FAQ/Linux: Reword libinput smoothing fix section

OpenTabletDriver v0.6.5.0 now ships with the libinput smoothing disabled in packaging. This commit
adds details for how to check whether this is applied correctly, but also keeps pre-v0.6.5.0
instructions intact for users still on that version.

Author: gonX

site/_wiki/FAQ/Linux.md

@@ -129,9 +129,29 @@ otd-daemon
 
 ## The cursor feels slow on Artist Mode {#libinput-smoothing}
 
-Using Artist Mode will result in some minor smoothing due to libinput's tablet handling.
+If you are using a release version of OpenTabletDriver v0.6.4.0 or older, this
+is expected, and a workaround exists.
 
-To disable this smoothing, add the contents below to `/etc/libinput/local-overrides.quirks`:
+On newer versions, this is fixed in new packaging - please report a bug to your
+packager if the quirks file is not included with your OpenTabletDriver package.
+
+### With OpenTabletDriver Version 0.6.5.0 or newer
+
+Smoothing on the virtual tablet provided by OpenTabletDriver should already be
+disabled via packaging. You can verify that the attribute is set with the
+`liblinput quirks list <path>` command.
+
+Figuring out the path is left as an exercise for the reader, but it is
+typically one of the **newest** (not necessarily highest numbered) `event##`
+device in `/dev/input/`.
+
+### With OpenTabletDriver Version 0.6.4.0 or earlier (and `master`/0.7 branch builds)
+
+With OpenTabletDriver v0.6.4.0 and earlier (and v0.7 builds), using Artist Mode
+will result in some minor smoothing due to libinput's tablet handling, for
+which the quirk is not officially included in packaging.
+
+To disable this smoothing manually, add the contents below to `/etc/libinput/local-overrides.quirks`:
 
 ```ini
 [OpenTabletDriver Virtual Tablet]