Looks like this affects me, also using a Dell XPS 15 9530.
I can confirm seeing the following line output each time the UI hangs:
Mar 31 20:06:52 luke-ultrabook kernel: nouveau 0000:02:00.0: bus: MMIO write of 00000002 FAULT at 4188ac [ IBUS ]
I also experience repeat input (as if I were holding down keys on the keyboard) while this occurs.
Looks like this affects me, also using a Dell XPS 15 9530.
I can confirm seeing the following line output each time the UI hangs:
Mar 31 20:06:52 luke-ultrabook kernel: nouveau 0000:02:00.0: bus: MMIO write of 00000002 FAULT at 4188ac [ IBUS ]
I also experience repeat input (as if I were holding down keys on the keyboard) while this occurs.