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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Priority</th>
<td>high
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [HSW Bisected]igt/kms_fbc_crc subcases skip"
href="https://bugs.freedesktop.org/show_bug.cgi?id=79932">79932</a>
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[HSW Bisected]igt/kms_fbc_crc subcases skip
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jinxianx.guo@intel.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=100910" name="attach_100910" title="dmesg">attachment 100910</a> <a href="attachment.cgi?id=100910&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: Yes.
Non-working platforms: HSW
==kernel==
--------------------------
origin/drm-intel-nightly: 1d3e80d9ff52ecaeecc5b78de32f9bb07ad2231f(fails)
drm-intel-nightly: 2014y-06m-11d-17h-06m-58s integration manifest
origin/drm-intel-next-queued: 93ec0735decd18e8bdbf8bb9067614f4174ae723(works)
drm/i915: Fix VLV CRC reading.
origin/drm-intel-fixes: 60671f01a626232532d5b2359bb39ddcce58ec06(fails)
drm/i915: fix possible refcount leak when resetting forcewake
==Bug detailed description==
-----------------------------
igt/kms_fbc_crc subcases skip
Cases list:
igt/kms_fbc_crc/blt
igt/kms_fbc_crc/context
igt/kms_fbc_crc/mmap_cpu
igt/kms_fbc_crc/mmap_gtt
igt/kms_fbc_crc/page_flip
igt/kms_fbc_crc/page_flip_and_blt
igt/kms_fbc_crc/page_flip_and_context
igt/kms_fbc_crc/page_flip_and_mmap_cpu
igt/kms_fbc_crc/page_flip_and_mmap_gtt
igt/kms_fbc_crc/page_flip_and_render
igt/kms_fbc_crc/render
Output:
./kms_fbc_crc
IGT-Version: 1.7-g4e9df4f (x86_64) (Linux:
3.15.0-rc3_drm-intel-fixes_60671f_20140611+ x86_64)
Test requirement not met in function __real_main487, file kms_fbc_crc.c:513:
Last errno: 0, Success
Test requirement: (!(!strstr(buf, "unsupported by this chipset") &&
!strstr(buf, "disabled per module param") && !strstr(buf, "disabled per chip
default")))
FBC not supported/enabled
Subtest page_flip: SKIP
Subtest mmap_cpu: SKIP
Subtest mmap_gtt: SKIP
Subtest blt: SKIP
Subtest render: SKIP
Subtest context: SKIP
Subtest page_flip_and_mmap_cpu: SKIP
Subtest page_flip_and_mmap_gtt: SKIP
Subtest page_flip_and_blt: SKIP
Subtest page_flip_and_render: SKIP
Subtest page_flip_and_context: SKIP
==Reproduce steps==
----------------------------
1. ./kms_fbc_crc
==Bisect results==
----------------------------
Bisect shows: 0368920e51ae0cded0eb518c340a4dd17764d461 is the first bad commit
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
AuthorDate: Fri Jun 6 10:37:11 2014 +0100
Commit: Jani Nikula <<a href="mailto:jani.nikula@intel.com">jani.nikula@intel.com</a>>
CommitDate: Wed Jun 11 11:06:43 2014 +0300
drm/i915: Disable FBC by default also on Haswell and later
It causes black screen on bootup and is approximately 100x slower than
running with FBC disabled, so the GPU runs at a high frequency for much
longer - completely contrary to the power saving claims. It also still
has mutex deadlocks in multi-head scenarios, which can lead to a
system/X lockup. These bugs were known before FBC was enabled by default
on Haswell and still have not been fixed.
Bugzilla: <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - i915_enable_fbc != 0 for HD Graphics 5000"
href="show_bug.cgi?id=79716">https://bugs.freedesktop.org/show_bug.cgi?id=79716</a>
Reported-and-tested-by: Jon Kristensen <<a href="mailto:info@jonkri.com">info@jonkri.com</a>>
Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Reviewed-by: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
Cc: <a href="mailto:stable@vger.kernel.org">stable@vger.kernel.org</a>
[Jani: update subject to reflect the actual change]
Signed-off-by: Jani Nikula <<a href="mailto:jani.nikula@intel.com">jani.nikula@intel.com</a>></pre>
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