gdb$ bt
#0  0x00007f954fb337a0 in meta_logical_monitor_get_scale () at /usr/lib/libmutter-1.so.0
#1  0x00007f954fbc1ecd in meta_window_wayland_get_geometry_scale () at /usr/lib/libmutter-1.so.0
#2  0x00007f954fbc235a in  () at /usr/lib/libmutter-1.so.0
#3  0x00007f954fb861a5 in meta_window_move_resize_internal () at /usr/lib/libmutter-1.so.0
#4  0x00007f954fb86d8d in  () at /usr/lib/libmutter-1.so.0
#5  0x00007f954fb7fecf in  () at /usr/lib/libmutter-1.so.0
#6  0x00007f95516850be in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#7  0x00007f9551686f69 in  () at /usr/lib/libglib-2.0.so.0
#8  0x00007f9551687f42 in g_main_loop_run () at /usr/lib/libglib-2.0.so.0
#9  0x00007f954fb72b00 in meta_run () at /usr/lib/libmutter-1.so.0
#10 0x000055f2f4100e8c in  ()
#11 0x00007f95523a4f6a in __libc_start_main () at /usr/lib/libc.so.6
#12 0x000055f2f4100fba in  ()
gdb$ i r
rax            0x0	0x0
rbx            0x0	0x0
rcx            0x2	0x2
rdx            0x1	0x1
rsi            0x55f2f6126c90	0x55f2f6126c90
rdi            0x0	0x0
rbp            0x585	0x585
rsp            0x7ffd48047e38	0x7ffd48047e38
r8             0x55f2f6126c90	0x55f2f6126c90
r9             0x58500000a00	0x58500000a00
r10            0x55f2f4b9bda0	0x55f2f4b9bda0
r11            0x55f2f6126c90	0x55f2f6126c90
r12            0xa00	0xa00
r13            0x1b	0x1b
r14            0x58500000a00	0x58500000a00
r15            0x55f2f4ce8030	0x55f2f4ce8030
rip            0x7f954fb337a0	0x7f954fb337a0 <meta_logical_monitor_get_scale>
eflags         0x10246	[ PF ZF IF RF ]
cs             0x33	0x33
ss             0x2b	0x2b
ds             0x0	0x0
es             0x0	0x0
fs             0x0	0x0
gs             0x0	0x0
gdb$ disas
Dump of assembler code for function meta_logical_monitor_get_scale:
=> 0x00007f954fb337a0 <+0>:	movss  0x38(%rdi),%xmm0
   0x00007f954fb337a5 <+5>:	retq   
End of assembler dump.



Oct 12 22:48:30 hostname kernel: gnome-shell[916]: segfault at 38 ip 00007f954fb337a0 sp 00007ffd48047e38 error 4 in libmutter-1.so.0.0.0[7f954fad9000+163000]
Oct 12 22:48:30 hostname systemd[1]: File /usr/lib/systemd/system/systemd-coredump@.service:37 configures an IP firewall (IPAddressDeny=any), but the local system does not support BPF/cgroup based firewalling.
Oct 12 22:48:30 hostname systemd[1]: Proceeding WITHOUT firewalling in effect!
Oct 12 22:48:30 hostname systemd[1]: Started Process Core Dump (PID 1694/UID 0).
Oct 12 22:48:31 hostname gnome-terminal-[1218]: Error reading events from display: Connection reset by peer
Oct 12 22:48:31 hostname org.gnome.Shell.desktop[916]: (EE)
Oct 12 22:48:31 hostname org.gnome.Shell.desktop[916]: Fatal server error:
Oct 12 22:48:31 hostname org.gnome.Shell.desktop[916]: (EE) failed to read Wayland events: Broken pipe
Oct 12 22:48:31 hostname org.gnome.Shell.desktop[916]: (EE)
Oct 12 22:48:31 hostname gnome-session-binary[886]: WARNING: Application 'org.gnome.Shell.desktop' killed by signal 11
Oct 12 22:48:31 hostname gnome-session[886]: gnome-session-binary[886]: WARNING: Application 'org.gnome.Shell.desktop' killed by signal 11
Oct 12 22:48:31 hostname gnome-session-binary[886]: Unrecoverable failure in required component org.gnome.Shell.desktop
Oct 12 22:48:31 hostname polkitd[607]: Unregistered Authentication Agent for unix-session:c2 (system bus name :1.93, object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8) (disconnected from bus)
Oct 12 22:48:31 hostname systemd[869]: gnome-terminal-server.service: Main process exited, code=exited, status=1/FAILURE
Oct 12 22:48:31 hostname systemd[869]: gnome-terminal-server.service: Failed with result 'exit-code'.
Oct 12 22:48:31 hostname gsd-rfkill[1041]: g_object_notify: object class 'CcRfkillGlib' has no property named 'kernel-noinput'
Oct 12 22:48:31 hostname pulseaudio[961]: ICE default IO error handler doing an exit(), pid = 961, errno = 11
Oct 12 22:48:31 hostname bluetoothd[471]: Endpoint unregistered: sender=:1.95 path=/MediaEndpoint/A2DPSource
Oct 12 22:48:31 hostname bluetoothd[471]: Endpoint unregistered: sender=:1.95 path=/MediaEndpoint/A2DPSink
Oct 12 22:48:31 hostname gdm-password][864]: pam_unix(gdm-password:session): session closed for user oxff
Oct 12 22:48:31 hostname systemd[869]: pulseaudio.service: Main process exited, code=exited, status=1/FAILURE
Oct 12 22:48:31 hostname systemd[869]: pulseaudio.service: Failed with result 'exit-code'.
Oct 12 22:48:31 hostname gsd-color[774]: failed to connect to device: Failed to connect to missing device /org/freedesktop/ColorManager/devices/xrandr_Dell_Inc__DELL_U2515H_9X2VY5C423AL_oxff_1000
Oct 12 22:48:31 hostname systemd-coredump[1698]: Process 916 (gnome-shell) of user 1000 dumped core.
                                               
