Re: GUI scaling rendered KDevelop useless on Windows 10

Ingvar Tj=F8stheim wrote on 20210916::05:53:04 re: "RE: GUI scaling ren=
dered KDevelop useless on Windows 10"

(bouncing this back to the list)

>As KDevelop GUI scaling had enlarged before I got here, it remained th=
is way as I connected here and switched monitors. I do not know if it w=
orsened, but it has not reappeared yet.

Do you mean the issue is back already? How do you handle the suspend/co=
mmute/wake cycle? Do you disconnect the one dock before you suspend the=
 computer and connect the other after you wake the computer? That seems=
 the safer route . I used to do the opposite with the external screens =
on my Mac (not via a dock) and that went fine with older (=3D graphical=
ly simpler) versions of the OS until it no longer did.

>I will try to find out whether it is easier to reproduce at home, as I=
 have not been able to do so here.
>When switching between monitors here, Windows 10 does scale all GUI, s=
o I would think the problem could appear here too.

You say the monitor at work has a lower resolution, is it maybe one tha=
t wouldn't qualify as a "high dpi" screen?

Here's what Qt wants us to know about DPI scaling (have fun!) :
https://doc.qt.io/qt-5/highdpi.html

From there, things you can try when the issue returns:
- start KDevelop with a specific `dpiawareness`
- start KDevelop with one of QT_AUTO_SCREEN_SCALE_FACTOR/QT_SCALE_FACTO=
R/QT_SCREEN_SCALE_FACTORS set in the MSWin environment
- start KDevelop using the Fusion style (the "native" MSWin style appar=
ently has some issues with highdpi scaling).

Points 1 and 3 can be done via a qt.conf file (I think in the directory=
 where KDevelop is installed; see https://doc.qt.io/qt-5/qt-conf.html),=
 environment variables (like QT_SCREEN_SCALE_FACTORS) would apply to al=
l Qt applications.

NB: that doc does state that monitors can have incorrect EDID informati=
on - but I think you'd be seeing the issue all the time if that were th=
e case ... although that's also the kind of information that *might* be=
 cached by an OS and become corrupted, esp. when you're swapping extern=
al displays regularly.

R.