On 08/09/2017 10:18 AM, Ed Greshko wrote: > On 08/09/2017 11:03 AM, Frederic Muller wrote: >> Hi! >> >> I run GNOME on a 2560x1440 resolution display where I disabled the "double >> scaling" >> (not sure how it's called). So one pixel is one dot. Unfortunately when >> running Qt >> applications such as VLC for example they autoscale to 1 dot for 4 pixels >> making >> those huge and taking most of my display area. When on dual screen they even >> recognize which screen is HiDPI and therefore automatically scale back on >> the non >> HiDPI screen kind of forcing me to run all my Qt apps on that external >> screen. >> Unfortunately I do not always have an external screen to save me... >> >> So is there a way (like with GNOME) to disable this feature and have Qt apps >> display "normally"? > FYI, this is a guess on my part since I've not had to deal with this issue. > > I think I would look to http://doc.qt.io/qt-5/highdpi.html and see how these > environment variables may be help... > > QT_AUTO_SCREEN_SCALE_FACTOR [boolean] enables automatic scaling, based on the > pixel > density of the monitor. This will not change the size of point sized fonts, > since > point is a physical unit of measure. Multiple screens may get different scale > factors. > QT_SCALE_FACTOR [numeric] defines a global scale factor for the whole > application, > including point sized fonts. > QT_SCREEN_SCALE_FACTORS [list] specifies scale factors for each screen. This > will not > change the size of point sized fonts. This environment variable is mainly > useful for > debugging, or to work around monitors with wrong EDID information(Extended > Display > Identification Data). > Thanks a lot, that worked great! (I thought I tried those before but I guess I didn't do it right). At the end I've created a /etc/profile.d/qt.sh file and inserted this parameter inside: export QT_AUTO_SCREEN_SCALE_FACTOR=0
Very happy now :-) Thank you. Fred
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