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Old 07-04-2020, 08:27 PM   #1
rozen
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Join Date: Dec 2010
Location: CA
Device: nook
Segmentation fault on Mint 20
Hi,

I just bought a new Lenove desktop computer and installed Linux Mint 20. I then installed Calibre and the install seemed to terminate correctly. The installation output:

rozen@atlas: ~ > sudo -v && wget -nv -O- https://download.calibre-ebook.com/linux-installer.sh | sudo sh /dev/stdin
[sudo] password for rozen:
2020-07-04 17:15:25 URL:https://download.calibre-ebook.com/linux-installer.sh [31922/31922] -> "-" [1]
Using python executable: /usr/bin/python3
Installing to /opt/calibre
Downloading tarball signature securely...
Using previously downloaded calibre-4.20.0-x86_64.txz
Extracting files to /opt/calibre ...
Extracting application files...
Creating symlinks...
Symlinking /opt/calibre/ebook-device to /usr/bin/ebook-device
Symlinking /opt/calibre/fetch-ebook-metadata to /usr/bin/fetch-ebook-metadata
Symlinking /opt/calibre/lrf2lrs to /usr/bin/lrf2lrs
Symlinking /opt/calibre/markdown-calibre to /usr/bin/markdown-calibre
Symlinking /opt/calibre/ebook-viewer to /usr/bin/ebook-viewer
Symlinking /opt/calibre/calibre-smtp to /usr/bin/calibre-smtp
Symlinking /opt/calibre/ebook-meta to /usr/bin/ebook-meta
Symlinking /opt/calibre/calibre to /usr/bin/calibre
Symlinking /opt/calibre/ebook-polish to /usr/bin/ebook-polish
Symlinking /opt/calibre/lrs2lrf to /usr/bin/lrs2lrf
Symlinking /opt/calibre/ebook-edit to /usr/bin/ebook-edit
Symlinking /opt/calibre/calibre-customize to /usr/bin/calibre-customize
Symlinking /opt/calibre/lrfviewer to /usr/bin/lrfviewer
Symlinking /opt/calibre/calibre-server to /usr/bin/calibre-server
Symlinking /opt/calibre/ebook-convert to /usr/bin/ebook-convert
Symlinking /opt/calibre/calibre-debug to /usr/bin/calibre-debug
Symlinking /opt/calibre/calibre-parallel to /usr/bin/calibre-parallel
Symlinking /opt/calibre/calibredb to /usr/bin/calibredb
Symlinking /opt/calibre/web2disk to /usr/bin/web2disk
Setting up command-line completion...
Installing zsh completion to: /usr/share/zsh/vendor-completions/_calibre
Installing bash completion to: /usr/share/bash-completion/completions/
Setting up desktop integration...
Creating un-installer: /usr/bin/calibre-uninstall
Run "calibre" to start calibre

When I then typed the command calibre:

rozen@atlas: ~ > calibre
Segmentation fault (core dumped)

Checking the version of Python:

rozen@atlas: ~ > python
Python 2.7.18rc1 (default, Apr 7 2020, 12:05:55)
[GCC 9.3.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>>

I have tried uninstalling and reinstalling with the same result.

Calibre has been an integral part of my computing existence for years and I am anxious to continue using it. Any help will be greatly appreciated.

Don
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Old 07-04-2020, 09:34 PM   #2
kovidgoyal
creator of calibre
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Post a backtrace. On systemd based distros that is "echo bt | coredumpctl gdb" on other distros you will need to run under gdb or google for how to get a backtrace.
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Old 07-08-2020, 03:25 PM   #3
rozen
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Posts: 19
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Here is my backtrace:
Code:
           PID: 114629 (FontScanner)
           UID: 1000 (rozen)
           GID: 1000 (rozen)
        Signal: 11 (SEGV)
     Timestamp: Wed 2020-07-08 12:18:32 PDT (43s ago)
  Command Line: /opt/calibre/bin/calibre
    Executable: /opt/calibre/bin/calibre
 Control Group: /user.slice/user-1000.slice/session-c4.scope
          Unit: session-c4.scope
         Slice: user-1000.slice
       Session: c4
     Owner UID: 1000 (rozen)
       Boot ID: df3de7ebe8ed493d855f4e0e8d6419fe
    Machine ID: c4f2d44acf3c4564bf5a66409c42613f
      Hostname: atlas
       Storage: /var/lib/systemd/coredump/core.FontScanner.1000.df3de7ebe8ed493d855f4e0e8d6419fe.114629.1594235912000000000000.lz4
       Message: Process 114629 (FontScanner) of user 1000 dumped core.
                
