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the-cavalry / light-locker

A simple session-locker for lightdm
GNU General Public License v2.0
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session_id is not set, is /proc mounted with hidepid>0? #169

Closed hinxx closed 3 months ago

hinxx commented 3 months ago 
user@srv07:~$ xfce4-session --version
xfce4-session 4.18.3 (Xfce 4.18)

Copyright (c) 2003-2023
    The Xfce development team. All rights reserved.

Please report bugs to <https://gitlab.xfce.org/xfce/xfce4-session>.

user@srv07:~$ light-locker --version
light-locker 1.8.0

user@srv07:~$ gdb /usr/bin/light-locker 
GNU gdb (Ubuntu 12.1-0ubuntu1~22.04) 12.1
Copyright (C) 2022 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<https://www.gnu.org/software/gdb/bugs/>.
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Reading symbols from /usr/bin/light-locker...
(No debugging symbols found in /usr/bin/light-locker)
(gdb) r
Starting program: /usr/bin/light-locker 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7ffff5f70640 (LWP 841577)]
[New Thread 0x7ffff576f640 (LWP 841578)]
[New Thread 0x7fffeffff640 (LWP 841579)]

** (light-locker:841574): ERROR **: 13:32:16.859: session_id is not set, is /proc mounted with hidepid>0?

Thread 1 "light-locker" received signal SIGTRAP, Trace/breakpoint trap.
0x00007ffff6ff2cef in g_log_structured_array () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
(gdb) b
Breakpoint 1 at 0x7ffff6ff2cef
(gdb) bt
#0  0x00007ffff6ff2cef in g_log_structured_array () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007ffff6ff2fb9 in g_log_default_handler () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffff6ff441a in g_logv () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffff6ff4703 in g_log () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x0000555555560204 in  ()
#5  0x00007ffff710dfba in g_type_create_instance () at /lib/x86_64-linux-gnu/libgobject-2.0.so.0
#6  0x00007ffff70f50ed in  () at /lib/x86_64-linux-gnu/libgobject-2.0.so.0
#7  0x00007ffff70f634d in g_object_new_with_properties () at /lib/x86_64-linux-gnu/libgobject-2.0.so.0
#8  0x00007ffff70f6e51 in g_object_new () at /lib/x86_64-linux-gnu/libgobject-2.0.so.0
#9  0x0000555555562b66 in gs_listener_new ()
#10 0x000055555555e648 in  ()
#11 0x00007ffff710dfba in g_type_create_instance () at /lib/x86_64-linux-gnu/libgobject-2.0.so.0
#12 0x00007ffff70f50ed in  () at /lib/x86_64-linux-gnu/libgobject-2.0.so.0
#13 0x00007ffff70f634d in g_object_new_with_properties () at /lib/x86_64-linux-gnu/libgobject-2.0.so.0
#14 0x00007ffff70f6e51 in g_object_new () at /lib/x86_64-linux-gnu/libgobject-2.0.so.0
#15 0x000055555555eca7 in gs_monitor_new ()
#16 0x000055555555d4d1 in main ()

user@srv07:~/Desktop$ light-locker --debug
[gs_debug_init] gs-debug.c:106 (15:31:07):   Debugging enabled
[main] light-locker.c:142 (15:31:07):    initializing light-locker 1.8.0
[main] light-locker.c:143 (15:31:07):    Platform:
gtk:        3
systemd:    yes
ConsoleKit: no
UPower:     yes
[main] light-locker.c:165 (15:31:07):    Features:
lock-after-screensaver: yes
late-locking:           yes
lock-on-suspend:        yes
lock-on-lid:            yes
settings backend:       GSETTINGS
[main] light-locker.c:198 (15:31:07):    lock after screensaver 0
[main] light-locker.c:199 (15:31:07):    late locking 0
[main] light-locker.c:200 (15:31:07):    lock on suspend 0
[main] light-locker.c:201 (15:31:07):    lock on lid 0
[main] light-locker.c:202 (15:31:07):    idle hint 0
[query_session_id] gs-listener-dbus.c:2101 (15:31:07):   org.freedesktop.login1.NoSessionForPID raised:
 PID 855889 does not belong to any known session

** (light-locker:855889): ERROR **: 15:31:07.297: session_id is not set, is /proc mounted with hidepid>0?
Trace/breakpoint trap (core dumped)

user@srv07:~/Desktop$ ps -ef | grep light
root      757850       1  0 Apr11 ?        00:00:00 /usr/sbin/lightdm
root      757856  757850  1 Apr11 tty7     00:15:36 /usr/lib/xorg/Xorg -core :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
root      757915  757850  0 Apr11 ?        00:00:00 lightdm --session-child 13 20
hinxx commented 3 months ago

A reboot of the machine helped. Now the light-locker works as expected.