.
Thread 1 (Thread 0x7f896550a900 (LWP 666)):
#0  0x00007f89650f9da0 in __read_nocancel () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007f8965570fc3 in __read_alias () at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
        __nbytes = 4096
        __buf = 0x7ffd8e8f8550
        __fd = 19
#2  udev_device_get_sysattr_value (udev_device=0x7f8966729660, sysattr=0x7f89655a01c8 "status") at ../src/libudev/libudev-device.c:1486
        list_entry = <optimized out>
        path = "/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-DP-1/status\000\003", '\000' <repeats 14 times>, "`\321rf\211\177\000\000@\353qf\211\177\000\000\000\000\000\000\000\000\000\000\t6We\211\177\000\000\204\003\000\000\000\000\000\000\251\227\332d\211\177\000\000\360\313rf\211\177\000\000\000\241\067F\a \324j\340\225\217\216\375\177\000\000\060\202\217\216\375\177\000\000\340\225\217\216\375\177\000\000`\225\217\216\375\177\000\000@\353qf\211\177\000\000\230UWe\211\177\000\000(\202\217\216\375\177\000\000"...
        value = "disconnected\n\177\000\000\274\205\217\216\375\177\000\000h?Xe\211\177\000\000\024\000\000\000\004\000\000\000\210\205\217\216\375\177\000\000\240\205\217\216\375\177\000\000\032\063Ye\211\177\000\000\260\205\217\216\375\177\000\000\250\205\217\216\375\177\000\000\300\205\217\216\375\177\000\000\362\062Ye\211\177\000\000\000\000\000\000\000\000\000\000\023\000\000\000\377\377\377\377\000\000\000\000\000\000\000\000F\000\000\000\000\000\000\000`\321rf\211\177\000\000`4\016e\211\177", '\000' <repeats 11 times>, "\241\067F\a \324j`\321rf\211\177\000\000\241\000\000\000\000\000\000\000\201ypq\002\200\377\377\v\000\000\000\000\000\000\000\002\000\000\000\000\000\000\000"...
        statbuf = {st_dev = 16, st_ino = 20334, st_nlink = 1, st_mode = 33060, st_uid = 0, st_gid = 0, __pad0 = 0, st_rdev = 0, st_size = 4096, st_blksize = 4096, st_blocks = 0, st_atim = {tv_sec = 1426123529, tv_nsec = 142483041}, st_mtim = {tv_sec = 1426123529, tv_nsec = 142483041}, st_ctim = {tv_sec = 1426123529, tv_nsec = 142483041}, __glibc_reserved = {0, 0, 0}}
#3  0x00007f896558cf5d in manager_count_displays (m=<optimized out>) at ../src/login/logind-core.c:539
        d = 0x7f8966729660
        p = 0xd
        status = 0xd <error: Cannot access memory at address 0xd>
        e = 0x7f896672d520
        item = 0x7f8966724b80
        r = 13
        n = 0
#4  manager_is_docked_or_multiple_displays (m=<optimized out>) at ../src/login/logind-core.c:558
No locals.
#5  button_lid_switch_handle_action.lto_priv.339 (manager=0x7f896671c060, is_edge=80) at ../src/login/logind-button.c:106
        handle_action = 4096
        __PRETTY_FUNCTION__ = "button_lid_switch_handle_action"
#6  0x00007f896558d0ec in button_recheck.lto_priv.336 (e=<optimized out>, userdata=<optimized out>) at ../src/login/logind-button.c:120
        b = <optimized out>
        __PRETTY_FUNCTION__ = "button_recheck"
#7  0x00007f8965570582 in source_dispatch (s=0x7f89667292d0) at ../src/libsystemd/sd-event/sd-event.c:2156
        __PRETTY_FUNCTION__ = "source_dispatch"
        __func__ = "source_dispatch"
#8  0x00007f8965572dae in sd_event_dispatch (e=0x7f896671d210) at ../src/libsystemd/sd-event/sd-event.c:2473
        p = <optimized out>
        r = <optimized out>
        e = 0x7f896671d210
        __PRETTY_FUNCTION__ = "sd_event_dispatch"
#9  0x00007f896553bea3 in sd_event_run (timeout=<optimized out>, e=<optimized out>) at ../src/libsystemd/sd-event/sd-event.c:2502
        r = 13
#10 manager_run (m=<optimized out>) at ../src/login/logind.c:1119
        us = 18446744073709551615
#11 main (argc=19, argv=0x7ffd8e8f8550) at ../src/login/logind.c:1181
        m = 0x7f896671c060
        r = 1718735376
        __func__ = "main"