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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BSW]igt/kms_render and pm_rpm cause *ERROR* pipe A underrun"
href="https://bugs.freedesktop.org/show_bug.cgi?id=85908#c6">Comment # 6</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [BSW]igt/kms_render and pm_rpm cause *ERROR* pipe A underrun"
href="https://bugs.freedesktop.org/show_bug.cgi?id=85908">bug 85908</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>drv_module_reload also has this error.
root@x-bsw01:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests#
./drv_module_reload
unbinding /sys/class/vtconsole/vtcon1/: (M) frame buffer device
module successfully unloaded
module successfully loaded again
root@x-bsw01:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# dmesg -r | egrep
"<[1-6]>" |grep drm
<6>[ 51.424294] drm_kms_helper: drm: unregistered panic notifier
<6>[ 51.843018] [drm] Module unloaded
<6>[ 52.622021] [drm] Initialized drm 1.1.0 20060810
<6>[ 53.336176] [drm] Memory usable by graphics device = 2048M
<6>[ 53.336194] [drm] Replacing VGA console driver
<6>[ 53.339087] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
<6>[ 53.339091] [drm] Driver supports precise vblank timestamp query.
<6>[ 54.014327] fbcon: inteldrmfb (fb0) is primary device
<6>[ 54.016482] [drm] Initialized i915 1.6.0 20150117 for 0000:00:02.0 on
minor 0
<6>[ 54.356930] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
<3>[ 54.449639] [drm:valleyview_pipestat_irq_handler [i915]] *ERROR* CPU pipe
A FIFO underrun</pre>
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