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<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - Trackpoint speed lock"
href="https://bugs.freedesktop.org/show_bug.cgi?id=93448#c13">Comment # 13</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - Trackpoint speed lock"
href="https://bugs.freedesktop.org/show_bug.cgi?id=93448">bug 93448</a>
from <span class="vcard"><a class="email" href="mailto:mail@flherne.uk" title="Francis Herne <mail@flherne.uk>"> <span class="fn">Francis Herne</span></a>
</span></b>
<pre>Similar behaviour can be caused by the auto-calibration feature of the BIOS.
If you hold the trackpoint in a fixed position for a moment (most commonly
while scrolling), it will decide that point is the centre. Releasing the
trackpoint will then cause an uncontrolled movement in the opposite direction
until it recalibrates.
By default, the timeout is 0.5s, which is (IME) rather too low and causes
miscalibrations during normal use.
Try writing to /sys/devices/platform/i8042/serio1/serio2/drift_time (in units
of 0.1s), and see if it's any better or at least noticeably different. `20`
(2s) seems like a good number for me.</pre>
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