Comment # 24 on bug 1123424 from Fabian Vogt

(In reply to Stefan Hundhammer from comment #23)
> (In reply to Fabian Vogt from comment #21)
> > (In reply to Stefan Hundhammer from comment #19)
> > > tux@g1:~> xrdb -query | grep Xft
> > > Xft.dpi:	120.9599609375
> > 
> > This seems to be the culprit to me.
> > Does it work after running "echo Xft.dpi: 120 | xrdb -nocpp -merge"?
> 
> Right; that fixes the problem indeed, both for QDirStat and for the YaST Qt
> control center.

Ok, that confirms that the root cause is GNOME not rounding Xft.dpi.

> > If that's not enough, does
> > "QT_LOGGING_RULES=qt.qpa.screen.debug=true QT_FONT_DPI=120 qdirstat" work?
> 
> I tried this first (to leave the X resources undisturbed before changing
> them for the running X server with the "xrdb" command) and I can confirm
> that this also works.

Regarding the "QDpi(inf, inf)" issue - does that still appear if "Xft.dpi" is
set to a valid integer? If so, can you give me access to the VM you saw it on?