打开系统设置时意外登出会话的问题求助

最近碰到个糟心的问题，想请大家帮忙看看：

• 不管是从右上角菜单打开系统设置，还是按Super键搜索打开，都会先弹出黑屏，紧接着就跳转到登录界面
• 重新登录后，之前的整个会话都丢失了，所有打开的程序都得重新启动

补充几个细节：

• 上次关机前我用蓝牙配对了耳机，怀疑会不会是这个操作引发的问题？
• 直到昨天一切都运行正常，我也没有更新过任何系统软件

下面是我提取的Xorg日志文件（/home/myUserName/.local/share/xorg/Xorg.0.log.old）内容：

[   463.962] (EE) Backtrace:

[   463.962] (EE) 0: /usr/lib/xorg/Xorg (OsLookupColor+0x13c) [0x555b6a607eec]

[   463.963] (EE) 1: /lib/x86_64-linux-gnu/libpthread.so.0 (funlockfile+0x60) [0x7f83bb277420]

[   463.964] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (gsignal+0xcb) [0x7f83bb0b200b]

[   463.965] (EE) 3: /lib/x86_64-linux-gnu/libc.so.6 (abort+0x12b) [0x7f83bb091859]

[   463.966] (EE) unw_get_proc_name failed: no unwind info found [-10]

[   463.966] (EE) 4: /lib/x86_64-linux-gnu/libc.so.6 (?+0x0) [0x7f83bb091729]

[   463.967] (EE) 5: /lib/x86_64-linux-gnu/libc.so.6 (__assert_fail+0x46) [0x7f83bb0a2fd6]

[   463.968] (EE) 6: /usr/lib/xorg/Xorg (DRIMoveBuffersHelper+0xc15) [0x555b6a5d23a5]

[   463.968] (EE) 7: /usr/lib/xorg/Xorg (DRI2Authenticate+0xa2) [0x555b6a5d45e2]

[   463.968] (EE) 8: /usr/lib/xorg/Xorg (DRI2GetParam+0x944) [0x555b6a5d5614]

[   463.969] (EE) 9: /usr/lib/xorg/Xorg (SendErrorToClient+0x354) [0x555b6a4a5fd4]

[   463.969] (EE) 10: /usr/lib/xorg/Xorg (InitFonts+0x3b4) [0x555b6a4aa084]

[   463.970] (EE) 11: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf3) [0x7f83bb093083]

[   463.970] (EE) 12: /usr/lib/xorg/Xorg (_start+0x2e) [0x555b6a493ace]

[   463.970] (EE)

[   463.970] (EE)

Fatal server error:

[   463.970] (EE) Caught signal 6 (Aborted). Server aborting

[   463.970] (EE)

[   463.970] (EE)

Please consult the The X.Org Foundation support

at http://wiki.x.org

for help.

[   463.970] (EE) Please also check the log file at "/home/myUserName/.local/share/xorg/Xorg.0.log" for additional information.

[   463.970] (EE)

[   463.997] (EE) Server terminated with error (1). Closing log file.

希望有大佬能帮忙分析下问题出在哪，怎么解决，谢谢大家！

备注：内容来源于stack exchange，提问作者user2342558