<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - Default settings are unusable with thinkpad x230 touchpad" href="https://bugs.freedesktop.org/show_bug.cgi?id=89725#c9">Comment # 9</a> on <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - Default settings are unusable with thinkpad x230 touchpad" href="https://bugs.freedesktop.org/show_bug.cgi?id=89725">bug 89725</a> from <a class="email" href="mailto:jwrdegoede@fedoraproject.org" title="Hans de Goede <jwrdegoede@fedoraproject.org>"> Hans de Goede</a> <pre>Hi, (In reply to Benjamin Tissoires from <a href="show_bug.cgi?id=89725#c8">comment #8</a>) > So I got my hand on a x230t, and confirmed the behaviour as Hans said. > Unfortunately, the raw incoming data seems to be correctly transferred to > the user space, and indeed, the X and Y do not change at each report. > > I tried looking into the various configuration options that can control the > touchpad without much success. One last thing which worries me a little bit > is the statement in page 22 of the Synaptics PS/2 interfacing guide > 11-000275-01 Rev B: > "The Synaptics Windows drivers operate the pad in Absolute mode. They use > advanced algorithms to transform the absolute (X, Y, Z) data into smooth > relative cursor motion" > > From what I can tell, this is worked around in software by Windows. Thanks for looking into this, what I find strange and which is why I still think this is a bug in the lower layers is that: 1) The vertical resolution is fine, I know the touchpad has somewhat non 4:3 dimensions, but even accounting for that the horizontal resolution should not be that much worse 2) The horizontal resolution seems to be aprox 1 coordinate jump per mm, that is a resolution of "1" which is really really bad, unheard of bad really. I think we should contact synaptics about this and see what they have to say before we start adding some sort of kludge for this to libinput. Regards, Hans</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>