                Stack trace of thread 114629:
                #0  0x00007f7c4e1d84b6 n/a (libqxcb-glx-integration.so + 0xe4b6)
                #1  0x00007f7c4e1d8ad3 n/a (libqxcb-glx-integration.so + 0xead3)
                #2  0x00007f7c4e1d3d59 n/a (libqxcb-glx-integration.so + 0x9d59)
                #3  0x00007f7c4e23c084 _ZN10QXcbWindow6createEv (libQt5XcbQpa.so.5 + 0x55084)
                #4  0x00007f7c4e22814a _ZNK15QXcbIntegration20createPlatformWindowEP7QWindow (libQt5XcbQpa.so.5 + 0x4114a)
                #5  0x00007f7c5216d4fe _ZN14QWindowPrivate6createEby (libQt5Gui.so.5 + 0x1784fe)
                #6  0x00007f7c50765811 _ZN14QWidgetPrivate6createEv (libQt5Widgets.so.5 + 0x199811)
                #7  0x00007f7c50765ea0 _ZN7QWidget6createEybb (libQt5Widgets.so.5 + 0x199ea0)
                #8  0x00007f7c507716a4 _ZN14QWidgetPrivate10setVisibleEb (libQt5Widgets.so.5 + 0x1a56a4)
                #9  0x00007f7c50e156b4 n/a (QtWidgets.so + 0x1c26b4)
                #10 0x00007f7c50f68398 n/a (QtWidgets.so + 0x315398)
                #11 0x00007f7c5b703a35 PyEval_EvalFrameEx (libpython2.7.so.1.0 + 0x110a35)
                #12 0x00007f7c5b705fbc PyEval_EvalCodeEx (libpython2.7.so.1.0 + 0x112fbc)
                #13 0x00007f7c5b702404 PyEval_EvalFrameEx (libpython2.7.so.1.0 + 0x10f404)
                #14 0x00007f7c5b705fbc PyEval_EvalCodeEx (libpython2.7.so.1.0 + 0x112fbc)
                #15 0x00007f7c5b67ac6c n/a (libpython2.7.so.1.0 + 0x87c6c)
                #16 0x00007f7c5b6482b3 PyObject_Call (libpython2.7.so.1.0 + 0x552b3)
                #17 0x00007f7c5b65a08c n/a (libpython2.7.so.1.0 + 0x6708c)
                #18 0x00007f7c5b6482b3 PyObject_Call (libpython2.7.so.1.0 + 0x552b3)
                #19 0x00007f7c5b6fc087 PyEval_CallObjectWithKeywords (libpython2.7.so.1.0 + 0x109087)
                #20 0x00007f7c5368c1e5 n/a (QtCore.so + 0x1ff1e5)
                #21 0x00007f7c5368c738 n/a (QtCore.so + 0x1ff738)
                #22 0x00007f7c5368c9f0 n/a (QtCore.so + 0x1ff9f0)
                #23 0x00007f7c5368d527 n/a (QtCore.so + 0x200527)
                #24 0x00007f7c53179ae7 n/a (libQt5Core.so.5 + 0x2e0ae7)
                #25 0x00007f7c5317d473 n/a (libQt5Core.so.5 + 0x2e4473)
                #26 0x00007f7c53172323 _ZN7QObject5eventEP6QEvent (libQt5Core.so.5 + 0x2d9323)
                #27 0x00007f7c507308fc _ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent (libQt5Widgets.so.5 + 0x1648fc)