                                               Stack trace of thread 916:
                                               #0  0x00007f954fb337a0 meta_logical_monitor_get_scale (libmutter-1.so.0)
                                               #1  0x00007f954fbc1ecd meta_window_wayland_get_geometry_scale (libmutter-1.so.0)
                                               #2  0x00007f954fbc235a n/a (libmutter-1.so.0)
                                               #3  0x00007f954fb861a5 meta_window_move_resize_internal (libmutter-1.so.0)
                                               #4  0x00007f954fb86d8d n/a (libmutter-1.so.0)
                                               #5  0x00007f954fb7fecf n/a (libmutter-1.so.0)
                                               #6  0x00007f95516850be g_main_context_dispatch (libglib-2.0.so.0)
                                               #7  0x00007f9551686f69 n/a (libglib-2.0.so.0)
                                               #8  0x00007f9551687f42 g_main_loop_run (libglib-2.0.so.0)
                                               #9  0x00007f954fb72b00 meta_run (libmutter-1.so.0)
                                               #10 0x000055f2f4100e8c n/a (gnome-shell)
                                               #11 0x00007f95523a4f6a __libc_start_main (libc.so.6)
                                               #12 0x000055f2f4100fba n/a (gnome-shell)
                                               
                                               Stack trace of thread 965:
                                               #0  0x00007f955274838d pthread_cond_wait@@GLIBC_2.3.2 (libpthread.so.0)
                                               #1  0x00007f95498b4465 n/a (libmozjs-52.so.0)
                                               #2  0x00007f95498b46b5 n/a (libmozjs-52.so.0)
                                               #3  0x00007f9549cb22e5 n/a (libmozjs-52.so.0)
                                               #4  0x00007f9549cd2ca2 n/a (libmozjs-52.so.0)
                                               #5  0x00007f955274208a start_thread (libpthread.so.0)
                                               #6  0x00007f955247a24f __clone (libc.so.6)
                                               
                                               Stack trace of thread 966:
                                               #0  0x00007f955274838d pthread_cond_wait@@GLIBC_2.3.2 (libpthread.so.0)
                                               #1  0x00007f95498b4465 n/a (libmozjs-52.so.0)
                                               #2  0x00007f95498b46b5 n/a (libmozjs-52.so.0)
                                               #3  0x00007f9549cb22e5 n/a (libmozjs-52.so.0)
                                               #4  0x00007f9549cd2ca2 n/a (libmozjs-52.so.0)
                                               #5  0x00007f955274208a start_thread (libpthread.so.0)
                                               #6  0x00007f955247a24f __clone (libc.so.6)
                                               
                                               Stack trace of thread 918:
                                               #0  0x00007f955246fd4b __poll (libc.so.6)
                                               #1  0x00007f9551686ed3 n/a (libglib-2.0.so.0)
                                               #2  0x00007f9551686fae g_main_context_iteration (libglib-2.0.so.0)
                                               #3  0x00007f9551687002 n/a (libglib-2.0.so.0)
                                               #4  0x00007f955167b1eb n/a (libglib-2.0.so.0)
                                               #5  0x00007f955274208a start_thread (libpthread.so.0)
                                               #6  0x00007f955247a24f __clone (libc.so.6)
                                               
