FYI as i just noticed it happens on the first and secondary screen with the known error:
May 23 14:16:23 HOSTNAME kernel: [18314.479875] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun ** Summary changed: - [Thinkpad T450s] Screen flickering on second monitor with docking station + [Thinkpad T450s] Screen flickering on external monitors with docking station -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1572667 Title: [Thinkpad T450s] Screen flickering on external monitors with docking station Status in xserver-xorg-video-intel package in Ubuntu: Confirmed Bug description: Ubuntu Gnome 16.04 RC. Screen does flickering some times. Intel HD graphics. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1572667/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
