@shinyblue (and others) would you be able to try the 4.6.0-rc6 kernel? It looks like some new commits relating to i915 have been made since 4.6.0-rc4:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/log/?id=refs/tags/v4.6-rc6&ofs=300 drm/i915: Use fw_domains_put_with_fifo() on HSW drm/i915: Force ringbuffers to not be at offset 0 -2/+5 drm/i915: Adjust size of PIPE_CONTROL used for gen8 render seqno write drm/i915/skl: Fix spurious gpu hang with gt3/gt4 revs drm/i915/skl: Fix rc6 based gpu/system hang drm/i915/userptr: Hold mmref whilst calling get-user-pages drm/i915: Fixup the free space logic in ring_prepare drm/i915/skl+: Use plane size for relative data rate calculation I'm assuming if you install a recent kernel you don't get the i915_bpo module (Ubuntu's backported version of i915, not sure from when/where) ? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1568865 Title: [drm:intel_cpu_fifo_underrun_irq_handler [i915_bpo]] *ERROR* CPU pipe B FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1568865/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
