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<body><span class="vcard"><a class="email" href="mailto:peter.hutterer@who-t.net" title="Peter Hutterer <peter.hutterer@who-t.net>"> <span class="fn">Peter Hutterer</span></a>
</span> changed
<a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - One-finger movement on touchpad registered as two-finger scrolling with edge exclusion zone is touched"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103208">bug 103208</a>
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<table border="1" cellspacing="0" cellpadding="8">
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Depends on</td>
<td>
</td>
<td>95417
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<td style="text-align:right;">Status</td>
<td>NEEDINFO
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<td>ASSIGNED
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<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - One-finger movement on touchpad registered as two-finger scrolling with edge exclusion zone is touched"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103208#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - One-finger movement on touchpad registered as two-finger scrolling with edge exclusion zone is touched"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103208">bug 103208</a>
from <span class="vcard"><a class="email" href="mailto:peter.hutterer@who-t.net" title="Peter Hutterer <peter.hutterer@who-t.net>"> <span class="fn">Peter Hutterer</span></a>
</span></b>
<pre>Linking to <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Disable edge palm detection during 2fg scrolling"
href="show_bug.cgi?id=95417">bug 95417</a> here because we introduced that behaviour there. There is
a problem with 2fg scrolling and edge palm detection: our edge palm detection
triggers when a finger is within the edge zone and either stays there or moves
vertically within that zone. see this link for an illustration of the process:
<a href="http://wayland.freedesktop.org/libinput/doc/latest/palm_detection.html">http://wayland.freedesktop.org/libinput/doc/latest/palm_detection.html</a>
for 2-finger scrolling, the vertical motion is almost guaranteed. especially on
small touchpads (but not exclusively so), having one finger in the edge zone is
not that uncommon. so we purposely ignore palm edge fingers for 2-finger
scrolling and treat the finger normally.
Not sure what to do here, having this as a hardware-specific exception would
make this a lot harder to maintain.</pre>
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<div id="referenced">
<hr style="border: 1px dashed #969696">
<b>Referenced Bugs:</b>
<ul>
<li>
[<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Disable edge palm detection during 2fg scrolling"
href="https://bugs.freedesktop.org/show_bug.cgi?id=95417">Bug 95417</a>] Disable edge palm detection during 2fg scrolling
</li>
</ul>
</div>
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