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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - Add thumb detection"
href="https://bugs.freedesktop.org/show_bug.cgi?id=90528">90528</a>
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<th>Summary</th>
<td>Add thumb detection
</td>
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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>Other
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>ASSIGNED
</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>libinput
</td>
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<th>Assignee</th>
<td>wayland-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>peter.hutterer@who-t.net
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<th>Blocks</th>
<td>90526, 90527
</td>
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<p>
<div>
<pre>For a thumb press on the T440s I get an ABS_MT_PRESSURE minimum of 100 to 110
(range [0, 255]), with the first one or sometimes two events being in the
80-100 range. Finger data is in the 60-90 range.
On an X220t, the thumb pressure is all over the place. This touchpad is quite
small, so the only way to use a thumb here is to only partially touch the
touchpad, so most thumb presses are actually in the 30-60 range.
Finger data is in the 50-90 range.
Based on those two touchpads: what may work is having a zone on the touchpad,
similar to touchpad buttons to label a thumb (or at least increase confidence
that it is a thumb).
We may need to limit thumb detection to certain touchpads over a specific size.</pre>
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</p>
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