I’m happy if you are 
My laptop has two graphics cards, an Intel skylake on-board, and an Nvidia. Normally I used the Nvidia, but I had a go switching to the Intel.
I have i965-va-driver 1.7.0-1, and kernel version 4.15.0-34-generic.
After switching to the Intel, the laptop failed to boot 
Fortunately I was able to boot with an older kernel and switch back to the Nvidia.
Google then lead me to the missing intel.conf that you spoke of, but I suspect the problem may be rooted in the hyper-threading bug (https://hothardware.com/news/intel-hyperthreading-bug-fixed). I’ll have to see if there is a bios update for my laptop when I next upgrade the system. In the meantime, I’ll stick with the Nvidia.