Hello,
I found this bug report trying to troubleshoot the same issue - for me,
FreeCAD UI is completely garbled, all menu items, all icons, all other
UI elements are larger than the space allocated for them, resulting in
"create new empty document" icon being cut after 90% of its length,
"open document" after 60% etc. making 4th icon barely visible and rest
completely invisible. Essentially, the UI element graphics is being
drawn into different positions compared to where those elements are
actually placed in the UI.
Since the symptoms were the same for me - no issue for clean slate
system user - I tried the strace approach. But even after filtering
things that are the same out, I was unsuccessful. However, using the
QT_SCALE_FACTOR=1 QT_AUTO_SCREEN_SCALE_FACTOR=0 variables made the thing
work and eventually I figured out the problem is caused by my monitor
DPI settings (xfce4-settings-manager -> Appearance -> Fonts -> Custom
DPI settings)
I have this value set to 80. Tried changing it to "default" 96 and that
fixed the issue for me.
I would say this is a FreeCAD bug though, according to my x.org log, my
monitor does have 80DPI:
(++) RADEON(0): DPI set to (80, 80)
(The monitor has 59.6x33.6cm screen dimensions with 1920x1080
resolution, which also amounts to 80DPI.)
As far as I know (was told once by some develeper), developers tend to
assume that every monitor has 96DPI and write programs accordingly.
Might be the case here.
