A Possibly Qt Bug of HiDPI Detection
Currently, there may be a bug in QT that causes the HiDPI detection going wrong. Here is a temporary workaround.
If you are using a normal computer screen but getting a very large qt UI window, you can add following environment to disable this function before running your program.
(A normal UI.)
(A large UI, which is wrong.)
QTAUTOSCREENSCALEFACTOR=0 your_program
or
export QTAUTOSCREENSCALEFACTOR=0 your_program
or
export QTAUTOSCREENSCALEFACTOR=0
your_program
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