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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - 5.3.11 regression: No RC6 on Kaby Lake"
href="https://bugs.freedesktop.org/show_bug.cgi?id=112315">112315</a>
</td>
</tr>
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<th>Summary</th>
<td>5.3.11 regression: No RC6 on Kaby Lake
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
</tr>
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<th>Version</th>
<td>XOrg git
</td>
</tr>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Keywords</th>
<td>bisected, regression
</td>
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<th>Severity</th>
<td>not set
</td>
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<th>Priority</th>
<td>not set
</td>
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<th>Component</th>
<td>DRM/Intel
</td>
</tr>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>tomi@nomi.cz
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>imre.deak@intel.com, intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>i915 platform</th>
<td>KBL
</td>
</tr></table>
<p>
<div>
<pre>"drm/i915/gen8+: Add RC6 CTX corruption WA"
(d4360736a7c0a6326e3bbdf7d41181f6ed03d9a6) in 5.3 stable broke RC6 on my Kaby
Lake ThinkPad 25 (T470 equiv). This prevents the CPU package from entering
package C-states. Happens every time, no suspend/resume needed. The commit
message suggests suspend/resume may actually help, but that's not the case here
either. No mention of "RC6 context corrupted" in dmesg, but perhaps I need to
set drm.debug?
Reverting the commit fixes the issue.</pre>
</div>
</p>
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