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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Vertical line corruptions seen on the left side of Gen 9+ display"
href="https://bugs.freedesktop.org/show_bug.cgi?id=106478">106478</a>
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<th>Summary</th>
<td>Vertical line corruptions seen on the left side of Gen 9+ display
</td>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>DRI git
</td>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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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
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>azhar.shaikh@intel.com
</td>
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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
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=139502" name="attach_139502" title="vertical corruption after disabling cursor">attachment 139502</a> <a href="attachment.cgi?id=139502&action=edit" title="vertical corruption after disabling cursor">[details]</a></span>
vertical corruption after disabling cursor
Vertical display corruption is seen on GEN9 and above displays. This issue is
more prominent when using an external display. Attaching the image which shows
the corruption.
There is a patch
(<a href="https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/877396/">https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/877396/</a>
) submitted on chromeos kernel which fixes the issue on chromeos kernels and
even on upstream kernel.
The upstream change which introduced the check is:
commit a5509abda48ecfc133fac6268e83fc1a93dba039
Author: Ville Syrjälä <<a href="mailto:ville.syrjala@linux.intel.com">ville.syrjala@linux.intel.com</a>>
Date: Fri Feb 17 17:01:59 2017 +0200
drm/i915: Fix legacy cursor vs. watermarks for ILK-BDW
There are many updates seen to this part of code which skip the vblank waits
for cursor updates. But looks like we still need the vblank wait(slowpath) on
Gen9+ displays too.
So having the same fix on upstream kernel as the chromeos fix, is a correct
solution here? Will it cause underruns on ILK-BDW? or some other effects?</pre>
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