Interesting. I tried changing this machine to Nvidia-only (nouveau driver) and the bug remains. So it's not unique to i915.
** Summary changed: - i915: Display flickers (monitor loses signal briefly) during "flickerfree" boot, while showing the BIOS logo on a black background + Display flickers (monitor loses signal briefly) during "flickerfree" boot, while showing the BIOS logo on a black background ** Also affects: plymouth (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1836858 Title: Display flickers (monitor loses signal briefly) during "flickerfree" boot, while showing the BIOS logo on a black background To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1836858/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs