Comment 125 for bug 1958191

I am using an HP G3 450 with 6th gen i7
I have tried it all
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.enable_dc=0 intel_idle.max_cstate=2"

Kernels up to 6.6.4

It does not work, external monitor flashes like a disco.

I cannot believe this issue is years old already on the i915 gfx

uname -a
Linux lap5 6.6.4-060604-generic #202312030734 SMP PREEMPT_DYNAMIC Sun Dec 3 07:46:41 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux

lshw | grep -A2 display
        *-display
             description: VGA compatible controller
             product: Skylake GT2 [HD Graphics 520]