<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [IVB]igt/kms_flip/wf_vblank-interruptible sporadically causes *ERROR* uncleared pch fifo underrun on pch transcoder A" href="https://bugs.freedesktop.org/show_bug.cgi?id=85898#c1">Comment # 1</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [IVB]igt/kms_flip/wf_vblank-interruptible sporadically causes *ERROR* uncleared pch fifo underrun on pch transcoder A" href="https://bugs.freedesktop.org/show_bug.cgi?id=85898">bug 85898</a> from <a class="email" href="mailto:huax.lu@intel.com" title="lu hua <huax.lu@intel.com>"> lu hua</a> <pre>subcase rcs-wf_vblank-vs-modeset also has this issue. [root@x-ivb9 tests]# ./kms_flip --run-subtest rcs-wf_vblank-vs-modeset IGT-Version: 1.8-ge34240d (x86_64) (Linux: 3.18.0-rc3_drm-intel-nightly_e6b3eb_20141107_debug+ x86_64) Using monotonic timestamps Beginning rcs-wf_vblank-vs-modeset on crtc 8, connector 18 1024x768 60 1024 1048 1184 1344 768 771 777 806 0xa 0x40 65000 ....... rcs-wf_vblank-vs-modeset on crtc 8, connector 18: PASSED Beginning rcs-wf_vblank-vs-modeset on crtc 12, connector 18 1024x768 60 1024 1048 1184 1344 768 771 777 806 0xa 0x40 65000 ...... rcs-wf_vblank-vs-modeset on crtc 12, connector 18: PASSED Beginning rcs-wf_vblank-vs-modeset on crtc 16, connector 18 1024x768 60 1024 1048 1184 1344 768 771 777 806 0xa 0x40 65000 ...... rcs-wf_vblank-vs-modeset on crtc 16, connector 18: PASSED Subtest rcs-wf_vblank-vs-modeset: SUCCESS (65.045s) You have new mail in /var/spool/mail/root [root@x-ivb9 tests]# dmesg -r|egrep "<[1-4]>"|grep drm <3>[ 7658.287754] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A <3>[ 7658.287769] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A 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 on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>