Running Xubuntu 18.04LTS, XFCE 4.12
I have the same issue. and the solution provided by
https://bugzilla.xfce.org/show_bug.cgi?id=11193#c8 (comment 8) does not
fix the problem for GTK3 and other apps. the technique updated by
comment 14 does not fix this either. the fix does not reverse the
direction of scroll in apps. but it does reset/reverse-reverse them for
the ones in which the reverse scroll was working.
to disable the "fix" I did xinput --set-int-prop 8 "libinput Natural
Scrolling Disabled" 8 1 and the system went back to the original state
with reverse scroll for xfce apps working and not working for other apps
xinput device properties
Device 'SynPS/2 Synaptics TouchPad':
Device Enabled (143): 1
Coordinate Transformation Matrix (145): 1.000000, 0.000000, 0.000000,
0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
Device Accel Profile (276): 1
Device Accel Constant Deceleration (277): 2.500000
Device Accel Adaptive Deceleration (278): 1.000000
Device Accel Velocity Scaling (279): 12.500000
Synaptics Edges (299): 1618, 5366, 1356, 4536
Synaptics Finger (300): 25, 30, 0
Synaptics Tap Time (301): 180
Synaptics Tap Move (302): 251
Synaptics Tap Durations (303): 180, 180, 100
Synaptics ClickPad (304): 0
Synaptics Middle Button Timeout (305): 75
Synaptics Two-Finger Pressure (306): 282
Synaptics Two-Finger Width (307): 7
Synaptics Scrolling Distance (308): 114, 114
Synaptics Edge Scrolling (309): 0, 0, 0
Synaptics Two-Finger Scrolling (310): 1, 1
Synaptics Move Speed (311): 1.000000, 1.750000, 0.035014, 0.000000
Synaptics Off (312): 1
Synaptics Locked Drags (313): 0
Synaptics Locked Drags Timeout (314): 5000
Synaptics Tap Action (315): 2, 3, 0, 0, 1, 3, 2
Synaptics Click Action (316): 1, 1, 0
Synaptics Circular Scrolling (317): 0
Synaptics Circular Scrolling Distance (318): 0.100000
Synaptics Circular Scrolling Trigger (319): 0
Synaptics Circular Pad (320): 0
Synaptics Palm Detection (321): 0
Synaptics Palm Dimensions (322): 10, 200
Synaptics Coasting Speed (323): 20.000000, 50.000000
Synaptics Pressure Motion (324): 30, 160
Synaptics Pressure Motion Factor (325): 1.000000, 1.000000
Synaptics Resolution Detect (326): 1
Synaptics Grab Event Device (327): 0
Synaptics Gestures (328): 1
Synaptics Capabilities (329): 1, 0, 1, 1, 1, 1, 1
Synaptics Pad Resolution (330): 76, 44
Synaptics Area (331): 0, 0, 0, 0
Synaptics Noise Cancellation (332): 28, 28
Device Product ID (269): 2, 7
Device Node (268): "/dev/input/event6"
libinput Natural Scrolling Enabled (280):
Apps affected: (no reverse touchpad scroll)
Okular
Evince
Qpdfview
libreoffice writer
chrome (pdf view specifically)
xfce4-terminal ( this was a surprise)
Not affected:
Thunar
PCMan file manager
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https://bugs.launchpad.net/bugs/1368402
Title:
GTK3 apps don't understand natural scrolling in Xubuntu
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