Control: tags -1 + moreinfo On Sun, 04 Aug 2019 at 12:28:40 +0200, Stéphane Glondu wrote: > Since recently, gnome-shell on wayland crashes when I switch the input > of my monitor. This is a regression. And I don't observe the bug on > X11.
Please try upgrading libmutter-3-0 and gir1.2-mutter-3 to 3.30.2-8 from unstable, then reboot (or at least log out from GNOME and back in) to make sure that GNOME Shell is using the upgraded libraries. This sounds like #932428, #932767 and #932781, which are believed to be multiple reports of a mutter bug that was only a theoretical problem in buster, but became a practical problem as a result of upgrading from mesa 18.3.x to 19.1.x after buster was released: mesa 19.1.x is more multi-threaded, which means mutter has to be more careful about shutting things down in the right order to avoid a use-after-free on monitor configuration changes or suspend. If the problem persists even after you have upgraded, please install systemd-coredump (or some other way to get core dumps, if you have a favourite), along with GLib and libmutter debug symbols, and send a backtrace from the crash to this bug report. I personally recommend systemd-coredump, which collects core dumps system-wide, records information about them in the systemd journal, and keeps the actual core dump for a while (with automatic rotation/expiry) so that you can load it into gdb and get a more complete backtrace. More information: https://wiki.debian.org/HowToGetABacktrace#Core_dump Because this is an intermittent problem (it doesn't *always* crash) I'm waiting for more feedback before I close the bugs. > I have no idea how to debug this. Is it possible to get gnome-shell > stdout and stderr, or to run it from a ssh session (from another > computer)? On a system booted with systemd, gnome-shell's stdout and stderr should end up in the systemd journal. I don't know of a way to run gnome-shell in Wayland mode other than by launching it from gdm. smcv
