Thank you for reporting this bug to Ubuntu. Ubuntu 21.04 (hirsute) reached end-of-life on January 20, 2022.
See this document for currently supported Ubuntu releases: https://wiki.ubuntu.com/Releases We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. If you then find the bug is still present in the newer Ubuntu version, please add a comment here telling us which new version it is in. ** Changed in: gnome-shell (Ubuntu) Status: New => Won't Fix -- 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/1937958 Title: gnome-shell gdb instructions cause immediate "Oh no" crash Status in GNOME Shell: Unknown Status in gnome-shell package in Ubuntu: Won't Fix Bug description: I wanted to report a gnome-shell bug with a backtrace, so tried to use the instructions in https://wiki.gnome.org/Projects/GnomeShell/Debugging which say to do the following in an ssh login or separate VT: gnome_session=$(pgrep -u $USER gnome-session) eval export $(sed 's/\o000/\n/g;' < /proc/$gnome_session/environ | grep DISPLAY) eval export $(sed 's/\o000/\n/g;' < /proc/$gnome_session/environ | grep XAUTHORITY) eval export $(sed 's/\o000/\n/g;' < /proc/$gnome_session/environ | grep DBUS_SESSION_BUS_ADDRESS) gdb ...etc... However three problems came up, two minor (wrong instructions), the other major: (1) There is more than one gnome-session process, and so the shell variable $gnome_session gets set to a list of several PIDs, which in turn causes syntax errors when using the expression "/proc/$gnome_session/environ". In Ubuntu 21.04 I have three gnome-session processes immediately after rebooting and logging in (I have auto-login enabled, so the login happens by itself, in case that matters): $ ps -F $(pgrep -u $USER gnome-session|perl -p -e 's/(\d+)/-p $1/') UID PID PPID C SZ RSS PSR STIME TTY TIME CMD jima 9743 9725 0 55216 16084 2 13:41 tty3 00:00:00 /usr/libexec/gnome-session-binary --systemd --session=ubuntu jima 9828 8066 0 24031 6148 8 13:41 ? 00:00:00 /usr/libexec/gnome-session-ctl --monitor jima 9838 8066 0 129272 18176 7 13:41 ? 00:00:00 /usr/libexec/gnome-session-binary --systemd-service --session=ubuntu (2) The instructions specify this gdb command: call gjs_dumpstack () However that results in an error and the call is not made: 'gjs_dumpstack' has unknown return type; cast the call to its declared return type (3) Most importantly, a crash: Immediately upon starting the new gnome-shell process (with option --replace) a white screen appears with "Oh No... something went wrong..." forcing me log out. The crash happens whether using an independent VT or an ssh login. Afterwards I typed Control-C to get control in gdb, and produced the attached backtraces but they don't seem useful (see attached typescript file). /var/syslog might be useful. I will attach the portion beginning just before starting the new gnome-shell The attached typescript file shows what I did to circumvent the buggy instructions at https://wiki.gnome.org/Projects/GnomeShell/Debugging P.S. The original crash I wanted to report was that opening any .jpg in gimp and selecting part of the image and then doing Select->Invert instantly freezes the system. The only recovery is to use a separate VT to kill the gimp process, after which gnome-shell restarts. A system error dialog appears saying gnome-session [correction: gnome- shell] got a segfault somewhere; thus the desire to get a backtrace. But this bug report is _not_ about that bug, but is about how using the debug instructions in the wiki are incorrect and when fixed seem to cause a crash on their own. ProblemType: Bug DistroRelease: Ubuntu 21.04 Package: gnome-shell 3.38.4-1ubuntu3~21.04.1 ProcVersionSignature: Ubuntu 5.11.0-25.27-generic 5.11.22 Uname: Linux 5.11.0-25-generic x86_64 ApportVersion: 2.20.11-0ubuntu65.1 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: GNOME Date: Sun Jul 25 13:41:54 2021 DisplayManager: gdm3 InstallationDate: Installed on 2021-07-20 (5 days ago) InstallationMedia: Ubuntu-Server 21.04 "Hirsute Hippo" - Release amd64 (20210421) RelatedPackageVersions: mutter-common 3.38.4-1ubuntu2 SourcePackage: gnome-shell UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-shell/+bug/1937958/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
