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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BYT/BSW]igt/gem_concurrent_blit and gem_reset_stats sporadically causes *ERROR* Timed out: waiting for Render to ack"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87184#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [BYT/BSW]igt/gem_concurrent_blit and gem_reset_stats sporadically causes *ERROR* Timed out: waiting for Render to ack"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87184">bug 87184</a>
from <span class="vcard"><a class="email" href="mailto:huax.lu@intel.com" title="lu hua <huax.lu@intel.com>"> <span class="fn">lu hua</span></a>
</span></b>
<pre>Created <span class=""><a href="attachment.cgi?id=111355" name="attach_111355" title="dmesg(kms_flip)">attachment 111355</a> <a href="attachment.cgi?id=111355&action=edit" title="dmesg(kms_flip)">[details]</a></span>
dmesg(kms_flip)
Many kms_flip subcases also have this issue.
Run ./kms_flip --run-subtest flip-vs-panning-vs-hang, it fails 1 in 2 runs.
root@x-bsw01:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# ./kms_flip
--run-subtest flip-vs-panning-vs-hang
IGT-Version: 1.9-geb799b2 (x86_64) (Linux:
3.18.0-rc7_drm-intel-next-queued_140fd3_20141226+ x86_64)
Using monotonic timestamps
Beginning flip-vs-panning-vs-hang on crtc 8, connector 29
1920x1080 60 1920 1966 1996 2080 1080 1082 1086 1112 0xa 0x48 138780
....
flip-vs-panning-vs-hang on crtc 8, connector 29: PASSED
Beginning flip-vs-panning-vs-hang on crtc 13, connector 29
1920x1080 60 1920 1966 1996 2080 1080 1082 1086 1112 0xa 0x48 138780
....
flip-vs-panning-vs-hang on crtc 13, connector 29: PASSED
Subtest flip-vs-panning-vs-hang: SUCCESS (49.886s)
root@x-bsw01:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# dmesg -r | egrep
"<[1-4]>" |grep drm
<3>[ 250.789840] [drm:__vlv_force_wake_get [i915]] *ERROR* Timed out: waiting
for Render to ack.
<3>[ 268.790830] [drm:__vlv_force_wake_get [i915]] *ERROR* Timed out: waiting
for Render to ack.</pre>
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