Created attachment 1029000 [details]
File: backtrace

Created attachment 1029001 [details]
File: cgroup

Created attachment 1029002 [details]
File: core_backtrace

Created attachment 1029003 [details]
File: dso_list

Created attachment 1029004 [details]
File: environ

Created attachment 1029005 [details]
File: limits

Created attachment 1029006 [details]
File: maps

Created attachment 1029007 [details]
File: mountinfo

Created attachment 1029008 [details]
File: namespaces

Created attachment 1029009 [details]
File: open_fds

Created attachment 1029010 [details]
File: proc_pid_status

Created attachment 1029011 [details]
File: var_log_messages

I inserted LP into dock, then tried to open control panel, since my secondary monitor did not switch on.

I believe these issues are related to DisplayPort MST.

This issue is reproducible with the steps Tim mentioned.
~~~
1. Attach a monitor to dock station
2. Attach the laptop to the dock
~~~

System info :
~~~
 Hostname: sbandyop.laptop
  Distro:   [redhat-release] Fedora release 22 (Twenty Two)
            [fedora-release] Fedora release 22 (Twenty Two)
            [os-release] Fedora 22 (Twenty Two) 22 (Twenty Two)
  Runlevel: N 5  (default graphical)
  SELinux:  permissive  (default permissive)
  Arch:     mach=x86_64  cpu=x86_64  platform=x86_64
  Kernel:
    Booted kernel:  4.1.6-201.fc22.x86_64
    Build version:
      Linux version 4.1.6-201.fc22.x86_64 (mockbuild.fedoraproject.org) (gcc version 5.1.1 20150618 (Red Hat 5.1.1-4) (GCC) ) #1 SMP Fri Sep 4 17:49:24 UTC 2015
    Booted kernel cmdline:
      root=/dev/mapper/fedora21-root ro rd.lvm.lv=fedora21/root rd.lvm.lv=fedora21/swap rd.luks.uuid=luks-6d85bdfc-b833-4fa4-ba5b-85f222cb7d16 rhgb quiet crashkernel=auto LANG=en_IN.UTF-8

DMIDECODE
  BIOS:
    Vend: LENOVO
    Vers: GLET77WW (2.31 )
    Date: 01/27/2015
    BIOS Rev: 2.31
    FW Rev:   1.8
  System:
    Mfr:  LENOVO
    Prod: 20AWS2A101
    Vers: ThinkPad T440p
  CPU:
    1 of 1 CPU sockets populated, 4 cores/8 threads per CPU
    4 total cores, 8 total threads
    Mfr:  Intel(R) Corporation
    Fam:  Core i7
    Freq: 2500 MHz
    Vers: Intel(R) Core(TM) i7-4710MQ CPU @ 2.50GHz
  Memory:
    16384 MB (16 GB) total
    2 of 2 DIMMs populated (system max capacity 16 GB)

~~~

dmesg
~~~
[24172.144882] thinkpad_acpi: docked into hotplug port replicator
[24172.741879] show_signal_msg: 201 callbacks suppressed
[24172.741883] gnome-shell[13329]: segfault at 0 ip 00007f7051be6392 sp 00007ffc688b8830 error 4 in libmutter.so.0.0.0[7f7051b97000+f0000]
~~~

Coredump backtrace :
~~~
{   "signal": 11
,   "executable": "/usr/bin/gnome-shell"
,   "only_crash_thread": true
,   "stacktrace":
      [ {   "crash_thread": true
        ,   "frames":
              [ {   "address": 140120384496530
                ,   "build_id_offset": 324498
                ,   "function_name": "meta_monitor_manager_xrandr_read_current"
                ,   "file_name": "/usr/lib64/libmutter.so.0.0.0"
                }
              , {   "address": 140120384474089
                ,   "build_id": "248b4c49bf9ee076f11b04ae24bc373cfeff4434"
                ,   "build_id_offset": 302057
                ,   "function_name": "meta_monitor_manager_read_current_config"
                ,   "file_name": "/usr/lib64/libmutter.so.0.0.0"
                }
              , {   "address": 140120384499056
                ,   "build_id": "248b4c49bf9ee076f11b04ae24bc373cfeff4434"
                ,   "build_id_offset": 327024
                ,   "function_name": "meta_monitor_manager_xrandr_handle_xevent"
                ,   "file_name": "/usr/lib64/libmutter.so.0.0.0"
                }
              , {   "address": 140120384484411
                ,   "build_id": "248b4c49bf9ee076f11b04ae24bc373cfeff4434"
                ,   "build_id_offset": 312379
                ,   "function_name": "x_event_source_dispatch"
                ,   "file_name": "/usr/lib64/libmutter.so.0.0.0"
                }
              , {   "address": 140120322456202
                ,   "build_id": "7c936c01704440a7500d25147101437483bf8624"
                ,   "build_id_offset": 301706
                ,   "function_name": "g_main_context_dispatch"
                ,   "file_name": "/usr/lib64/libglib-2.0.so.0.4400.1"
                }
              , {   "address": 140120322457120
                ,   "build_id": "7c936c01704440a7500d25147101437483bf8624"
                ,   "build_id_offset": 302624
                ,   "function_name": "g_main_context_iterate.isra.29"
                ,   "file_name": "/usr/lib64/libglib-2.0.so.0.4400.1"
                }
              , {   "address": 140120322457922
                ,   "build_id": "7c936c01704440a7500d25147101437483bf8624"
                ,   "build_id_offset": 303426
                ,   "function_name": "g_main_loop_run"
                ,   "file_name": "/usr/lib64/libglib-2.0.so.0.4400.1"
                }
              , {   "address": 140120384641046
                ,   "build_id": "248b4c49bf9ee076f11b04ae24bc373cfeff4434"
                ,   "build_id_offset": 469014
                ,   "function_name": "meta_run"
                ,   "file_name": "/usr/lib64/libmutter.so.0.0.0"
                }
              , {   "address": 4203517
                ,   "build_id": "d1a707f1392b0b14d89e55d272917a657dae510e"
                ,   "build_id_offset": 9213
                ,   "function_name": "main"
                ,   "file_name": "/usr/bin/gnome-shell"
                } ]
        } ]
}
~~~

--Shatadru

*** Bug 1243105 has been marked as a duplicate of this bug. ***

Another user experienced a similar problem:

Crashed on startup. Lenovo T440s with additional monitor on dock

reporter:       libreport-2.6.3
backtrace_rating: 4
cmdline:        /usr/bin/gnome-shell
crash_function: meta_monitor_manager_xrandr_read_current
executable:     /usr/bin/gnome-shell
global_pid:     3040
kernel:         4.2.3-300.fc23.x86_64
package:        gnome-shell-3.18.1-1.fc23
reason:         gnome-shell killed by SIGSEGV
runlevel:       N 5
type:           CCpp
uid:            1000

I have the same problem with my Lenovo T450s with additional monitors on a dock.

Same configuration as the previous report otherwise.

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