On Mon, 19 Feb 2018 12:10:02 +0100
Vincent Lefevre <vinc...@vinc17.net> wrote:

> On 2018-02-18 15:25:35 -0300, Lisandro Damián Nicanor Pérez Meyer wrote:
> > wm4, Vincent: can you try setting QT_AUTO_SCREEN_SCALE_FACTOR=0 ?  
> QT_AUTO_SCREEN_SCALE_FACTOR=0 works with -12, just like with -10.
> I suspect that different behaviors are due to the fact that among
> HiDPI cases, screen sizes, DPI's, etc. are different.
> The patch consisted in truncating instead of rounding to nearest,
> so that it might have solved the problem for users where the
> real factor was between 1.5 and 2, thus changed from 2 to 1
> when converted to integer, 1 meaning no HiDPI (for which there
> are no issues) if I understand correctly.
> I suppose that my real factor is between 2 and 2.5, so that truncating
> gives the same result as rounding to nearest. Hence the same behavior.
> I don't know what broke for wm4. "With the patch applied, it scales
> to 1, which is nonsense." is not very meaningful. This is what happens
> for low DPI, for which no issues have been reported.

Maybe I wasn't clear enough, but I have a HiDPI screen, with a scale
factor (as reported by X11) of approximately 1.9. With -12, it reduced
the sizes of windows and GUI elements by half, and no combination of
environment variables made it scale correctly. I suspect there's some
other scaling factoring in somewhere, which somehow controls font sizes.
Now I'm back to -10 (testing), and I won't upgrade it until the patch
is reverted, so no new tests by me.

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