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            <b><a class="bz_bug_link 
          bz_status_REOPENED "
   title="REOPENED - [KBL][drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=101868#c16">Comment # 16</a>
              on <a class="bz_bug_link 
          bz_status_REOPENED "
   title="REOPENED - [KBL][drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=101868">bug 101868</a>
              from <span class="vcard"><a class="email" href="mailto:mthode@mthode.org" title="Matthew Thode <mthode@mthode.org>"> <span class="fn">Matthew Thode</span></a>
</span></b>
        <pre>as refrenced in <a class="bz_bug_link 
          bz_status_REOPENED "
   title="REOPENED - Screen shaking and blinking [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun"
   href="show_bug.cgi?id=102803">https://bugs.freedesktop.org/show_bug.cgi?id=102803</a> I think we
are good.

my kernel command line follows (for x1 carbon gen5 with a toshiba (iirc)
screen).  It enables rc6

initrd=\early_ucode.cpio initrd=\initramfs-4.14.30-gentoo.img
i915.enable_guc_loading=1 i915.enable_guc_submission=1 i915.semaphores=1
i915.nuclear_pageflip=1 i915.fastboot=1 psmouse.synaptics_intertouch=1
zfs.zfs_arc_max=3221225472 root=zfs:AUTO init=/usr/lib/systemd/systemd
page_poison=1 slab_nomerge vsyscall=none slub_debug=P ro i915.enable_gvt=0
i915.enable_rc6=1 i915.enable_psr=2 kvm.ignore_msrs=1 intel_iommu=off
log_buf_len=2M</pre>
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