                #28 0x00007f7c50737dd0 _ZN12QApplication6notifyEP7QObjectP6QEvent (libQt5Widgets.so.5 + 0x16bdd0)
                #29 0x00007f7c50fe468e n/a (QtWidgets.so + 0x39168e)
                #30 0x00007f7c53140ca8 _ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent (libQt5Core.so.5 + 0x2a7ca8)
                #31 0x00007f7c5319c1e9 _ZN14QTimerInfoList14activateTimersEv (libQt5Core.so.5 + 0x3031e9)
                #32 0x00007f7c5319ca71 n/a (libQt5Core.so.5 + 0x303a71)
                #33 0x00007f7c53ee8db7 g_main_context_dispatch (libglib-2.0.so.0 + 0x59db7)
                #34 0x00007f7c53ee90c8 n/a (libglib-2.0.so.0 + 0x5a0c8)
                #35 0x00007f7c53ee92ac g_main_context_iteration (libglib-2.0.so.0 + 0x5a2ac)
                #36 0x00007f7c5319ce3c _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt5Core.so.5 + 0x303e3c)
                #37 0x00007f7c5313f532 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5 + 0x2a6532)
                #38 0x00007f7c53148c34 _ZN16QCoreApplication4execEv (libQt5Core.so.5 + 0x2afc34)
                #39 0x00007f7c50f592cb n/a (QtWidgets.so + 0x3062cb)
                #40 0x00007f7c5b703a35 PyEval_EvalFrameEx (libpython2.7.so.1.0 + 0x110a35)
                #41 0x00007f7c5b705fbc PyEval_EvalCodeEx (libpython2.7.so.1.0 + 0x112fbc)
                #42 0x00007f7c5b702404 PyEval_EvalFrameEx (libpython2.7.so.1.0 + 0x10f404)
                #43 0x00007f7c5b705fbc PyEval_EvalCodeEx (libpython2.7.so.1.0 + 0x112fbc)
                #44 0x00007f7c5b702404 PyEval_EvalFrameEx (libpython2.7.so.1.0 + 0x10f404)
                #45 0x00007f7c5b705fbc PyEval_EvalCodeEx (libpython2.7.so.1.0 + 0x112fbc)
                #46 0x00007f7c5b702404 PyEval_EvalFrameEx (libpython2.7.so.1.0 + 0x10f404)
                #47 0x00007f7c5b705fbc PyEval_EvalCodeEx (libpython2.7.so.1.0 + 0x112fbc)
                #48 0x00007f7c5b67ac6c n/a (libpython2.7.so.1.0 + 0x87c6c)
                #49 0x00007f7c5b6482b3 PyObject_Call (libpython2.7.so.1.0 + 0x552b3)
                #50 0x00007f7c5b6fc087 PyEval_CallObjectWithKeywords (libpython2.7.so.1.0 + 0x109087)
                #51 0x00007f7c5bc27529 execute_python_entrypoint (libcalibre-launcher.so + 0x2529)
                #52 0x0000000000400636 n/a (calibre + 0x636)
                #53 0x00007f7c5ba390b3 __libc_start_main (libc.so.6 + 0x270b3)
                #54 0x0000000000400669 n/a (calibre + 0x669)
                
