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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 - bisected: i915 SNB modeset crash in ac9b8236551d1177fd07b56aef9b565d1864420d"
href="https://bugs.freedesktop.org/show_bug.cgi?id=93608">93608</a>
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</tr>
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<th>Summary</th>
<td>bisected: i915 SNB modeset crash in ac9b8236551d1177fd07b56aef9b565d1864420d
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>medium
</td>
</tr>
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<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>mroos@linux.ee
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<pre>Created <span class=""><a href="attachment.cgi?id=120833" name="attach_120833" title="good dmesg with debug">attachment 120833</a> <a href="attachment.cgi?id=120833&action=edit" title="good dmesg with debug">[details]</a></span>
good dmesg with debug
This is a followon to meiling list bug report with subject
bisected: i915 modeset broken in ac9b8236551d1177fd07b56aef9b565d1864420d
Between 4.4-rc3 and 4.4-rc4, i915 modesetting broke on my i5-2400 PC.
Instead of seeing the new dense graphics mode, I see the last VGA text
lines and no X appears either.
I saw something similar on I865G but have not had time to check if it is
the same issue.
ac9b8236551d1177fd07b56aef9b565d1864420d is the first bad commit
commit ac9b8236551d1177fd07b56aef9b565d1864420d
Author: Ville Syrjälä <<a href="mailto:ville.syrjala@linux.intel.com">ville.syrjala@linux.intel.com</a>>
Date: Fri Nov 27 18:55:26 2015 +0200
drm/i915: Introduce a gmbus power domain
Currently the gmbus code uses intel_aux_display_runtime_get/put in an
effort to make sure the hardware is powered up sufficiently for gmbus.
That function only takes the runtime PM reference which on VLV/CHV/BXT
is not enough. We need the disp2d/pipe-a well on VLV/CHV and power well
2 on BXT. So add a new power domnain for gmbus and kill off the now
unused intel_aux_display_runtime_get/put. And change
intel_hdmi_set_edid() to use the gmbus power domain too since that's all
we need there.
Also toss in a BUILD_BUG_ON() to catch problems if we run out of
bits for power domains. We're already really close to the limit...
[Patrik: Add gmbus string to debugfs output]
Signed-off-by: Ville Syrjälä <<a href="mailto:ville.syrjala@linux.intel.com">ville.syrjala@linux.intel.com</a>>
Reviewed-by: Patrik Jakobsson <<a href="mailto:patrik.jakobsson@linux.intel.com">patrik.jakobsson@linux.intel.com</a>>
[Cherry-picked from drm-intel-next-queued f0ab43e6 (Imre)]
Signed-off-by: Imre Deak <<a href="mailto:imre.deak@intel.com">imre.deak@intel.com</a>>
Link:
<a href="http://patchwork.freedesktop.org/patch/msgid/1448643329-18675-3-git-send-email-imre.deak@intel.com">http://patchwork.freedesktop.org/patch/msgid/1448643329-18675-3-git-send-email-imre.deak@intel.com</a>
Signed-off-by: Jani Nikula <<a href="mailto:jani.nikula@intel.com">jani.nikula@intel.com</a>>
:040000 040000 39379146d7e6dda8a4d5f8781ee3d307cce8c47e
f4f09fae0485ad6263d31d425296fa9cd7de343b M drivers
As per Ville Syrjäläs suggestion, attached are boot logs with drm.debug=0xe.
Monitor is connected via DVI.</pre>
</div>
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