Lyx. Единственное сообщение об ошибке, которое она дает мне:

lyx: symbol lookup error: lyx: undefined symbol: _ZN17QAbstractItemView11eventFilterEP7QObjectP6QEvent, version Qt_5

Lyx уже 2 дня принимает мою психику, и я вот-вот ее потеряю. Пожалуйста, помогите.

Я использую Ubuntu 20.04.1 LTS

Lyx версию: lyx/focal,теперь 2.3.5.2-1~focal~ppa1 amd64

• Qt пакеты установлены: apt list --installed | grep qt

libqt5core5a/focal,now 5.12.8+dfsg-0ubuntu1 amd64 [installed,automatic]
libqt5dbus5/focal,now 5.12.8+dfsg-0ubuntu1 amd64 [installed,automatic]
libqt5gui5/focal,now 5.12.8+dfsg-0ubuntu1 amd64 [installed,automatic]
libqt5network5/focal,now 5.12.8+dfsg-0ubuntu1 amd64 [installed,automatic]
libqt5svg5/focal,now 5.12.8-0ubuntu1 amd64 [installed,automatic]
libqt5widgets5/focal,now 5.12.8+dfsg-0ubuntu1 amd64 [installed,automatic]
qt5-gtk-platformtheme/focal,now 5.12.8+dfsg-0ubuntu1 amd64 [installed,automatic]
qttranslations5-l10n/focal,focal,now 5.12.8-0ubuntu1 all [installed,automatic]

Есть ли у кого-нибудь предположения, как это решить?

Правки

• Вывод apt-cache policy lyx

lyx:
  Installed: 2.3.4.2-2
  Candidate: 2.3.4.2-2
  Version table:
 *** 2.3.4.2-2 500
        500 http://br.archive.ubuntu.com/ubuntu focal/universe amd64 Packages
        100 /var/lib/dpkg/status

• Repositories: grep ^deb -r /etc/apt --include=*. list

/etc/apt/sources.list:deb http://br.archive.ubuntu.com/ubuntu/ focal main restricted
/etc/apt/sources.list:deb http://br.archive.ubuntu.com/ubuntu/ focal-updates main restricted
/etc/apt/sources.list:deb http://br.archive.ubuntu.com/ubuntu/ focal universe
/etc/apt/sources.list:deb http://br.archive.ubuntu.com/ubuntu/ focal-updates universe
/etc/apt/sources.list:deb http://br.archive.ubuntu.com/ubuntu/ focal multiverse
/etc/apt/sources.list:deb http://br.archive.ubuntu.com/ubuntu/ focal-updates multiverse
/etc/apt/sources.list:deb http://br.archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse
/etc/apt/sources.list:deb http://security.ubuntu.com/ubuntu focal-security main restricted
/etc/apt/sources.list:deb http://security.ubuntu.com/ubuntu focal-security universe
/etc/apt/sources.list:deb http://security.ubuntu.com/ubuntu focal-security multiverse
/etc/apt/sources.list.d/google-chrome.list:deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main
/etc/apt/sources.list.d/rock-core-ubuntu-qt4-focal.list:deb http://ppa.launchpad.net/rock-core/qt4/ubuntu focal main

• вывод для dpkg -l | grep ppa

ii  apparmor                 2.13.3-7ubuntu5.1      amd64   user-space parser utility for AppArmor
ii  libapparmor1:amd64       2.13.3-7ubuntu5.1      amd64   changehat AppArmor library
ii  ppa-purge                0.2.8+bzr63            all     disables a PPA and reverts to official packages
ii  printer-driver-pnm2ppa   1.13+nondbs-0ubuntu6   amd64   printer driver for HP-GDI printers

• вывод для dpkg -l | grep -i libQt5Widgets

ii  libqt5widgets5:amd64     5.12.8+dfsg-0ubuntu1   amd64   Qt 5 widgets module

• вывод для sudo find / -name libQt5Widgets* -type f

find: ‘/run/user/1000/doc’: Permission denied
find: ‘/run/user/1000/gvfs’: Permission denied
/usr/local/lib/libQt5Widgets.so.5
/usr/local/Wolfram/Mathematica/12.1/SystemFiles/Components/WSMCore/SystemModeler/SystemFiles/Libraries/Linux-x86-64/libQt5Widgets.so.5
/usr/local/Wolfram/Mathematica/12.1/SystemFiles/Libraries/Linux-x86-64/Qt/lib/libQt5Widgets.so.5
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5.12.8
/home/lima/.local/share/Trash/info/libQt5Widgets.so.5.10.1.trashinfo
/home/lima/.local/share/Trash/info/libQt5Widgets.so.5.trashinfo
/home/lima/.local/share/Trash/info/libQt5Widgets.so.5.10.trashinfo
/home/lima/.local/share/Trash/info/libQt5Widgets.so.trashinfo
/home/lima/.local/share/Trash/files/libQt5Widgets.so.5
/home/lima/.local/share/Trash/files/l_mkl_2020.3.279/pset/32e/qt/libQt5Widgets.so.5.12.8

