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Old 07-15-2017, 12:08 PM   #2
kovidgoyal
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Posts: 45,380
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Join Date: Oct 2006
Location: Mumbai, India
Device: Various
See the line:

devicePixelRatio: 3.0

Qt thinks the device pixel ratio for your screen should be 3, which is almost certainly incorrect.

Either set the correct Xft.dpi resource or turn off automatic scaling in the calibre preferences->Look & Feel
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