03-30-2025, 07:10 PM
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#1 |
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Junior Member
 Posts: 4
Karma: 10
Join Date: Mar 2025
Device: kobo ereader
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eBook Viewer not displaying math equations
While some simple mathematical formulae do display, many do not, although I know they're there since a greyed-out placeholder label "math" is shown and the surrounding text does indicate clearly there should be a formula there. Also, a little popup at the bottom left of the viewer window says "processing math: 0%" without progressing to a higher percentage on any reasonable time scale. I presume this means that MathJax is not working on my installation, which otherwise seems just fine. Using calibre 7.26 from FlatHub running on Ubuntu 24.04 LTS. Any advice on how to fix or at least trouble shoot this will be appreciated. Otherwise I guess I'll update to the latest Ubuntu version and see if that works ...
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03-30-2025, 07:25 PM
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#2 |
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Junior Member
Posts: 4
Karma: 10
Join Date: Mar 2025
Device: kobo ereader
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OK, I updated to 8.1.1 directly from the calibre web site, and it still doesn't work exactly as described above. So it's not a question of version, apparently.
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03-30-2025, 07:47 PM
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#3 |
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Junior Member
Posts: 4
Karma: 10
Join Date: Mar 2025
Device: kobo ereader
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This time I did notice, however, that before the "processing math: 0%" message popped up, a longer message was displayed for about 2 sec, which although I could not read it that fast seemed to say that something in "internal.sandbox/OPS/mathjax/jax/output" failed to load. I tried installing node-mathjax-full/noble using the Ubuntu "apt" package manager, but that didn't help.
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03-30-2025, 08:01 PM
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#4 | |
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Junior Member
Posts: 4
Karma: 10
Join Date: Mar 2025
Device: kobo ereader
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Quote:
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03-30-2025, 11:10 PM
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#5 |
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creator of calibre
 
Posts: 45,318
Karma: 27111242
Join Date: Oct 2006
Location: Mumbai, India
Device: Various
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Do not use distro packages, flathub builds and so on. Use only the official binaries from https://calibre-ebook.com/download_linux
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| calibre, equations in epubs, math, mathjax |
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