Screen flicker on wake-up

[Kosenator]

Hi there, you beautiful people! Thank you for the support in my fleeing from the Windows tyranny to the land of the free OS's! I have a little problem that is a bit annoying:

whenever I wake-up my computer (ASUS ProArt StudioBook 17") after shutting the screen down, the is a flicker around the border. To remove the flicker, it sometimes helps to play a video in full screen, but not always. And every time it happens, the flicker "expands inward", the flickering edge seems to grow inward with every wake-up, until I need to restart or shut down. And even restarting doesn't help always, the only way to be sure the flickering is out, is to shut down, wait a few minutes and start-up again.

Is there any setting or app that can help to alleviate this condition?

[DotWayton]

@Kosenator

ASUS ProArt StudioBook 17"

Hi Konsenator,
Did some quick digging on your laptop, if its running a Nvidia GPU, try the following

1. Log out
2. Click on where it says enter your password
3. Click on the gear in the bottom right
4. Change it to Zorin OS on Xorg
5. Log in like normal and it will save.

Zorin OS uses Wayland by default which has some beef with Nvidia GPU's here and there, See if Xorg fixes the issue (that will be your easiest fix if it is the case)

Let me know how you get on

[Ponce-De-Leon]

Beneath switching to Xorg: How are Resolution and Refresh Rate set up? And is Fractional Scaling active?

[Forpli]

You could also check whether the problem also occurs if you switch to suspend manually, i.e. with a button in the start menu or a shortcut.

If you find no easier solution that works you could try to add a kernel parameter (only when you have an integrated intel gpu). Enter in terminal

"sudo nano /etc/default/grub"

Go via arrow keys to line

GRUB_CMDLINE_LINUX_DEFAULT

and add

'intel_iommu=igfx_off` at the end of this line so that it looks like this (if you have further kernel parameters in this line, please keep them)
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_iommu=igfx_off"

Then press ctrl+o to save the change, Enter to confirm and ctrl+x to exit.

"sudo update-grub"

Then reboot.

An alternative could be this parameter added to the same line instead of intel_iommu=igfx_off:
"i915.enable_psr=0"

[chronosJ]

I know this one very well. @DotWayton, the gear thing is on the right track, but doesn't stop Wayland on the login screen and the flickering would continue unless you totally disable Wayland:

@chronosJ

had similar things happen when I was using Wayland, but it wasn't enough for me to just change the gear icon to X11/Xorg (I think the login screen still used Wayland, which still caused flickering -- sometimes until I rebooted!)

So, edit a config file like so:
sudo nano /etc/gdm3/custom.conf

Then, uncomment [remove the # from] the line containing:
WaylandEnable=false

Save it and reboot.

[Kosenator]

I am on Xorg, I cannot remember why I had to, but it had also something to do with Wayland and graphics.

[Kosenator]

[Forpli]

Everything is okay here.

[Kosenator]

Did that, now waiting. Will give feedback.

Update: No, still the flicker.

[Ponce-De-Leon]

Okay, that looks fine for me. And You wrote that you already on Xorg ...

• What Hardware Specs do You have?
• Do You have any third-party Gnome Extensions installed and active?

[Kosenator]

I only have what I installed from the Software Store (or whatever the blue briefcase is called)

[Kosenator]

I now repmoved and reinstalled the Quadro drivers, will see how that works.
The permanent disabling of Wayland and the advice to edit
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_iommu=igfx_off" Seemed to have helped - the flickering seems to have stayed at the edges this time, not move in with every wake-up - now I will see if reinstalling the Nvidia drivers ([How to] Reinstall NVIDIA Graphics Driver) will help also.

Update: Seems this is as good as it's going to get, for now (this doesn't happen in Windoze, could it be something to do with DirectX?), but it's much better than it used to be. Thank you for the support.