Black flickering unless anything changes on screen (z18)

[FSMcas]

Is there a different graphics driver in Zorin "try" and Zorin after installation?

Because Zorin 18 ran fine on my old ASUS Laptop with Intel HD 505 graphics while I used the live boot mode, but after performing the installation the system starts to flicker black after a few minutes:

The screen staays black completely unless anything changes, so if I keep the laptop untouched, it stays black, when I keep moving the mouse, the laptop screen works as intended. But every fram I do not move the mouse, type anything or watch somethign animated, the screen goes black instantly.

Sometimes, this stopsfor a few minutes and just works normally, but it always gets back to the flickering.

We tried using the other option with the cog before logging in (Xorg I think), didn't help.
We tried disabling PSR via terminal, grub etc as you find on some websites, didn't work.

Any ideas? thanks

[Ponce-De-Leon]

Welcome to the Forum!

So, it worked in Live Mode but not after the Installation ... the first Thing here that came to my Mind was the Point that Zorin runs in X11 in Live Mode, if I'm not wrong and when installed, it runs by default in Wayland. So, switching would be worth a Try. But You already did that, You wrote here:

@FSMcas

We tried using the other option with the cog before logging in (Xorg I think), didn't help.

Are Secure Boot and Fast Boot in BIOS disabled?
Is Windows is installed: Is Fast Start-Up in windows disabled?
Is Your BIOS in UEFI or Legacy Mode?
What Tool did You use to create the bootable USB Stick with zorin on it?

[Aravisian]

@Ponce-De-Leon

So, it worked in Live Mode but not after the Installation ... the first Thing here that came to my Mind was the Point that Zorin runs in X11 in Live Mode, if I'm not wrong and when installed, it runs by default in Wayland.

It actually can run in either, but often runs in X11 in Try Zorin.

But in Try Zorin, it is running a squashFS version of Zorin OS from RAM, rather than relying on installed hardware on the drive. In LiveUSB, the graphics stack is run tightly and conservative, whereas once installed, it includes the full init process and grub handoff.

@FSMcas

Intel HD 505 graphics

This should be the i915 driver, supplied by the kernel.

@FSMcas

grub etc as you find on some websites

Can you try these parameters, all at once?
Guide:

[HOW TO] add a grub parameter

There may be times that a user must add a specialized grub parameter in order to overcome an issue. The purpose of this guide is not to provide parameters, as that would be a case by case basis. It is to provide a guide on how to add one. To add a parameter, in a terminal (TTY, Recovery Prompt or Terminal Emulator) run: sudo nano /etc/default/grub Arrow key down to GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" and place your parameter within the quotation tags. For example if you are adding th…

Parameters (In your case, do not use nomodeset, just the below):

i915.enable_psr=0 i915.enable_dc=0 i915.enable_fbc=0

It will look like:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.enable_psr=0 i915.enable_dc=0 i915.enable_fbc=0"
Please remember to run sudo update-grub after saving the changes to grub file as outlined in the guide above.
I recommend a full cycle reboot, after.

This is tot disable runtime management, rather than panel self refresh, because since activity wakes the display, I think that i915 is putting the display into low-power state. When you move the mouse, creating an input event, it forces a redraw.