                Stack trace of thread 114636:
                #0  0x00007f7c5b5e0376 futex_wait_cancelable (libpthread.so.0 + 0x10376)
                #1  0x00007f7c46dfe62b n/a (radeonsi_dri.so + 0x47c62b)
                #2  0x00007f7c46dfe23b n/a (radeonsi_dri.so + 0x47c23b)
                #3  0x00007f7c5b5d9609 start_thread (libpthread.so.0 + 0x9609)
                #4  0x00007f7c5bb34103 __clone (libc.so.6 + 0x122103)
                
                Stack trace of thread 114639:
                #0  0x00007f7c5b5e0376 futex_wait_cancelable (libpthread.so.0 + 0x10376)
                #1  0x00007f7c46dfe62b n/a (radeonsi_dri.so + 0x47c62b)
                #2  0x00007f7c46dfe23b n/a (radeonsi_dri.so + 0x47c23b)
                #3  0x00007f7c5b5d9609 start_thread (libpthread.so.0 + 0x9609)
                #4  0x00007f7c5bb34103 __clone (libc.so.6 + 0x122103)
                
                Stack trace of thread 114631:
                #0  0x00007f7c5b5e0376 futex_wait_cancelable (libpthread.so.0 + 0x10376)
                #1  0x00007f7c46dfe62b n/a (radeonsi_dri.so + 0x47c62b)
                #2  0x00007f7c46dfe23b n/a (radeonsi_dri.so + 0x47c23b)
                #3  0x00007f7c5b5d9609 start_thread (libpthread.so.0 + 0x9609)
                #4  0x00007f7c5bb34103 __clone (libc.so.6 + 0x122103)
                
                Stack trace of thread 114637:
                #0  0x00007f7c5b5e0376 futex_wait_cancelable (libpthread.so.0 + 0x10376)
                #1  0x00007f7c46dfe62b n/a (radeonsi_dri.so + 0x47c62b)
                #2  0x00007f7c46dfe23b n/a (radeonsi_dri.so + 0x47c23b)
                #3  0x00007f7c5b5d9609 start_thread (libpthread.so.0 + 0x9609)
                #4  0x00007f7c5bb34103 __clone (libc.so.6 + 0x122103)
                
                Stack trace of thread 114632:
                #0  0x00007f7c5b5e0376 futex_wait_cancelable (libpthread.so.0 + 0x10376)
                #1  0x00007f7c46dfe62b n/a (radeonsi_dri.so + 0x47c62b)
                #2  0x00007f7c46dfe23b n/a (radeonsi_dri.so + 0x47c23b)
                #3  0x00007f7c5b5d9609 start_thread (libpthread.so.0 + 0x9609)
                #4  0x00007f7c5bb34103 __clone (libc.so.6 + 0x122103)
                
                Stack trace of thread 114630:
                #0  0x00007f7c5bb2796f __GI___poll (libc.so.6 + 0x11596f)
                #1  0x00007f7c51ae1c1a n/a (libxcb.so.1 + 0xbc1a)
                #2  0x00007f7c51ae390a xcb_wait_for_event (libxcb.so.1 + 0xd90a)
                #3  0x00007f7c4e24b8b0 n/a (libQt5XcbQpa.so.5 + 0x648b0)
                #4  0x00007f7c52f4c268 n/a (libQt5Core.so.5 + 0xb3268)
                #5  0x00007f7c5b5d9609 start_thread (libpthread.so.0 + 0x9609)
                #6  0x00007f7c5bb34103 __clone (libc.so.6 + 0x122103)
                
                Stack trace of thread 114642:
                #0  0x00007f7c5b5e0376 futex_wait_cancelable (libpthread.so.0 + 0x10376)
                #1  0x00007f7c46dfe62b n/a (radeonsi_dri.so + 0x47c62b)
                #2  0x00007f7c46dfe23b n/a (radeonsi_dri.so + 0x47c23b)
                #3  0x00007f7c5b5d9609 start_thread (libpthread.so.0 + 0x9609)
                #4  0x00007f7c5bb34103 __clone (libc.so.6 + 0x122103)
                
                Stack trace of thread 114640:
                #0  0x00007f7c5b5e0376 futex_wait_cancelable (libpthread.so.0 + 0x10376)
                #1  0x00007f7c46dfe62b n/a (radeonsi_dri.so + 0x47c62b)
                #2  0x00007f7c46dfe23b n/a (radeonsi_dri.so + 0x47c23b)
                #3  0x00007f7c5b5d9609 start_thread (libpthread.so.0 + 0x9609)
                #4  0x00007f7c5bb34103 __clone (libc.so.6 + 0x122103)
                
                Stack trace of thread 114635:
                #0  0x00007f7c5b5e0376 futex_wait_cancelable (libpthread.so.0 + 0x10376)
                #1  0x00007f7c46dfe62b n/a (radeonsi_dri.so + 0x47c62b)
                #2  0x00007f7c46dfe23b n/a (radeonsi_dri.so + 0x47c23b)
                #3  0x00007f7c5b5d9609 start_thread (libpthread.so.0 + 0x9609)
                #4  0x00007f7c5bb34103 __clone (libc.so.6 + 0x122103)
                
