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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Lenovo T440p - slow fine touchpad movement makes cursor jump"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105640#c7">Comment # 7</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Lenovo T440p - slow fine touchpad movement makes cursor jump"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105640">bug 105640</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>Did you notice any changes in the behaviour with the patch applied? Looking at
this latest recording, there are two categories of jumps:
6.735493: | *********** | *********** | *********** |
*********** |
6.745580: | *********** | *********** | *********** |
*********** |
6.796415: | *********** | *********** | *********** |
*********** |
6.826930: | *********** | *********** | *********** |
*********** |
6.897885: | *********** | *********** | *********** |
*********** |
6.907994: | *********** | *********** | *********** |
*********** |
6.928296: →↘ 20/ 3 | *********** | *********** | *********** |
*********** |
6.938448: ↙↓ -1/ 3 | *********** | *********** | *********** |
*********** |
6.948594: ↓↘ 1/ 3 | *********** | *********** | *********** |
*********** |
i.e. lots of nothings, then a jump, then normal motion. This type of jump
should be fixed with the bug.
5.101908: | *********** | *********** | *********** |
*********** |
5.152933: | *********** | *********** | *********** |
*********** |
5.162819: | *********** | *********** | *********** |
*********** |
5.213504: →↘ 20/ 3 | *********** | *********** | *********** |
*********** |
5.233803: →↗ 20/ -1 | *********** | *********** | *********** |
*********** |
5.243927: →↘ 20/ 1 | *********** | *********** | *********** |
*********** |
5.264403: →↘ 1/ 1 | *********** | *********** | *********** |
*********** |
i.e. lots of nothings, then *multiple* jumps, in this case three. There's
another one with three jumps of 17 as well but the recording in the other bug
had 2 and 4 events as well. Problem is: these don't look anything special, we
cannot easily detect those because they're indistinguishable from a real move.
So yeah, I don't really know what to do here.</pre>
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