Hi > $ calibre the_book_of_wisdom_of_solomon.mobi
(btw, ebook-viewer ...mobi is probably better, it starts the viewer) > libGL error: No matching fbConfigs or visuals found > libGL error: failed to load driver: swrast > Unable to read MTPZ public exponent from ~/.mtpz-data, MTPZ disabled. > qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 1271, > resource id: 15145284, major code: 40 (TranslateCoords), minor code: 0 That is something that is definitely out of the Calibre realm. Something in your GL setup is wrong. You maybe have installed some external drivers at some point in the past (nvidia binary drivers?) or changed something else. I don't really know how to fix these kinds of things remotely. > (ebook-convert works, though.) Yes, it doesn't need Qt library for displaying stuff. Best Norbert -- PREINING Norbert http://www.preining.info Accelia Inc. + IFMGA ProGuide + TU Wien + JAIST + TeX Live + Debian Dev GPG: 0x860CDC13 fp: F7D8 A928 26E3 16A1 9FA0 ACF0 6CAC A448 860C DC13