                Stack trace of thread 114641:
                #0  0x00007f7c5b5e0376 futex_wait_cancelable (libpthread.so.0 + 0x10376)
                #1  0x00007f7c46dfe62b n/a (radeonsi_dri.so + 0x47c62b)
                #2  0x00007f7c46dfe23b n/a (radeonsi_dri.so + 0x47c23b)
                #3  0x00007f7c5b5d9609 start_thread (libpthread.so.0 + 0x9609)
                #4  0x00007f7c5bb34103 __clone (libc.so.6 + 0x122103)
                
                Stack trace of thread 114643:
                #0  0x00007f7c5b5e0376 futex_wait_cancelable (libpthread.so.0 + 0x10376)
                #1  0x00007f7c46dfe62b n/a (radeonsi_dri.so + 0x47c62b)
                #2  0x00007f7c46dfe23b n/a (radeonsi_dri.so + 0x47c23b)
                #3  0x00007f7c5b5d9609 start_thread (libpthread.so.0 + 0x9609)
                #4  0x00007f7c5bb34103 __clone (libc.so.6 + 0x122103)
                
                Stack trace of thread 114644:
                #0  0x00007f7c5b5e0376 futex_wait_cancelable (libpthread.so.0 + 0x10376)
                #1  0x00007f7c46dfe62b n/a (radeonsi_dri.so + 0x47c62b)
                #2  0x00007f7c46dfe23b n/a (radeonsi_dri.so + 0x47c23b)
                #3  0x00007f7c5b5d9609 start_thread (libpthread.so.0 + 0x9609)
                #4  0x00007f7c5bb34103 __clone (libc.so.6 + 0x122103)
                
                Stack trace of thread 114638:
                #0  0x00007f7c5b5e0376 futex_wait_cancelable (libpthread.so.0 + 0x10376)
                #1  0x00007f7c46dfe62b n/a (radeonsi_dri.so + 0x47c62b)
                #2  0x00007f7c46dfe23b n/a (radeonsi_dri.so + 0x47c23b)
                #3  0x00007f7c5b5d9609 start_thread (libpthread.so.0 + 0x9609)
                #4  0x00007f7c5bb34103 __clone (libc.so.6 + 0x122103)
                
                Stack trace of thread 114645:
                #0  0x00007f7c5b5e0376 futex_wait_cancelable (libpthread.so.0 + 0x10376)
                #1  0x00007f7c46dfe62b n/a (radeonsi_dri.so + 0x47c62b)
                #2  0x00007f7c46dfe23b n/a (radeonsi_dri.so + 0x47c23b)
                #3  0x00007f7c5b5d9609 start_thread (libpthread.so.0 + 0x9609)
                #4  0x00007f7c5bb34103 __clone (libc.so.6 + 0x122103)
                
                Stack trace of thread 114634:
                #0  0x00007f7c5b5e0376 futex_wait_cancelable (libpthread.so.0 + 0x10376)
                #1  0x00007f7c46dfe62b n/a (radeonsi_dri.so + 0x47c62b)
                #2  0x00007f7c46dfe23b n/a (radeonsi_dri.so + 0x47c23b)
                #3  0x00007f7c5b5d9609 start_thread (libpthread.so.0 + 0x9609)
                #4  0x00007f7c5bb34103 __clone (libc.so.6 + 0x122103)
                
                Stack trace of thread 114646:
                #0  0x00007f7c5b5e0376 futex_wait_cancelable (libpthread.so.0 + 0x10376)
                #1  0x00007f7c46dfe62b n/a (radeonsi_dri.so + 0x47c62b)
                #2  0x00007f7c46dfe23b n/a (radeonsi_dri.so + 0x47c23b)
                #3  0x00007f7c5b5d9609 start_thread (libpthread.so.0 + 0x9609)
                #4  0x00007f7c5bb34103 __clone (libc.so.6 + 0x122103)
                
                Stack trace of thread 114633:
                #0  0x00007f7c5b5e0376 futex_wait_cancelable (libpthread.so.0 + 0x10376)
                #1  0x00007f7c46dfe62b n/a (radeonsi_dri.so + 0x47c62b)
                #2  0x00007f7c46dfe23b n/a (radeonsi_dri.so + 0x47c23b)
                #3  0x00007f7c5b5d9609 start_thread (libpthread.so.0 + 0x9609)
                #4  0x00007f7c5bb34103 __clone (libc.so.6 + 0x122103)
                
