We need the robots to retrace that properly, but what I can figure so far is:
#0 __pthread_kill_implementation (no_tid=0, signo=11, threadid=139744913655232) at ./nptl/pthread_kill.c:44 44 ./nptl/pthread_kill.c: No such file or directory. [Current thread is 1 (Thread 0x7f18e5f005c0 (LWP 7141))] (gdb) bt #0 __pthread_kill_implementation (no_tid=0, signo=11, threadid=139744913655232) at ./nptl/pthread_kill.c:44 #1 __pthread_kill_internal (signo=11, threadid=139744913655232) at ./nptl/pthread_kill.c:78 #2 __GI___pthread_kill (threadid=139744913655232, signo=signo@entry=11) at ./nptl/pthread_kill.c:89 #3 0x00007f18eb1c9476 in __GI_raise (sig=11) at ../sysdeps/posix/raise.c:26 #4 0x0000561d62d507aa in ?? () #5 <signal handler called> #6 __strlen_avx2_rtm () at ../sysdeps/x86_64/multiarch/strlen-avx2.S:74 #7 0x00007f18d5f2192a in ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so #8 0x00007f18d5f21567 in ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so #9 0x00007f18d62afed0 in ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so #10 0x00007f18d62ab825 in ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so #11 0x00007f18d62ad4c7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so #12 0x00007f18d61940da in ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so #13 0x00007f18d617523f in ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so #14 0x00007f18eae25cf2 in ?? () from /usr/lib/x86_64-linux-gnu/mutter-10/libmutter-cogl-10.so.0 #15 0x00007f18eae22b3c in ?? () from /usr/lib/x86_64-linux-gnu/mutter-10/libmutter-cogl-10.so.0 #16 0x00007f18eae22fee in ?? () from /usr/lib/x86_64-linux-gnu/mutter-10/libmutter-cogl-10.so.0 #17 0x00007f18eae33c71 in ?? () from /usr/lib/x86_64-linux-gnu/mutter-10/libmutter-cogl-10.so.0 #18 0x00007f18eae1bc76 in ?? () from /usr/lib/x86_64-linux-gnu/mutter-10/libmutter-cogl-10.so.0 #19 0x00007f18eae4aeb2 in ?? () from /usr/lib/x86_64-linux-gnu/mutter-10/libmutter-cogl-10.so.0 #20 0x00007f18eae4b233 in ?? () from /usr/lib/x86_64-linux-gnu/mutter-10/libmutter-cogl-10.so.0 #21 0x00007f18eae4b4c6 in ?? () from /usr/lib/x86_64-linux-gnu/mutter-10/libmutter-cogl-10.so.0 #22 0x00007f18eae4bf4f in ?? () from /usr/lib/x86_64-linux-gnu/mutter-10/libmutter-cogl-10.so.0 #23 0x00007f18eae53343 in ?? () from /usr/lib/x86_64-linux-gnu/mutter-10/libmutter-cogl-10.so.0 #24 0x00007f18ec109f80 in g_list_foreach () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #25 0x00007f18eae52e7b in ?? () from /usr/lib/x86_64-linux-gnu/mutter-10/libmutter-cogl-10.so.0 #26 0x00007f18eae55e30 in cogl_blit_framebuffer () from /usr/lib/x86_64-linux-gnu/mutter-10/libmutter-cogl-10.so.0 #27 0x00007f18eb695b4d in clutter_stage_view_before_swap_buffer () from /usr/lib/x86_64-linux-gnu/mutter-10/libmutter-clutter-10.so.0 #28 0x00007f18eb434803 in ?? () from /lib/x86_64-linux-gnu/libmutter-10.so.0 #29 0x00007f18eb438f71 in ?? () from /lib/x86_64-linux-gnu/libmutter-10.so.0 #30 0x00007f18eb52482b in ?? () from /lib/x86_64-linux-gnu/libmutter-10.so.0 #31 0x00007f18eb696258 in ?? () from /usr/lib/x86_64-linux-gnu/mutter-10/libmutter-clutter-10.so.0 --Type <RET> for more, q to quit, c to continue without paging-- #32 0x00007f18eb65eda9 in ?? () from /usr/lib/x86_64-linux-gnu/mutter-10/libmutter-clutter-10.so.0 #33 0x00007f18ec10fd3b in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #34 0x00007f18ec1646c8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #35 0x00007f18ec10f2b3 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #36 0x00007f18eb47f909 in meta_context_run_main_loop () from /lib/x86_64-linux-gnu/libmutter-10.so.0 #37 0x0000561d62d4ff12 in ?? () #38 0x00007f18eb1b0d90 in __libc_start_call_main ( main=main@entry=0x561d62d4fa70, argc=argc@entry=1, argv=argv@entry=0x7ffc73a73a48) at ../sysdeps/nptl/libc_start_call_main.h:58 -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/2015386 Title: gnome-shell crashes after "switching to" a new user from an existing login To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/2015386/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs