The gnome-shell crash is bug 1964458 so I'll remove references to that here.
Your log shows Xorg is failing to start on QXL with: avril 05 16:15:58 ubuntu /usr/libexec/gdm-x-session[4265]: (EE) Screen(s) found, but none have a usable configuration. avril 05 16:15:58 ubuntu /usr/libexec/gdm-x-session[4265]: (EE) avril 05 16:15:58 ubuntu /usr/libexec/gdm-x-session[4265]: Fatal server error: avril 05 16:15:58 ubuntu /usr/libexec/gdm-x-session[4265]: (EE) no screens found(EE) avril 05 16:15:58 ubuntu /usr/libexec/gdm-x-session[4265]: (EE) Although see also bug 1967719 and bug 1953035. ** Description changed: Ubuntu Desktop Jammy 20220405 It fails to boot to the live session in virt-manager and gnome-boxes. - ubiquity-dm starts fine but the live session does. The graphical session keeps dying. There are crashes of gnome-shell and xorg in /var/crash. - - From the journal - avril 05 16:15:55 ubuntu kernel: gnome-shell[1383]: segfault at 3f1d5d200000 ip 00007fa1ca256f44 sp 00007fff16f7c2a0 error 4 in libmozjs-91.so.91.7.0[7fa1ca1d7000+8e6000] - avril 05 16:15:55 ubuntu kernel: Code: 00 00 00 0f 85 73 05 00 00 48 83 c4 38 5b 5d 41 5c 41 5d 41 5e 41 5f c3 66 0f 1f 44 00 00 48 85 f6 74 d2 48 81 e6 00 00 f0 ff <48> 8b 06 48 85 c0 74 c3 80 b8 61 01 00 00 00 74 ba 48 3b 98 d0 00 - avril 05 16:15:55 ubuntu systemd[1]: Started crash report submission - + ubiquity-dm starts fine but the live session does. The graphical session keeps dying. If I switch from QXL to Virtio then it works. ** Package changed: ubiquity (Ubuntu) => xserver-xorg-video-qxl (Ubuntu) ** Also affects: xorg-server (Ubuntu) Importance: Undecided Status: New ** Tags added: qxl -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1967901 Title: Jammy fails to boot to live session in virt-manager with QXL To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1967901/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs