Hi Christopher, 4.5 rc5 has indeed fixed the issue for me. Thanks a lot :)
$ uname -a Linux river 4.5.0-040500rc5-generic #201602201730 SMP Sat Feb 20 22:32:16 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux $ dmesg | grep i915 [ 2.513449] i915: unknown parameter 'lvds_downclock' ignored [ 2.743658] [drm] Initialized i915 1.6.0 20151218 for 0000:00:02.0 on minor 0 [ 4.275935] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device [ 5.396543] snd_hda_intel 0000:00:1b.0: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915]) ** Tags added: kernel-fixed-upstream kernel-fixed-upstream-4.5-rc5 ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1550779 Title: [i915]] *ERROR* CPU pipe A FIFO underrun - Xorg glitches To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs