<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - Screen shaking and blinking [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun" href="https://bugs.freedesktop.org/show_bug.cgi?id=102803#c19">Comment # 19</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - Screen shaking and blinking [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun" href="https://bugs.freedesktop.org/show_bug.cgi?id=102803">bug 102803</a> from <a class="email" href="mailto:mthode@mthode.org" title="Matthew Thode <mthode@mthode.org>"> Matthew Thode</a> <pre>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.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are on the CC list for the bug.</li> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>