• -put для которые lyx :

/usr/bin/lyx

• -выход для lyx --версия

lyx: symbol lookup error: lyx: undefined symbol: _ZN17QAbstractItemView11eventFilterEP7QObjectP6QEvent, version Qt_5

• -выход для ldd $(какой lyx)

linux-vdso.so.1 (0x00007ffd600a8000)
    libmythes-1.2.so.0 => /lib/x86_64-linux-gnu/libmythes-1.2.so.0 (0x00007ff29c583000)
    libenchant-2.so.2 => /lib/x86_64-linux-gnu/libenchant-2.so.2 (0x00007ff29c575000)
    libmagic.so.1 => /lib/x86_64-linux-gnu/libmagic.so.1 (0x00007ff29c54d000)
    libz.so.1 => /usr/local/lib/libz.so.1 (0x00007ff29c331000)
    libQt5Svg.so.5 => /usr/local/lib/libQt5Svg.so.5 (0x00007ff29c2d9000)
    libQt5Widgets.so.5 => /usr/local/lib/libQt5Widgets.so.5 (0x00007ff29bc93000)
    libQt5Gui.so.5 => /usr/local/lib/libQt5Gui.so.5 (0x00007ff29b6d1000)
    libQt5Core.so.5 => /lib/x86_64-linux-gnu/libQt5Core.so.5 (0x00007ff29b188000)
    libstdc++.so.6 => /lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007ff29afa7000)
    libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007ff29ae58000)
    libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007ff29ae3d000)
    libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007ff29ac4b000)
    /lib64/ld-linux-x86-64.so.2 (0x00007ff29d54d000)
    libgmodule-2.0.so.0 => /lib/x86_64-linux-gnu/libgmodule-2.0.so.0 (0x00007ff29ac43000)
    libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007ff29ab1a000)
    liblzma.so.5 => /lib/x86_64-linux-gnu/liblzma.so.5 (0x00007ff29aaf1000)
    libbz2.so.1.0 => /usr/local/lib/libbz2.so.1.0 (0x00007ff29a8dd000)
    libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007ff29a8ba000)
    libGL.so.1 => /lib/x86_64-linux-gnu/libGL.so.1 (0x00007ff29a832000)
    libpng16.so.16 => /usr/local/lib/libpng16.so.16 (0x00007ff29a5ef000)
    libicui18n.so.66 => /lib/x86_64-linux-gnu/libicui18n.so.66 (0x00007ff29a2f0000)
    libicuuc.so.66 => /lib/x86_64-linux-gnu/libicuuc.so.66 (0x00007ff29a10a000)
    libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007ff29a104000)
    libpcre2-16.so.0 => /lib/x86_64-linux-gnu/libpcre2-16.so.0 (0x00007ff29a081000)
    libdouble-conversion.so.3 => /lib/x86_64-linux-gnu/libdouble-conversion.so.3 (0x00007ff29a069000)
    libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007ff299ff6000)
    libGLdispatch.so.0 => /lib/x86_64-linux-gnu/libGLdispatch.so.0 (0x00007ff299f3e000)
    libGLX.so.0 => /lib/x86_64-linux-gnu/libGLX.so.0 (0x00007ff299f0a000)
    libicudata.so.66 => /lib/x86_64-linux-gnu/libicudata.so.66 (0x00007ff298449000)
    libX11.so.6 => /lib/x86_64-linux-gnu/libX11.so.6 (0x00007ff29830a000)
    libxcb.so.1 => /lib/x86_64-linux-gnu/libxcb.so.1 (0x00007ff2982e0000)
    libXau.so.6 => /lib/x86_64-linux-gnu/libXau.so.6 (0x00007ff2982da000)
    libXdmcp.so.6 => /lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007ff2982d2000)
    libbsd.so.0 => /lib/x86_64-linux-gnu/libbsd.so.0 (0x00007ff2982b8000)