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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BYT/BSW]igt/gem_concurrent_blit kms_flip and gem_reset_stats sporadically causes *ERROR* Timed out: waiting for Render to ack"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87184#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [BYT/BSW]igt/gem_concurrent_blit kms_flip 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>Test on the latest -nightly kernel, It still has this issue.
root@x-bsw08:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# ./kms_flip
--run-subtest flip-vs-modeset-vs-hang
IGT-Version: 1.9-g5fb26d1 (x86_64) (Linux:
3.19.0-rc3_drm-intel-nightly_0056b6_20150109+ x86_64)
Using monotonic timestamps
Beginning flip-vs-modeset-vs-hang on crtc 19, connector 40
1920x1080 60 1920 1966 1996 2080 1080 1082 1086 1112 0xa 0x48 138780
...
flip-vs-modeset-vs-hang on crtc 19, connector 40: PASSED
Beginning flip-vs-modeset-vs-hang on crtc 24, connector 40
1920x1080 60 1920 1966 1996 2080 1080 1082 1086 1112 0xa 0x48 138780
...
flip-vs-modeset-vs-hang on crtc 24, connector 40: PASSED
Subtest flip-vs-modeset-vs-hang: SUCCESS (36.625s)
root@x-bsw08:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# dmesg -r|egrep
"<[1-4]>"|grep drm
<3>[ 512.803434] [drm:__vlv_force_wake_get [i915]] *ERROR* Timed out: waiting
for Render to ack.</pre>
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