Thread: Calibre locks entire machine for 1-2 mins on first startup
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Old 06-17-2015, 03:13 AM   #83
chaley
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Posts: 12,342
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Join Date: Jan 2010
Location: Notts, England
Device: Kobo Libra 2
Quote:
Originally Posted by cybmole View Post
please test safe mode . post #30
that result will be a big clue .
@cybmole: In post #75 he said he did that.

@JeanPaulo: When you booted to safe mode, did you check the "Base video" box?
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According to msconfig help:
Quote:
Base video. On startup, opens the Windows graphical user interface in minimal VGA mode. This loads standard VGA drivers instead of display drivers specific to the video hardware on the computer.
I ask because video cards are an obvious difference between machines as are video driver levels. Calibre before release 2.0 used QT4. It could be that Qt5, the graphics library that calibre uses now, has some graphics call pattern that borks certain cards/drivers. For example, some articles imply that QT5 uses OpenGL more heavily than QT4.
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