I'm facing the same issue on Dell XPS 13 9380 and Type-C dock with 2 displays. Sometimes I'm seeing all 3 screens flashing, sometimes they go black but mouse pointer is visible (and it's moving). Like in the original report, it may take up to 20 seconds for screens to settle.
I'm facing the same issue on Dell XPS 13 9380 and Type-C dock with 2 displays. Sometimes I'm seeing all 3 screens flashing, sometimes they go black but mouse pointer is visible (and it's moving). Like in the original report, it may take up to 20 seconds for screens to settle.
Could be somehow related to #1883292.