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Old 06-26-2020, 11:01 PM   #1
martinf
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eBook viewer not opening in Ubuntu 20

Hi, have been looking for a post about this, but apparently I'm the first. Yesterday I was tweaking with folders at /etc/apt and some other stuff to solve an epson printer problem. Today calibre's eBook viewer doesn't work

I reinstalled the viewer, but still. Calibre does open all formats that I haven't selected to be opened by eBook viewer, but those that have been don't. For example pdfs are opened by the document viewer, but mobis and epubs don't open. No error message appears.

Any ideas? any libraries that I might have accidentally uninstalled that made it work?

Thanks
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Old 06-26-2020, 11:10 PM   #2
martinf
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Run the calibre-debug --viewer this is what I got...

calibre-debug --viewer
Turning on automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 96.0 x 96.0
physicalDpi: 141.7674418604651 x 141.4020618556701
Using calibre Qt style: True
WebEngineContext used before QtWebEngine::initialize() or OpenGL context creation failed.
Failed to create OpenGL context for format QSurfaceFormat(version 2.0, options QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize 24, redBufferSize -1, greenBufferSize -1, blueBufferSize -1, alphaBufferSize -1, stencilBufferSize 8, samples 0, swapBehavior QSurfaceFormat:efaultSwapBehavior, swapInterval 1, colorSpace QSurfaceFormat:efaultColorSpace, profile QSurfaceFormat::NoProfile)
Aborted (core dumped)

Hope this helps in helping me

Thanks
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Old 06-26-2020, 11:45 PM   #3
kovidgoyal
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That's an issue with your opengl drivers, basically Qt is usable to create an OpenGL context.
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Old 06-27-2020, 12:41 AM   #4
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ok, i'll check into that. Thanks for the quick reply and congratulations for the amazing work. Calibre is great!
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