<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_REOPENED " title="REOPENED - [CI] igt@kms_draw_crc@draw-method-* - fail - CRC mismatch" href="https://bugs.freedesktop.org/show_bug.cgi?id=103184#c18">Comment # 18</a> on <a class="bz_bug_link bz_status_REOPENED " title="REOPENED - [CI] igt@kms_draw_crc@draw-method-* - fail - CRC mismatch" href="https://bugs.freedesktop.org/show_bug.cgi?id=103184">bug 103184</a> from <a class="email" href="mailto:stanislav.lisovskiy@intel.com" title="Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>"> Stanislav Lisovskiy</a> <pre>I've noticed an interesting correlation in dmesg logs for this bug: for ICL and SKL, crc verification always fails when we get FIFO underrun in between: 96.710052] [IGT] kms_draw_crc: starting subtest draw-method-rgb565-mmap-cpu-xtiled <7>[ 96.710303] [drm:drm_mode_addfb2] [FB:108] <7>[ 96.710359] [drm:drm_mode_addfb2] [FB:108] <7>[ 96.754277] [drm:drm_mode_setcrtc] [CRTC:41:pipe A] <7>[ 96.754309] [drm:drm_mode_setcrtc] [CONNECTOR:71:eDP-1] <7>[ 96.854202] [drm:drm_mode_addfb2] [FB:108] <7>[ 97.055161] [drm:drm_mode_setcrtc] [CRTC:41:pipe A] <7>[ 97.055220] [drm:drm_mode_setcrtc] [CONNECTOR:71:eDP-1] <3>[ 97.116516] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun <7>[ 97.116837] [drm:intel_fbc_underrun_work_fn [i915]] Disabling FBC due to FIFO underrun. <7>[ 97.148943] [IGT] kms_draw_crc: exiting, ret=99 Same pattern happens for all cases, for those architectures. I will continue investigating.</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> </ul> </body> </html>