<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [SKL] [regression] Random display flickering on Kernel 4.8 with dual-screen" href="https://bugs.freedesktop.org/show_bug.cgi?id=97450#c1">Comment # 1</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [SKL] [regression] Random display flickering on Kernel 4.8 with dual-screen" href="https://bugs.freedesktop.org/show_bug.cgi?id=97450">bug 97450</a> from <a class="email" href="mailto:direx@betriebsdirektor.de" title="Direx <direx@betriebsdirektor.de>"> Direx</a> <pre>I am on 4.8-rc4 now and it seems like the flickering could be related to these messages: [21494.389755] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun [22199.026381] [drm:intel_pipe_update_end [i915]] *ERROR* Atomic update failure on pipe B (start=43427 end=43428) time 359 us, min 1192, max 1199, scanline start 1179, end 1206 [22585.897409] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe C FIFO underrun [26998.328003] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe C FIFO underrun [26998.999972] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun There is still a very short random flickering about once per minute and a longer flickering every 5-10 minutes. In the latter case I am getting a pipe underrun in the kernel log.</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 assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>