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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_ASSIGNED "
title="ASSIGNED --- - [BDW bisected]igt/pm_pc8 subcases cause system hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=77565">bug 77565</a>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEEDINFO
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<td>ASSIGNED
</td>
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<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED --- - [BDW bisected]igt/pm_pc8 subcases cause system hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=77565#c6">Comment # 6</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED --- - [BDW bisected]igt/pm_pc8 subcases cause system hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=77565">bug 77565</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>
<span class="quote">>
> Please try the following branch:
> <a href="https://github.com/ideak/linux/commits/bdw-rc6-rpm-fix">https://github.com/ideak/linux/commits/bdw-rc6-rpm-fix</a></span >
Apply this patch fail, test the patch as below:
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 75c1c76..b1b5fd8 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3262,6 +3262,10 @@ int intel_enable_rc6(const struct drm_device *dev)
if (INTEL_INFO(dev)->gen < 5)
return 0;
+ /* Disable RC6 on Broadwell for now */
+ if (IS_BROADWELL(dev))
+ return 0;
+
/* Respect the kernel parameter if it is set */
if (i915.enable_rc6 >= 0)
return i915.enable_rc6;
The hang still exists.
output:
IGT-Version: 1.6-g78e4c2b (x86_64) (Linux: 3.15.0-rc2_prts_78d88b_20140425
x86_64)
Runtime PM support: 1
PC8 residency support: 1</pre>
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