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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 - High cpu usage during trackpoint scrolling."
href="https://bugs.freedesktop.org/show_bug.cgi?id=99439">99439</a>
</td>
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<th>Summary</th>
<td>High cpu usage during trackpoint scrolling.
</td>
</tr>
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<th>Product</th>
<td>Wayland
</td>
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<th>Version</th>
<td>unspecified
</td>
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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>
</tr>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>libinput
</td>
</tr>
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<th>Assignee</th>
<td>wayland-bugs@lists.freedesktop.org
</td>
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<th>Reporter</th>
<td>pinguin255@gmail.com
</td>
</tr></table>
<p>
<div>
<pre>When I use scrolling with trackpoint+3 mouse in Telegram (version 1.0)
messaging application with libinput driver, cpu goes as high as 70%-80% during
small movements. It only happens with trackpoint+3 mouse, but not with touchpad
while both use smooth scrolling.
To my understanding cpu usage for touchpad and trackpoint smooth scrolling
should be approximately the same for similar movements. So I suspect driver
issue. Also with evdev+synaptics driver cpu usage is also significantly less
(around 20%) for both devices. Only two of my applications use smooth scrolling
intensively: chromium and telegram, but I have problems only with telegram.
Distro: Ubuntu 16.04
DE: Xfce 4.12
Graphical server: Xorg 1.18
libinput 1.2.3
xserver-xorg-input-libinput 0.18.0</pre>
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