                                               Stack trace of thread 919:
                                               #0  0x00007f955246fd4b __poll (libc.so.6)
                                               #1  0x00007f9551686ed3 n/a (libglib-2.0.so.0)
                                               #2  0x00007f9551687f42 g_main_loop_run (libglib-2.0.so.0)
                                               #3  0x00007f9551bf1e28 n/a (libgio-2.0.so.0)
                                               #4  0x00007f955167b1eb n/a (libglib-2.0.so.0)
                                               #5  0x00007f955274208a start_thread (libpthread.so.0)
                                               #6  0x00007f955247a24f __clone (libc.so.6)
                                               
                                               Stack trace of thread 921:
                                               #0  0x00007f955246fd4b __poll (libc.so.6)
                                               #1  0x00007f9551686ed3 n/a (libglib-2.0.so.0)
                                               #2  0x00007f9551686fae g_main_context_iteration (libglib-2.0.so.0)
                                               #3  0x00007f953a8c2b0e n/a (libdconfsettings.so)
                                               #4  0x00007f955167b1eb n/a (libglib-2.0.so.0)
                                               #5  0x00007f955274208a start_thread (libpthread.so.0)
                                               #6  0x00007f955247a24f __clone (libc.so.6)
                                               
                                               Stack trace of thread 964:
                                               #0  0x00007f955274838d pthread_cond_wait@@GLIBC_2.3.2 (libpthread.so.0)
                                               #1  0x00007f95498b4465 n/a (libmozjs-52.so.0)
                                               #2  0x00007f95498b46b5 n/a (libmozjs-52.so.0)
                                               #3  0x00007f9549cb22e5 n/a (libmozjs-52.so.0)
                                               #4  0x00007f9549cd2ca2 n/a (libmozjs-52.so.0)
                                               #5  0x00007f955274208a start_thread (libpthread.so.0)
                                               #6  0x00007f955247a24f __clone (libc.so.6)
                                               
                                               Stack trace of thread 969:
                                               #0  0x00007f955274838d pthread_cond_wait@@GLIBC_2.3.2 (libpthread.so.0)
                                               #1  0x00007f95498b4465 n/a (libmozjs-52.so.0)
                                               #2  0x00007f95498b46b5 n/a (libmozjs-52.so.0)
                                               #3  0x00007f9549cb22e5 n/a (libmozjs-52.so.0)
                                               #4  0x00007f9549cd2ca2 n/a (libmozjs-52.so.0)
                                               #5  0x00007f955274208a start_thread (libpthread.so.0)
                                               #6  0x00007f955247a24f __clone (libc.so.6)
                                               
                                               Stack trace of thread 970:
                                               #0  0x00007f955274838d pthread_cond_wait@@GLIBC_2.3.2 (libpthread.so.0)
                                               #1  0x00007f95498b4465 n/a (libmozjs-52.so.0)
                                               #2  0x00007f95498b46b5 n/a (libmozjs-52.so.0)
                                               #3  0x00007f9549cb22e5 n/a (libmozjs-52.so.0)
                                               #4  0x00007f9549cd2ca2 n/a (libmozjs-52.so.0)
                                               #5  0x00007f955274208a start_thread (libpthread.so.0)
                                               #6  0x00007f955247a24f __clone (libc.so.6)
                                               
                                               Stack trace of thread 960:
                                               #0  0x00007f955246fd4b __poll (libc.so.6)
                                               #1  0x00007f952ac91773 n/a (libpulse.so.0)
                                               #2  0x00007f952ac82bd0 pa_mainloop_poll (libpulse.so.0)
                                               #3  0x00007f952ac83271 pa_mainloop_iterate (libpulse.so.0)
                                               #4  0x00007f952ac83301 pa_mainloop_run (libpulse.so.0)
                                               #5  0x00007f952ac916ae n/a (libpulse.so.0)
                                               #6  0x00007f952aa3081c n/a (libpulsecommon-11.1.so)
                                               #7  0x00007f955274208a start_thread (libpthread.so.0)
                                               #8  0x00007f955247a24f __clone (libc.so.6)
                                               
