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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [regression] [i915] [SKL] Tearing / flickering on the drm-intel-nightly branch"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97888">97888</a>
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<th>Summary</th>
<td>[regression] [i915] [SKL] Tearing / flickering on the drm-intel-nightly branch
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<th>Product</th>
<td>DRI
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<th>Version</th>
<td>XOrg git
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<th>Hardware</th>
<td>Other
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>normal
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>DRM/Intel
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>mike@fireburn.co.uk
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<pre>I've bisected back to this commit in the drm-intel-nightly branch
05a76d3d6ad1ee9f9814f88949cc9305fc165460 is the first bad commit
commit 05a76d3d6ad1ee9f9814f88949cc9305fc165460
Author: Lyude <<a href="mailto:cpaul@redhat.com">cpaul@redhat.com</a>>
Date: Wed Aug 17 15:55:57 2016 -0400
drm/i915/skl: Ensure pipes with changed wms get added to the state
…
If we're enabling a pipe, we'll need to modify the watermarks on all
active planes. Since those planes won't be added to the state on
their own, we need to add them ourselves.
Signed-off-by: Lyude <<a href="mailto:cpaul@redhat.com">cpaul@redhat.com</a>>
Reviewed-by: Matt Roper <<a href="mailto:matthew.d.roper@intel.com">matthew.d.roper@intel.com</a>>
Cc: <a href="mailto:stable@vger.kernel.org">stable@vger.kernel.org</a>
Cc: Ville Syrjälä <<a href="mailto:ville.syrjala@linux.intel.com">ville.syrjala@linux.intel.com</a>>
Cc: Daniel Vetter <<a href="mailto:daniel.vetter@intel.com">daniel.vetter@intel.com</a>>
Cc: Radhakrishna Sripada <<a href="mailto:radhakrishna.sripada@intel.com">radhakrishna.sripada@intel.com</a>>
Cc: Hans de Goede <<a href="mailto:hdegoede@redhat.com">hdegoede@redhat.com</a>>
Signed-off-by: Maarten Lankhorst <<a href="mailto:maarten.lankhorst@linux.intel.com">maarten.lankhorst@linux.intel.com</a>>
Link:
<a href="http://patchwork.freedesktop.org/patch/msgid/1471463761-26796-6-git-send-email-cpaul@redhat.com">http://patchwork.freedesktop.org/patch/msgid/1471463761-26796-6-git-send-email-cpaul@redhat.com</a>
The symptoms I'm seeing look like tearing at the top of the screen and it's
especially noticeable in Chrome - reverting this commit makes the issue go away
I'll attach the contents of /sys/kernel/debug/dri/0/i915_ddb_info for working
and not-working when I have access to my machine again</pre>
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