Try to load the i915 module early:
echo "i915" | sudo tee -a /etc/initramfs-tools/modules sudo update-initramfs -u -k all
See if HDMI/DP audio is available after reboot.
Try to load the i915 module early:
echo "i915" | sudo tee -a /etc/initramfs- tools/modules
sudo update-initramfs -u -k all
See if HDMI/DP audio is available after reboot.