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Old 07-06-2020, 05:21 PM   #1
AlaBill
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Viewer in 4.2 opens with only blank white page

Using Mac OSX Catalina when opening a epub book in Viewer mode I only get a white, blank page with no text. I can go back to the calibre library on my hard disk and open the same epub with a different reader and all is there. Any ideas of what to do?
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Old 07-06-2020, 11:13 PM   #2
kovidgoyal
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Disconnect your external GPU
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Old 07-07-2020, 10:54 AM   #3
AlaBill
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I'm not using an external GPU. It is a new Mac Pro computer.
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Old 07-07-2020, 11:10 AM   #4
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The only known reason for this is using an unsupported/external GPU. If you arent then you can try turning off hardware acceleration, as described here: https://doc.qt.io/qt-5/qtwebengine-debugging.html
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Old 08-01-2020, 07:44 PM   #5
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Quote:
Originally Posted by kovidgoyal View Post
The only known reason for this is using an unsupported/external GPU. If you arent then you can try turning off hardware acceleration, as described here: https://doc.qt.io/qt-5/qtwebengine-debugging.html
Apple has changed something because even disabling gpu in the environment variables doesnt resolve the blank white screen on the latest macos. I even tried the latest beta of calibre - and just get a white screen on opening ebook-viewer

Shaun
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