                Stack trace of thread 114648:
                #0  0x00007f7c5b5e33f4 futex_abstimed_wait_cancelable (libpthread.so.0 + 0x133f4)
                #1  0x00007f7c5b5e34e8 __new_sem_wait_slow (libpthread.so.0 + 0x134e8)
                #2  0x00007f7c5b73ebb8 PyThread_acquire_lock (libpython2.7.so.1.0 + 0x14bbb8)
                #3  0x00007f7c5b6fb9b6 PyEval_RestoreThread (libpython2.7.so.1.0 + 0x1089b6)
                #4  0x00007f7c5b74ce0e n/a (libpython2.7.so.1.0 + 0x159e0e)
                #5  0x00007f7c5b703a35 PyEval_EvalFrameEx (libpython2.7.so.1.0 + 0x110a35)
                #6  0x00007f7c5b702525 PyEval_EvalFrameEx (libpython2.7.so.1.0 + 0x10f525)
                #7  0x00007f7c5b66eba3 n/a (libpython2.7.so.1.0 + 0x7bba3)
                #8  0x00007f7c5b6ffea4 PyEval_EvalFrameEx (libpython2.7.so.1.0 + 0x10cea4)
                #9  0x00007f7c5b66eba3 n/a (libpython2.7.so.1.0 + 0x7bba3)
                #10 0x00007f7c5b6ffea4 PyEval_EvalFrameEx (libpython2.7.so.1.0 + 0x10cea4)
                #11 0x00007f7c5b66eba3 n/a (libpython2.7.so.1.0 + 0x7bba3)
                #12 0x00007f7c5b6ffea4 PyEval_EvalFrameEx (libpython2.7.so.1.0 + 0x10cea4)
                #13 0x00007f7c5b66eba3 n/a (libpython2.7.so.1.0 + 0x7bba3)
                #14 0x00007f7c5b64a16b PyIter_Next (libpython2.7.so.1.0 + 0x5716b)
                #15 0x00007f7c5b64a28a PySequence_Tuple (libpython2.7.so.1.0 + 0x5728a)
                #16 0x00007f7c5b6aeecd n/a (libpython2.7.so.1.0 + 0xbbecd)
                #17 0x00007f7c5b6b5503 n/a (libpython2.7.so.1.0 + 0xc2503)
                #18 0x00007f7c5b6482b3 PyObject_Call (libpython2.7.so.1.0 + 0x552b3)
                #19 0x00007f7c5b701f3a PyEval_EvalFrameEx (libpython2.7.so.1.0 + 0x10ef3a)
                #20 0x00007f7c5b705fbc PyEval_EvalCodeEx (libpython2.7.so.1.0 + 0x112fbc)
                #21 0x00007f7c5b702404 PyEval_EvalFrameEx (libpython2.7.so.1.0 + 0x10f404)
                #22 0x00007f7c5b705fbc PyEval_EvalCodeEx (libpython2.7.so.1.0 + 0x112fbc)
                #23 0x00007f7c5b702404 PyEval_EvalFrameEx (libpython2.7.so.1.0 + 0x10f404)
                #24 0x00007f7c5b702525 PyEval_EvalFrameEx (libpython2.7.so.1.0 + 0x10f525)
                #25 0x00007f7c5b705fbc PyEval_EvalCodeEx (libpython2.7.so.1.0 + 0x112fbc)
                #26 0x00007f7c5b67ac6c n/a (libpython2.7.so.1.0 + 0x87c6c)
                #27 0x00007f7c5b6482b3 PyObject_Call (libpython2.7.so.1.0 + 0x552b3)
                #28 0x00007f7c5b65a08c n/a (libpython2.7.so.1.0 + 0x6708c)
                #29 0x00007f7c5b6482b3 PyObject_Call (libpython2.7.so.1.0 + 0x552b3)
                #30 0x00007f7c5b6fc087 PyEval_CallObjectWithKeywords (libpython2.7.so.1.0 + 0x109087)
                #31 0x00007f7c5b744922 n/a (libpython2.7.so.1.0 + 0x151922)
                #32 0x00007f7c5b73e907 n/a (libpython2.7.so.1.0 + 0x14b907)
                #33 0x00007f7c5b5d9609 start_thread (libpthread.so.0 + 0x9609)
                #34 0x00007f7c5bbGNU gdb (Ubuntu 9.1-0ubuntu1) 9.1
Copyright (C) 2020 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
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Reading symbols from /opt/calibre/bin/calibre...
(No debugging symbols found in /opt/calibre/bin/calibre)
[New LWP 114629]
[New LWP 114636]
[New LWP 114639]
[New LWP 114631]
[New LWP 114637]
[New LWP 114632]
[New LWP 114630]
[New LWP 114642]
[New LWP 114640]
[New LWP 114635]
[New LWP 114641]
[New LWP 114643]
[New LWP 114644]
[New LWP 114638]
[New LWP 114645]
[New LWP 114634]
