[Bug 102803] Screen shaking and blinking [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102803

--- Comment #19 from Matthew Thode <mthode at mthode.org> ---
Are there any kernel command line options I should test with (other than
drm.debug=0xe)?  I understand there's a log buffer one?

I'm currently running with i915.enable_guc_loading=1
i915.enable_guc_submission=1 (with the firmware) i915.nuclear_pageflip=1
i915.fastboot=1 and i915.semaphores=1 (not that semaphores are active on kbl or
skl).

i915.enable_rc6=0 makes the problem go away but results in higher power usage
(by about a watt).  In order to test I'd like to re-enable rc6 (it's default
enabled in 4.14.15 for me at least) and get any debug logs you need.

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