FWIW, I have the exact same problem (and can resolve it the exact same way, by moving my finger over my trackpad for a few seconds), and am on a different graphics card -- Intel Iris Graphics 540 (Skylake GT3e).
I'm not an expert in kernel/firmware stuff at all, and can't compile a kernel from scratch, but let me know if there's anything I can pull from my system that would be useful in diagnosing the issue.