                                               Stack trace of thread 967:
                                               #0  0x00007f955274838d pthread_cond_wait@@GLIBC_2.3.2 (libpthread.so.0)
                                               #1  0x00007f95498b4465 n/a (libmozjs-52.so.0)
                                               #2  0x00007f95498b46b5 n/a (libmozjs-52.so.0)
                                               #3  0x00007f9549cb22e5 n/a (libmozjs-52.so.0)
                                               #4  0x00007f9549cd2ca2 n/a (libmozjs-52.so.0)
                                               #5  0x00007f955274208a start_thread (libpthread.so.0)
                                               #6  0x00007f955247a24f __clone (libc.so.6)
                                               
                                               Stack trace of thread 974:
                                               #0  0x00007f955274838d pthread_cond_wait@@GLIBC_2.3.2 (libpthread.so.0)
                                               #1  0x00007f95498b4465 n/a (libmozjs-52.so.0)
                                               #2  0x00007f95498b46b5 n/a (libmozjs-52.so.0)
                                               #3  0x00007f9549cb22e5 n/a (libmozjs-52.so.0)
                                               #4  0x00007f9549cd2ca2 n/a (libmozjs-52.so.0)
                                               #5  0x00007f955274208a start_thread (libpthread.so.0)
                                               #6  0x00007f955247a24f __clone (libc.so.6)
                                               
                                               Stack trace of thread 968:
                                               #0  0x00007f955274838d pthread_cond_wait@@GLIBC_2.3.2 (libpthread.so.0)
                                               #1  0x00007f95498b4465 n/a (libmozjs-52.so.0)
                                               #2  0x00007f95498b46b5 n/a (libmozjs-52.so.0)
                                               #3  0x00007f9549cb22e5 n/a (libmozjs-52.so.0)
                                               #4  0x00007f9549cd2ca2 n/a (libmozjs-52.so.0)
                                               #5  0x00007f955274208a start_thread (libpthread.so.0)
                                               #6  0x00007f955247a24f __clone (libc.so.6)
                                               
                                               Stack trace of thread 972:
                                               #0  0x00007f955274838d pthread_cond_wait@@GLIBC_2.3.2 (libpthread.so.0)
                                               #1  0x00007f95498b4465 n/a (libmozjs-52.so.0)
                                               #2  0x00007f95498b46b5 n/a (libmozjs-52.so.0)
                                               #3  0x00007f9549cb22e5 n/a (libmozjs-52.so.0)
                                               #4  0x00007f9549cd2ca2 n/a (libmozjs-52.so.0)
                                               #5  0x00007f955274208a start_thread (libpthread.so.0)
                                               #6  0x00007f955247a24f __clone (libc.so.6)
                                               
                                               Stack trace of thread 971:
                                               #0  0x00007f955274838d pthread_cond_wait@@GLIBC_2.3.2 (libpthread.so.0)
                                               #1  0x00007f95498b4465 n/a (libmozjs-52.so.0)
                                               #2  0x00007f95498b46b5 n/a (libmozjs-52.so.0)
                                               #3  0x00007f9549cb22e5 n/a (libmozjs-52.so.0)
                                               #4  0x00007f9549cd2ca2 n/a (libmozjs-52.so.0)
                                               #5  0x00007f955274208a start_thread (libpthread.so.0)
                                               #6  0x00007f955247a24f __clone (libc.so.6)
                                               
                                               Stack trace of thread 975:
                                               #0  0x00007f955274838d pthread_cond_wait@@GLIBC_2.3.2 (libpthread.so.0)
                                               #1  0x00007f95498b4465 n/a (libmozjs-52.so.0)
                                               #2  0x00007f95498b46b5 n/a (libmozjs-52.so.0)
                                               #3  0x00007f9549cb22e5 n/a (libmozjs-52.so.0)
                                               #4  0x00007f9549cd2ca2 n/a (libmozjs-52.so.0)
                                               #5  0x00007f955274208a start_thread (libpthread.so.0)
                                               #6  0x00007f955247a24f __clone (libc.so.6)
                                               
                                               Stack trace of thread 973:
                                               #0  0x00007f955274838d pthread_cond_wait@@GLIBC_2.3.2 (libpthread.so.0)
                                               #1  0x00007f95498b4465 n/a (libmozjs-52.so.0)
                                               #2  0x00007f95498b46b5 n/a (libmozjs-52.so.0)
                                               #3  0x00007f9549cb22e5 n/a (libmozjs-52.so.0)
                                               #4  0x00007f9549cd2ca2 n/a (libmozjs-52.so.0)
                                               #5  0x00007f955274208a start_thread (libpthread.so.0)
                                               #6  0x00007f955247a24f __clone (libc.so.6)
