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<body><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> changed
<a class="bz_bug_link
bz_status_NEW "
title="NEW - [ILK/SNB/IVB/HSW Regression]igt/testdisplay causes *ERROR* Pipe A FIFO underrun"
href="https://bugs.freedesktop.org/show_bug.cgi?id=74102">bug 74102</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
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<td style="text-align:right;">Status</td>
<td>NEEDINFO
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<td>NEW
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [ILK/SNB/IVB/HSW Regression]igt/testdisplay causes *ERROR* Pipe A FIFO underrun"
href="https://bugs.freedesktop.org/show_bug.cgi?id=74102#c12">Comment # 12</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [ILK/SNB/IVB/HSW Regression]igt/testdisplay causes *ERROR* Pipe A FIFO underrun"
href="https://bugs.freedesktop.org/show_bug.cgi?id=74102">bug 74102</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 IVB with the latest drm-intel-nightly kernel. It still exists.
[root@x-ivb9 tests]# ./testdisplay
CRTC(20):[0] 1024x768 60 1024 1048 1184 1344 768 771 777 806 0xa 0x48 65000
CRTC(20):[1] 1024x768 75 1024 1040 1136 1312 768 769 772 800 0x5 0x40 78800
CRTC(20):[2] 800x600 75 800 816 896 1056 600 601 604 625 0x5 0x40 49500
CRTC(20):[3] 800x600 60 800 840 968 1056 600 601 605 628 0x5 0x40 40000
CRTC(20):[4] 640x480 75 640 656 720 840 480 481 484 500 0xa 0x40 31500
CRTC(20):[5] 640x480 60 640 656 752 800 480 490 492 525 0xa 0x40 25200
CRTC(20):[6] 720x400 70 720 738 846 900 400 412 414 449 0x6 0x40 28320
SUCCESS (297.282s)
[root@x-ivb9 tests]# dmesg -r|egrep "<[1-4]>"|grep drm
<3>[ 292.244378] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR*
uncleared fifo underrun on pipe A
<3>[ 292.244406] [drm:ironlake_irq_handler [i915]] *ERROR* CPU pipe A FIFO
underrun</pre>
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