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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 - [CYT] i915 full powersave not entered if no connector attached"
href="https://bugs.freedesktop.org/show_bug.cgi?id=98527">98527</a>
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<th>Summary</th>
<td>[CYT] i915 full powersave not entered if no connector attached
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>DRM/Intel
</td>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>f.s.e@outlook.de
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=127659" name="attach_127659" title="hdmi attached">attachment 127659</a> <a href="attachment.cgi?id=127659&action=edit" title="hdmi attached">[details]</a></span>
hdmi attached
Hi,
with 4.9.0-040900rc2-generic and video=DP-1:d video=DP-2:d video=HDMI-A-1:d
video=HDMI-A-2:d and no efifb and no hdmi attached, i915 does not seem to enter
a low powersave state: attachment hdmi_attached
Same setup, but with hdmi attached (gives me the efifb) and it will enter the
low powersave state, which remains even if I detach the hdmi after boot:
attachment hdmi_unattached
I am not sure this is due to the efifb present, or the HDMI present, because
settings are otherwise identical.
The difference in power is 0.3watt.
Thanks,
Fred</pre>
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