Rarely something breaks my system (other than me messing with it), but this update was one of them. At first I thought it was the kernel upgrade that also came by today, but downgrading this pkg to 530 ~ made X and gdm work again

  • I was able to boot just fine with 535, but Steam couldn’t launch because lib32-nvidia-utils didn’t make it out of multilib-testing yet. Temporarily enabling it and installing that package seemed to fix things for me. I’d check if that’s related to your issue.