This is my first post here, let me introduce myself a bit. This year I
finally convinced my wife, a graphic designer, to switch from Windows
and the Adobe suite to Linux Gimp, Inkscape and friends. I never agreed
with RedHat's ways (since long before systemd) so I chose Devuan.

I'm normally an OpenBSD user, but since I haven't used Linux for a while
and considering the major changes that have taken place (including
systemd,) I decided to install Devuan on my desktop machine as well so I
could help my wife in case of any errors.

To anticipate issues, a mouth ago I upgraded my machine to Excalibur and
noticed that with gimp-3.0.4 pressure sensitivity didn't work with our
Wacom tablet.

$ lsusb | grep Wacom
Bus 001 Device 006: ID 056a:00b8 Wacom Co., Ltd PTK-440 [Intuos4 (4x6)]

The bug is not present in gimp-2.10 (which uses GTK-2). I've always
used Gimp and Inkscape but I've never used Wacom tablets, that's my
wife, and she is still getting familiar with these applications. So, I
initially thought it was a Gimp bug and submitted the bug report to
them:

https://gitlab.gnome.org/GNOME/gimp/-/issues/?sort=created_date&state=all&search=input+device&first_page_size=20&show=eyJpaWQiOiIxNDQ2MCIsImZ1bGxfcGF0aCI6IkdOT01FL2dpbXAiLCJpZCI6MjI0MjExfQ%3D%3D

As you can read in that discussion, some guy (Bruno) responded to me
suggesting it was a Devuan specific problem. I responded a bit harshly
at first, but it turned out he was right.

I paste below the same tests I sent to Gimp devs. Notice I also tested
MX, also Debian derivative non-systemd distro where I couldn't reproduce
the bug. These tests made me notice that the bug also affected Inkscape
and MyPaint, and also in Devuan stable, since these two apps use GTK-3.

"No" means that wacom tablet does not appear in the configuration dialog
and pressure sensitivity does not work. "Yes" means everything works as
expected.

Devuan stable (Daedalus)
-----------------------------
(Gimp 2.10 with GTK2    yes)
Inkscape 1.2        No
MyPaint 2.0.1        No
GTK 3.24.38
X11 session

Debian stable (Bookworm)
-----------------------------
(Gimp 2.10 with GTK2    yes)
Inkscape 1.2        Yes
MyPaint 2.0.1        Yes
GTK 3.24.38
X11 session

Debian testing (Trixie)
-----------------------------
Gimp 3.0.4        Yes
Inkscape 1.4        Yes
MyPaint 2.0.1        Yes
GTK 3.24.49
X11 session

Fedora 42
-----------------------------
Gimp 3.0.4        Yes
Inkscape 1.4.2        Yes
MyPaint 2.0.1        Yes
GTK 3.24.38
X11 session

MX-23.6
-----------------------------
Inkscape 1.4.2        Yes
GTK 3.24.38
X11 session

--
Walter