[New LWP 114646]
[New LWP 114633]
[New LWP 114648]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/opt/calibre/bin/calibre'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007f7c4e1d84b6 in ?? ()
   from /opt/calibre/plugins/xcbglintegrations/libqxcb-glx-integration.so
[Current thread is 1 (Thread 0x7f7c5b471740 (LWP 114629))]
(gdb) #0  0x00007f7c4e1d84b6 in ?? ()
   from /opt/calibre/plugins/xcbglintegrations/libqxcb-glx-integration.so
#1  0x00007f7c4e1d8ad3 in ?? ()
   from /opt/calibre/plugins/xcbglintegrations/libqxcb-glx-integration.so
#2  0x00007f7c4e1d3d59 in ?? ()
   from /opt/calibre/plugins/xcbglintegrations/libqxcb-glx-integration.so
#3  0x00007f7c4e23c084 in QXcbWindow::create() ()
   from /opt/calibre/lib/libQt5XcbQpa.so.5
#4  0x00007f7c4e22814a in QXcbIntegration::createPlatformWindow(QWindow*) const
    () from /opt/calibre/lib/libQt5XcbQpa.so.5
#5  0x00007f7c5216d4fe in QWindowPrivate::create(bool, unsigned long long) ()
   from /opt/calibre/lib/libQt5Gui.so.5
#6  0x00007f7c50765811 in QWidgetPrivate::create() ()
   from /opt/calibre/lib/libQt5Widgets.so.5
#7  0x00007f7c50765ea0 in QWidget::create(unsigned long long, bool, bool) ()
   from /opt/calibre/lib/libQt5Widgets.so.5
#8  0x00007f7c507716a4 in QWidgetPrivate::setVisible(bool) ()
   from /opt/calibre/lib/libQt5Widgets.so.5
#9  0x00007f7c50e156b4 in ?? ()
   from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtWidgets.so
#10 0x00007f7c50f68398 in ?? ()
   from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtWidgets.so
#11 0x00007f7c5b703a35 in PyEval_EvalFrameEx ()
   from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#12 0x00007f7c5b705fbc in PyEval_EvalCodeEx ()
   from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#13 0x00007f7c5b702404 in PyEval_EvalFrameEx ()
   from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#14 0x00007f7c5b705fbc in PyEval_EvalCodeEx ()
   from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#15 0x00007f7c5b67ac6c in ?? ()
   from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#16 0x00007f7c5b6482b3 in PyObject_Call ()
   from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#17 0x00007f7c5b65a08c in ?? ()
   from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#18 0x00007f7c5b6482b3 in PyObject_Call ()
   from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#19 0x00007f7c5b6fc087 in PyEval_CallObjectWithKeywords ()
   from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#20 0x00007f7c5368c1e5 in ?? ()
   from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtCore.so
#21 0x00007f7c5368c738 in ?? ()
   from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtCore.so
#22 0x00007f7c5368c9f0 in ?? ()
   from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtCore.so
#23 0x00007f7c5368d527 in ?? ()
   from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtCore.so
#24 0x00007f7c53179ae7 in ?? () from /opt/calibre/lib/libQt5Core.so.5
#25 0x00007f7c5317d473 in ?? () from /opt/calibre/lib/libQt5Core.so.5
#26 0x00007f7c53172323 in QObject::event(QEvent*) ()
   from /opt/calibre/lib/libQt5Core.so.5
#27 0x00007f7c507308fc in QApplicationPrivate::notify_helper(QObject*, QEvent*)
    () from /opt/calibre/lib/libQt5Widgets.so.5
#28 0x00007f7c50737dd0 in QApplication::notify(QObject*, QEvent*) ()
   from /opt/calibre/lib/libQt5Widgets.so.5
#29 0x00007f7c50fe468e in ?? ()
   from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtWidgets.so
#30 0x00007f7c53140ca8 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
