pi-rho: Can you please try booting with i915.powersave=0 to see if it fixes the issue? If that does not work, can you boot with drm.debug=0x04 added to grub and attach the dmesg output? Also, does this only happen at low brightness levels or does it also happen with the screen brightness at max as well?
pi-rho: Can you please try booting with i915.powersave=0 to see if it fixes the issue? If that does not work, can you boot with drm.debug=0x04 added to grub and attach the dmesg output? Also, does this only happen at low brightness levels or does it also happen with the screen brightness at max as well?