Q4OS Forum

SamTheNewGuy

Member

Registered: 2026-08-27

Posts: 1

Flickering screen on version 6.8

Good day. I'm here to ask for help regarding a flickering screen. I installed Q4OS plasma and also tried Trinity in my pc witch's specs are as follows

• CPU: Intel(R) Pentium(R) CPU G3220 @ 3.00GHz
  RAM: 4GIB
  Graphics: Intel Xeon E3-1200 v3/4th Gen Core Processor Integrate Graphics
  No info about the mother board

Basically the seccond it starts to boot up. It starts to flicker turning the screen on and of in around 1sec intervals. This did not happen in a laptop I used to download and test the live version first, nor it has happened ever whit the old OS of the computer, nor with the menu options prior to booting up the live test of the OS.
The problem stops if I add the nomodeset. But even running sudo apt update does not fixit afther wards. I wanted to know how can this be fixed since I liked the OS for my PC and it will be quite a shame to have to drop it for this problem.

The problem is also visible with the same problem in plasma as well as trinity.

Already thanks for you help

q4osteam

Q4OS Team

Registered: 2015-12-06

Posts: 6,339

Website

Re: Flickering screen on version 6.8

Welcome to the forum

This is not a Q4OS problem, it is the kernel's i915 driver. Your G3220 has Haswell integrated graphics and the flickering starts the moment the kernel takes the display over - that is why it is identical in Plasma and Trinity, and why nomodeset stops it. Nothing on our side can change that behaviour.

To keep nomodeset, add it inside the quotes of the GRUB_CMDLINE_LINUX_DEFAULT= line in /etc/default/grub and run

sudo update-grub

- typed at the boot menu it only applies to that single boot, which is why it never survives a reboot.

Before settling for that, boot once with these instead of nomodeset:

i915.enable_ips=0 i915.enable_fbc=0 i915.disable_power_well=0

Those switch off the display power features that actually exist on Haswell, and one of them is the usual cause. (The i915.enable_psr=0 / i915.enable_dc=0 advice you will find all over the internet does nothing on your chip.)

Either way, please report it to the Intel graphics developers - they are the only ones who can fix it:
https://gitlab.freedesktop.org/drm/i915 … /-/issues/