Hi again David and all! I want to ask for the help again. We determined that the reason for users getting libqt5gui5-gles installed is the qt5-default package. We removed it in October 2020 because it is no longer needed. But the latest version of that package that ever existed had this dependency: Depends: qtbase5-dev (= 5.14.2+dfsg-5) | qtbase5-gles-dev (>= 5.14.2+dfsg) The latest available version of qtbase5-dev cannot satisfy that dependency, but the latest version of qtbase5-gles-dev can! So for people who had qt5-default installed, apt tries to replace the normal Qt stack with -gles one to keep that dependency satisfied. It does so even if it's going to remove qt5-default anyway! As an attempt to solve this problem, I added "Breaks: qt5-default" to both qtbase5-gles-dev and libqt5gui5-gles packages yesterday [2]. I thought this would convince apt to not consider these packages as a way to satisfy qt5-default dependency. But that did not work :( I am attaching a log which was obtained as follows: - Use sid snapshot from 2020-10-28 (a day before qt5-default was removed). - Install qt5-default package. - Change sources.list to use current sid. - Upgrade apt to the latest version (just in case). - Run "apt -o Debug::pkgProblemResolver=yes full-upgrade". As can be seen in that log, apt still tries to remove libqt5gui5 and install libqt5gui5-gles. If it did not do that, it would have to remove only one package (qt5-default) and not three. Can you please give me any advice on how to prevent apt from doing that? [1]: https://tracker.debian.org/news/1187732/accepted-qtbase-opensource-src-5151dfsg-2-source-into-unstable/ [2]: https://tracker.debian.org/news/1241122/accepted-qtbase-opensource-src-gles-5152dfsg-4-source-into-unstable/ P.S. The suggestion from your last mail (see my quote below) did not work too. On Sat, Jan 30, 2021 at 08:51:09PM +0300, Dmitry Shachnev wrote: > Thanks for the suggestion! Having the reverse doesn’t hurt of course, so > I have just added it in [1] and will include in the next upload. Let’s see > if it makes things any better. > > [1]: https://salsa.debian.org/qt-kde-team/qt/qtbase/-/commit/4064bf01d808094d -- Dmitry Shachnev
root@mitya57:/# apt -o Debug::pkgProblemResolver=yes full-upgrade Reading package lists... Done Building dependency tree... Done Reading state information... Done Starting pkgProblemResolver with broken count: 1 Starting 2 pkgProblemResolver with broken count: 1 Investigating (0) qt5-default:amd64 < 5.14.2+dfsg-6 @ii mK Ib > Broken qt5-default:amd64 Depends on qtbase5-dev:amd64 < 5.14.2+dfsg-6 -> 5.15.2+dfsg-5 @ii umU > (= 5.14.2+dfsg-6) Considering qtbase5-dev:amd64 0 as a solution to qt5-default:amd64 -2 Broken qt5-default:amd64 Depends on qtbase5-gles-dev:amd64 < none | 5.15.2+dfsg-4 @un uH > (>= 5.14.2+dfsg) Considering qtbase5-gles-dev:amd64 -1 as a solution to qt5-default:amd64 -2 Try Installing qtbase5-gles-dev:amd64 < none | 5.15.2+dfsg-4 @un uH > before changing qt5-default:amd64 Or group remove for qt5-default:amd64 Done Calculating upgrade... Done The following packages were automatically installed and are no longer required: fontconfig fontconfig-config fonts-dejavu-core libavahi-client3 libavahi-common-data libavahi-common3 libboost-iostreams1.67.0 libboost-iostreams1.71.0 libboost-system1.67.0 libbrotli1 libbsd0 libcups2 libcwidget3v5 libdbus-1-3 libdouble-conversion3 libdrm-amdgpu1 libdrm-common libdrm-intel1 libdrm-nouveau2 libdrm-radeon1 libdrm2 libedit2 libegl-dev libegl-mesa0 libegl1 libelf1 libevdev2 libexpat1 libfontconfig1 libfreetype6 libgbm1 libgl-dev libgl1 libgl1-mesa-dri libglapi-mesa libgles2 libglib2.0-0 libglu1-mesa libglu1-mesa-dev libglvnd0 libglx-dev libglx-mesa0 libglx0 libgraphite2-3 libgudev-1.0-0 libharfbuzz0b libice6 libicu67 libinput-bin libinput10 libjpeg62-turbo libllvm11 libmd0 libmd4c0 libmtdev1 libnss-nis libnss-nisplus libpciaccess0 