You have been subscribed to a public bug: After the upgrade from 18.04 to 18.10, SDDM fails to start. This happens with kernel 4.18.0-10 and 4.15.0-36 (it was the chance to discover grub-reboot) See SDDM crash file attached.
The machine is a virtual machine, and PCI devices use virtio-pci driver for example. I looked into /var/log/Xorg.0.log and found many error messages, the first one being : (EE) open /dev/dri/card0: No such file or directory See Xorg log file and crash file attached. Then I looked at the output of 'lspci -vvnn' and it seems that no kernel driver manages the VGA Controller. See output of 'lspci -vvnn' attached According to the following message, the missing kernel driver may be : bochs-drm or virtio-vga https://www.redhat.com/archives/libvir-list/2015-August/msg00220.html # lsb_release -rd Description: Ubuntu 18.10 Release: 18.10 ** Affects: xorg-server (Ubuntu) Importance: Undecided Status: New ** Tags: bot-comment -- X.org crashes after upgrade to 18.10 https://bugs.launchpad.net/bugs/1802950 You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
