[Wayland-bugs] [Bug 99961] Wacom tablet produces wiggly bent lines when using libinput driver.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99961

            Bug ID: 99961
           Summary: Wacom tablet produces wiggly bent lines when using
                    libinput driver.
           Product: Wayland
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: libinput
          Assignee: wayland-bugs at lists.freedesktop.org
          Reporter: raghavendr.raghu at gmail.com

Created attachment 129909
  --> https://bugs.freedesktop.org/attachment.cgi?id=129909&action=edit
jpg showing lines drawn with both driver

The lines drawn with wacom pen(Wacom Intuos4 6x9) when libinput is used as
driver are severely bent and wiggly. The same tablet produces smooth result
when xf86-input-wacom is used as driver. In future when libinput becomes the
default driver (if it is planned ) this can cause sever problem for artists
such as myself who use linux.

My uninformed guess is that the averaging of the input coordinates obtained
from wacom is messed up. As a workaround (I don't know if this is correct thing
to do, if no please provide a different work around) I commented the lines:


Section "InputClass"
        Identifier "libinput touchscreen catchall"
        MatchIsTouchscreen "on"
        MatchDevicePath "/dev/input/event*"
       Driver "libinput"
EndSection

In the file /usr/share/X11/xorg.conf.d/40-libinput.conf so that it uses the
wacom driver provided by xf86-input-wacom (0.34.0-1)


Let me know if i can provide any logs or any other information that will be
required to solve this issue.

I am using arch linux with libinput version (while reporting this bug)- 1.6.2-1

My tablet device is is Wacom Intuos4 6x9

I am using krita(3.1 built from git) to test the tablet. I am also attaching a
jpg showing lines drawn with both drivers for a comparison. the sections marked
with pink are bent  sections in the libinput version

Let me know if you want any more details or logs

thank you

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/wayland-bugs/attachments/20170225/c8fae1e2/attachment.html>