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<base href="https://bugs.freedesktop.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Cursor flickering on switching between cursor types"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108832">108832</a>
</td>
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<th>Summary</th>
<td>Cursor flickering on switching between cursor types
</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>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
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<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/AMDgpu
</td>
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>marlock9@gmail.com
</td>
</tr></table>
<p>
<div>
<pre>Copy of <a href="https://bugs.kde.org/show_bug.cgi?id=400097">https://bugs.kde.org/show_bug.cgi?id=400097</a>
Creating bug here because with help of KDE developer I have investigated it is
amdgpu bug.
For example, I'm moving cursor arrow on text. Before it turns to "I" for text
selecting I clearly see the intermediate cursor texture (can't see what type is
it) located right or left from current cursor position. Same when I moving
cursor arrow to the border of screen to resize. It looks like glitch or
flickering.
It's lasting for about 2 years on different distributions.
<a href="https://drive.google.com/file/d/1bV7okri0I95tkCOqo-6Z-axnN3-BXk9U/view?usp=sharing">https://drive.google.com/file/d/1bV7okri0I95tkCOqo-6Z-axnN3-BXk9U/view?usp=sharing</a>
Above is link to a slo-mo video. You can clearly see what's happening when I'm
moving cursor straight down from text:
1. "I" cursor
2. Arrow cursor appears 5 px left from "I" cursor
3. Arrow cursor leaps to the 15 px right-down diagonal
On the monitor it looks like flickering jumping of cursor.
amdgpu 18.0.1
libdrm-amdgpu1 2.4.91
linux 4.19.0
Radeon RX 570.
So, kde developer said:
"The issue is very likely in the video drivers, possibly not correctly
syncronizing cursor position and cursor shape updates. I suggest to report it
to the developers of your video drivers (your distribution might help to locate
these)."
Finally, I have some experiments with video driver settings and I have no
issues with such options in 20-amdgpu.conf:
Option "SWcursor" "true"
Option "TearFree" "true"
Truly said, only enabling SWcursor is enough for get rid of this bug but right
after appears so much tearing (due to "KMS Pageflipping: disabled because of
SWcursor" I suggest) so I needed to enable TearFree.</pre>
</div>
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