[Development] QTBUG-95930 / QTBUG-99546 need some attention

[Ilya Fedin]

On Tue, 10 May 2022 19:40:02 +0000
Morten Sørvig <Morten.Sorvig at qt.io> wrote:

> > On 9 May 2022, at 16:47, Thiago Macieira
> > <thiago.macieira at intel.com> wrote:
> > 
> > On Monday, 9 May 2022 07:07:23 PDT Morten Sørvig wrote:  
> >> b) In practice, QT_SCREEN_SCALE_FACTORS has become a system
> >> setting since it’s being set on behalf of the user. This means the
> >> values should be subject to rounding according to
> >> highDpiScaleFactorRoundingPolicy property, like with other system
> >> DPI settings.  
> > 
> > It it's a system setting, then one should assume it's been set to
> > the exact value that the system wanted it to be. So if they'd
> > wanted it rounded, they'd have rounded it.  
> 
> That is true, however the purpose of highDpiScaleFactorRoundingPolicy
> is override the system setting. For example, a Windows display can be
> configured for 175%,  but the app knows it does not support that and
> has enabled rounding (to 200%). 
> 
> So if QT_SCREEN_SCALE_FACTORS is considered a system setting then
> this is an inconsistency  in behavior.

So, what's the decision? Is it a bug in Qt or in KDE?