    () from /opt/calibre/lib/libQt5Core.so.5
#31 0x00007f7c5319c1e9 in QTimerInfoList::activateTimers() ()
   from /opt/calibre/lib/libQt5Core.so.5
#32 0x00007f7c5319ca71 in ?? () from /opt/calibre/lib/libQt5Core.so.5
#33 0x00007f7c53ee8db7 in g_main_context_dispatch ()
   from /opt/calibre/lib/libglib-2.0.so.0
#34 0x00007f7c53ee90c8 in ?? () from /opt/calibre/lib/libglib-2.0.so.0
#35 0x00007f7c53ee92ac in g_main_context_iteration ()
   from /opt/calibre/lib/libglib-2.0.so.0
#36 0x00007f7c5319ce3c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /opt/calibre/lib/libQt5Core.so.5
#37 0x00007f7c5313f532 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /opt/calibre/lib/libQt5Core.so.5
#38 0x00007f7c53148c34 in QCoreApplication::exec() ()
   from /opt/calibre/lib/libQt5Core.so.5
#39 0x00007f7c50f592cb in ?? ()
   from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtWidgets.so
#40 0x00007f7c5b703a35 in PyEval_EvalFrameEx ()
   from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#41 0x00007f7c5b705fbc in PyEval_EvalCodeEx ()
   from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#42 0x00007f7c5b702404 in PyEval_EvalFrameEx ()
   from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#43 0x00007f7c5b705fbc in PyEval_EvalCodeEx ()
   from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#44 0x00007f7c5b702404 in PyEval_EvalFrameEx ()
   from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#45 0x00007f7c5b705fbc in PyEval_EvalCodeEx ()
   from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#46 0x00007f7c5b702404 in PyEval_EvalFrameEx ()
   from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#47 0x00007f7c5b705fbc in PyEval_EvalCodeEx ()
   from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#48 0x00007f7c5b67ac6c in ?? ()
   from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#49 0x00007f7c5b6482b3 in PyObject_Call ()
   from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#50 0x00007f7c5b6fc087 in PyEval_CallObjectWithKeywords ()
   from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#51 0x00007f7c5bc27529 in execute_python_entrypoint ()
   from /opt/calibre/lib/libcalibre-launcher.so
#52 0x0000000000400636 in ?? ()
#53 0x00007f7c5ba390b3 in __libc_start_main (main=0x400600, argc=1, 
    argv=0x7ffeb2745ef8, init=<optimized out>, fini=<optimized out>, 
    rtld_fini=<optimized out>, stack_end=0x7ffeb2745ee8)
    at ../csu/libc-start.c:308
#54 0x0000000000400669 in ?? ()
(gdb) quit
34103 __clone (libc.so.6 + 0x122103)
I am running Linux Mint 20 with Xfce 4.41
Last edited by issybird; 07-08-2020 at 03:35 PM. Reason: Added code tags.
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Old 07-08-2020, 10:30 PM   #4
kovidgoyal
creator of calibre
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That's a crash in libqxcb-glx-integration.so which is a system component, indicating issues with the opengl drivers on your system. Try updating mesa and/or you opengl dirvers.
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Old 07-18-2020, 09:36 PM   #5
rozen
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I discovered two things:
1) while the command "calibre" caused the segmentation error the command "calibre --detach" works fine.
2) I found that the ancient line "export XLIB_SKIP_ARGB_VISUALS=1" in my .bashrc file seemed to be causing the segmentation error.

I removed the line in 2) and now consider my problem solved.

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