<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [SKL] Flashing black screen ([drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun)" href="https://bugs.freedesktop.org/show_bug.cgi?id=94605#c72">Comment # 72</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [SKL] Flashing black screen ([drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun)" href="https://bugs.freedesktop.org/show_bug.cgi?id=94605">bug 94605</a> from <a class="email" href="mailto:florian.kaiser@mpcdf.mpg.de" title="Florian Kaiser <florian.kaiser@mpcdf.mpg.de>"> Florian Kaiser</a> <pre>I was experiencing the same issues (logs attached) - display randomly going blank for a short time while working (moving the mouse around etc.) with corresponding underruns in the kernel log. Environment: Dell OptiPlex 7040/0Y7WYT with i7-6700 CPU 2x Dell U2415 displays connected via DP OpenSUSE Leap 42.1 kernel 4.1.31-30-default and vanilla 4.8.0 2x 16GB DIMMs as well, however removing one of them didn't change anything The nightly from 10/16/2016 seems to have fixed or at least greatly reduced it for me: Before the error happened multiple times an hour. With the nightly so far after one day, I haven't had the error while working. However, I can still trigger the same (or a similar?) error by switching my displays off and on again: # With nightly 4.8.0-drm-intel-20161016 Oct 18 13:36:59 fekpc org.kde.KScreen[1734]: kscreen.xrandr: Output 68 : connected = false , enabled = true Oct 18 13:37:00 fekpc org.kde.KScreen[1734]: kscreen.xrandr: Emitting configChanged() Oct 18 13:37:00 fekpc org.kde.KScreen[1734]: kscreen: Primary output changed from KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) to KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) Oct 18 13:37:00 fekpc kernel: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>