Calibre 9.13 fixes ebook search that wasn’t working in the content server

A new bug-fix release of Calibre, the open-source e-book manger, view and converter, is available for download. Calibre 9.13 resolves a number of PDF-related issues, including one for Linux distributions that ship an ‘ancient’ version of the libxml2 library. To avoid errors that could cause when converting PDFs on Linux, Calibre now preloads its html5-parser library. A comment in the file explains: “QtWebEngineProcess on some ancient Linux systems probes for GPU backends which loads swrast_dri.so which links against system libxml2, which overwrites or global libxml2 symbols. So we preload lxml and html5_parser as a workaround. Thankfully this is basically only […]
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https://www.omgubuntu.co.uk/2026/08/calibre-9-13-bug-fix-update