Paul, you need to do that from another system via SSH or from tty3 (or any free one), although you still might not be able to go back to the tty when frozen... So having another system around (using byobu too) would help.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1714989 Title: gnome-shell crashed with SIGSEGV in g_type_check_instance_cast() from st_label_set_text() (dash-to-panel specific?) Status in GNOME Shell: Confirmed Status in gnome-shell package in Ubuntu: Incomplete Bug description: Saw some reports with the same title but they're all for previous versions. error report: https://errors.ubuntu.com/problem/1c95cc2653ab00054b5d1764e41d974328a5f49d ProblemType: Crash DistroRelease: Ubuntu 17.10 Package: gnome-shell 3.25.91-0ubuntu2 ProcVersionSignature: Ubuntu 4.12.0-12.13-generic 4.12.8 Uname: Linux 4.12.0-12-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia ApportVersion: 2.20.7-0ubuntu1 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Mon Sep 4 16:52:13 2017 DisplayManager: gdm3 EcryptfsInUse: Yes ExecutablePath: /usr/bin/gnome-shell InstallationDate: Installed on 2017-04-21 (135 days ago) InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412) ProcCmdline: /usr/bin/gnome-shell ProcEnviron: LANGUAGE=en_GB:en PATH=(custom, user) XDG_RUNTIME_DIR=<set> LANG=en_GB.UTF-8 SHELL=/bin/bash SegvAnalysis: Segfault happened at: 0x7fd97c8e7e5d <g_type_check_instance_cast+77>: movzbl 0x16(%rax),%edx PC (0x7fd97c8e7e5d) ok source "0x16(%rax)" (0x0000eb1e) not located in a known VMA region (needed readable region)! destination "%edx" ok SegvReason: reading NULL VMA Signal: 11 SourcePackage: gnome-shell StacktraceTop: g_type_check_instance_cast () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 st_label_set_text () from /usr/lib/gnome-shell/libst-1.0.so ffi_call_unix64 () from /usr/lib/x86_64-linux-gnu/libffi.so.6 ffi_call () from /usr/lib/x86_64-linux-gnu/libffi.so.6 ?? () from /usr/lib/libgjs.so.0 Title: gnome-shell crashed with SIGSEGV in g_type_check_instance_cast() UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-shell/+bug/1714989/+subscriptions -- 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
