to 10 seconds off, then a minute on ... infinite loop until I became epileptic or just nervous ^^ )
On the other hand, it seems that sometimes the screens are black, but not turned off (I still see the cursor).
I'm not the first to have these problems (on other distros):
Do you have an idea how to do it?
Thanks for your help.