libpcre2-16-0 libperl5.30 libpng16-16 libpthread-stubs0-dev libqt5concurrent5 libqt5core5a libqt5dbus5 libqt5gui5-gles libqt5network5 libqt5printsupport5 libqt5sql5 libqt5test5 libqt5widgets5 libqt5xml5 libsensors-config libsensors5 libsm6 libvulkan-dev libvulkan1 libwacom-common libwacom2 libwayland-client0 libwayland-server0 libx11-6 libx11-data libx11-dev libx11-xcb1 libxau-dev libxau6 libxcb-dri2-0 libxcb-dri3-0 libxcb-glx0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-present0 libxcb-randr0 libxcb-render-util0 libxcb-render0 libxcb-shape0 libxcb-shm0 libxcb-sync1 libxcb-util0 libxcb-util1 libxcb-xfixes0 libxcb-xinerama0 libxcb-xinput0 libxcb-xkb1 libxcb1 libxcb1-dev libxdamage1 libxdmcp-dev libxdmcp6 libxext-dev libxext6 libxfixes3 libxkbcommon-x11-0 libxkbcommon0 libxml2 libxrender1 libxshmfence1 libxxf86vm1 libz3-4 perl-modules-5.30 qt5-qmake qt5-qmake-bin qtbase5-dev-tools qtchooser shared-mime-info ucf x11-common x11proto-core-dev x11proto-dev x11proto-xext-dev xkb-data xorg-sgml-doctools xtrans-dev Use 'sudo apt autoremove' to remove them. The following packages will be REMOVED: libqt5gui5 qt5-default qtbase5-dev The following NEW packages will be installed: libboost-iostreams1.74.0 libgles2 libisl23 libmd0 libperl5.32 libqt5gui5-gles libxcb-util1 libxrender1 perl-modules-5.32 The following packages will be upgraded: apt-transport-https aptitude aptitude-common base-files base-passwd bash binutils binutils-common binutils-x86-64-linux-gnu bsdutils build-essential ca-certificates cpp cpp-10 dash debconf debian-archive-keyring diffutils dpkg dpkg-dev e2fsprogs fdisk findutils g++ g++-10 gcc gcc-10 gcc-10-base gcc-9-base gpgv grep gzip init-system-helpers libacl1 libasan5 libasan6 libatomic1 libattr1 libaudit-common libaudit1 libavahi-client3 libavahi-common-data libavahi-common3 libbinutils libblkid1 libboost-iostreams1.71.0 libbrotli1 libbsd0 libc-bin libc-dev-bin libc6 libc6-dev libcap-ng0 libcc1-0 libcom-err2 libcrypt-dev libcrypt1 libctf-nobfd0 libctf0 libcups2 libdb5.3 libdbus-1-3 libdebconfclient0 libdouble-conversion3 libdpkg-perl libdrm-amdgpu1 libdrm-common libdrm-intel1 libdrm-nouveau2 libdrm-radeon1 libdrm2 libedit2 libegl-mesa0 libelf1 libevdev2 libexpat1 libext2fs2 libfdisk1 libffi7 libfreetype6 libgbm1 libgcc-10-dev libgcc-s1 libgcrypt20 libgdbm-compat4 libgdbm6 libgl1-mesa-dri libglapi-mesa libglib2.0-0 libglx-mesa0 libgmp10 libgomp1 libgssapi-krb5-2 libharfbuzz0b libhogweed6 libicu67 libidn2-0 libinput-bin libinput10 libitm1 libjpeg62-turbo libk5crypto3 libkrb5-3 libkrb5support0 libllvm11 liblsan0 liblz4-1 liblzma5 libmd4c0 libmount1 libncursesw6 libp11-kit0 libpam-modules libpam-modules-bin libpam-runtime libpam0g libpcre2-16-0 libpcre2-8-0 libqt5concurrent5 libqt5core5a libqt5dbus5 libqt5network5 libqt5printsupport5 libqt5sql5 libqt5test5 libqt5widgets5 libqt5xml5 libquadmath0 libseccomp2 libselinux1 libsemanage1 libsensors-config libsensors5 libsmartcols1 libsqlite3-0 libss2 libssl1.1 libstdc++-10-dev libstdc++6 libsystemd0 libtinfo6 libtirpc-common libtirpc-dev libtirpc3 libtsan0 libubsan1 libudev1 libuuid1 libvulkan-dev libvulkan1 libwacom-common libwacom2 libwayland-client0 libwayland-server0 libx11-6 libx11-data libx11-dev libx11-xcb1 libxapian30 libxau-dev libxau6 libxcb-dri2-0 libxcb-dri3-0 libxcb-glx0 libxcb-image0 libxcb-present0 libxcb-randr0 libxcb-render0 libxcb-shape0 libxcb-shm0 libxcb-sync1 libxcb-xfixes0 libxcb-xinerama0 libxcb-xinput0 libxcb-xkb1 libxcb1 libxcb1-dev libxext-dev libxext6 libxkbcommon-x11-0 libxkbcommon0 libxml2 libz3-4 libzstd1 linux-libc-dev logsave make mount nano ncurses-base ncurses-bin openssl patch perl perl-base qt5-qmake qt5-qmake-bin qtbase5-dev-tools sensible-utils sysvinit-utils tar tzdata util-linux x11-common xorg-sgml-doctools xz-utils 206 upgraded, 9 newly installed, 3 to remove and 0 not upgraded. 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