[okular] [Bug 401339] presentation: odd scaling/anti aliasing

[Dr. David Alan Gilbert (rh)]

https://bugs.kde.org/show_bug.cgi?id=401339

--- Comment #6 from Dr. David Alan Gilbert (rh) <dgilbert at redhat.com> ---
(In reply to Albert Astals Cid from comment #5)
> Probably getting confused by two screens with different pixel densities.

Possibly; for reference the physical devices are the ~15" LCD HD in the T530
laptop, and a ~28" LCD uHD in the external Dell S2817Q monitor.
xrandr says:

Screen 0: minimum 320 x 200, current 5760 x 2160, maximum 8192 x 8192
LVDS-1 connected 1920x1080+0+1080 (normal left inverted right x axis y axis)
344mm x 193mm
   1920x1080     60.02*+  60.01    59.97    59.96    50.03    59.93  
   1680x1050     59.95    59.88  
   1400x1050     59.98  
   1600x900      59.99    59.94    59.95    59.82  
   1280x1024     60.02  
   1400x900      59.96    59.88  
   1280x960      60.00  
   1440x810      60.00    59.97  
   1368x768      59.88    59.85  
   1280x800      59.99    59.97    59.81    59.91  
   1280x720      60.00    59.99    59.86    59.74  
   1024x768      60.04    60.00  
   960x720       60.00  
   928x696       60.05  
   896x672       60.01  
   1024x576      59.95    59.96    59.90    59.82  
   960x600       59.93    60.00  
   960x540       59.96    59.99    59.63    59.82  
   800x600       60.00    60.32    56.25  
   840x525       60.01    59.88  
   864x486       59.92    59.57  
   700x525       59.98  
   800x450       59.95    59.82  
   640x512       60.02  
   700x450       59.96    59.88  
   640x480       60.00    59.94  
   720x405       59.51    58.99  
   684x384       59.88    59.85  
   640x400       59.88    59.98  
   640x360       59.86    59.83    59.84    59.32  
   512x384       60.00  
   512x288       60.00    59.92  
   480x270       59.63    59.82  
   400x300       60.32    56.34  
   432x243       59.92    59.57  
   320x240       60.05  
   360x202       59.51    59.13  
   320x180       59.84    59.32  
VGA-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-1 connected 3840x2160+1920+0 (normal left inverted right x axis y axis)
621mm x 341mm
   3840x2160     29.98* 
   1920x2160     59.99  
   2560x1440     59.95  
   2048x1280     59.92  
   1920x1080     60.00    60.00    50.00    59.94    24.00    23.98  
   1920x1080i    60.00    50.00    59.94  
   1600x1200     60.00  
   1280x1024     75.02    60.02  
   1280x800      59.81  
   1152x864      75.00  
   1280x720      60.00    50.00    59.94  
   1024x768      75.03    60.00  
   800x600       75.00    60.32  
   720x576       50.00    50.00  
   720x480       60.00    60.00    59.94    59.94  
   640x480       75.00    60.00    59.94    59.94  
   720x400       70.08

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