Public bug reported: After installing the latest Lubuntu 20.04.2 LTS on my laptop, i wasnt able to log on into that system anymore. The system runs into a mouse cursor only visible black screen with no greeter to log in. Switching to console and login into terminal is just fine and all works as expected on terminal level. Restarting the sddm (service sddm restart) didnt work. Reinstalling/reconfiguring (purging orphaned conf file before) sddm and lubuntu-desktop didnt help. After some investigation on the log files, i found out that the sddm-greeter process crashes for reasons unknown with a bad instruction pointer value. More info below.
dmesg: [71.601020] sddm-greeter[1084]: segfault at 0 ip 0000000000000000 sp 00007ffe946a7ed8 error 14 in sddm-greeter[55bc43ab0000+17000] [71.601030] Code: Bad RIP value. System Arch: amd64 lsb_release -a: Distributor ID: Ubuntu Description: Ubuntu 20.04.2 LTS Release: 20.04 Codename: focal uname -r: 5.4.0-66-generic apt-cache show sddm: Package: sddm Architecture: amd64 Version: 0.18.1-1ubuntu2 Priority: optional Section: universe/kde Origin: Ubuntu Maintainer: Ubuntu Developers <ubuntu-devel-disc...@lists.ubuntu.com> Original-Maintainer: Debian/Kubuntu Qt/KDE Maintainers <debian-qt-...@lists.debian.org> Bugs: https://bugs.launchpad.net/ubuntu/+filebug Installed-Size: 1916 Provides: x-display-manager Depends: adduser, qml-module-qtquick2, xauth, x11-common, xserver-xorg | xserver, debconf (>= 0.5) | debconf-2.0, libc6 (>= 2.14), libgcc-s1 (>= 3.0), libpam0g (>= 0.99.7.1), libqt5core5a (>= 5.12.2), libqt5dbus5 (>= 5.6.0~), libqt5gui5 (>= 5.6.0~beta) | libqt5gui5-gles (>= 5.6.0~beta), libqt5network5 (>= 5.6.0~), libqt5qml5 (>= 5.0.2), libqt5quick5 (>= 5.0.2) | libqt5quick5-gles (>= 5.0.2), libstdc++6 (>= 5.2), libsystemd0, libxcb-xkb1, libxcb1 Recommends: haveged, libpam-systemd, sddm-theme-debian-maui | sddm-theme Suggests: libpam-kwallet5, qtvirtualkeyboard-plugin Filename: pool/universe/s/sddm/sddm_0.18.1-1ubuntu2_amd64.deb Size: 631728 MD5sum: 7926cf1daefe2f0d730dd592342d15c1 SHA1: 4d37b7b88160a7fd2235c7fd296cdbeb1d042a91 SHA256: e894e61102080f66e397eb462d418a7c490ac91e0499d3becbf0a8011bd0a429 Homepage: https://github.com/sddm/sddm Description-en: modern display manager for X11 SDDM is a modern display manager for X11 aiming to be fast, simple and beautiful. It uses modern technologies like QtQuick to create smooth, animated user interfaces. Description-md5: 60d2ea934d7c99b8460547a3b6ef2196 Task: kubuntu-desktop, kubuntu-full, lubuntu-desktop ** Affects: sddm (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1916670 Title: sddm-greeter crashes with segfault (Bad RIP value) before login shows up on Lubuntu 20.04.2 LTS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sddm/+bug/1916670/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
