Ah! I was looking for this bug yesterday when duplicate bug 1965968 was reported.
** Summary changed: - Flickering white/black screen once KMS comes up + [Dell XPS 15 9575] Flickering white/black screen once KMS comes up -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1958620 Title: [Dell XPS 15 9575] Flickering white/black screen once KMS comes up To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1958620/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs