FreeBSD 13-RC2 on Lenovo ThinkPad T450, suspend/resume doesn't always work.

When the resume doesn’t work in the /var/log/Xorg.0.log file there are
these error messages:


[  3677.281] (EE)

[  3677.281] (EE) Backtrace:

[  3677.284] (EE) 0: /usr/local/bin/Xorg (?+0x0) [0x41e2aa]

[  3677.285] (EE) 1: /lib/libthr.so.3 (_pthread_sigmask+0x54e) [0x80093358e]

[  3677.287] (EE) 2: /lib/libthr.so.3 (_pthread_setschedparam+0x82f)
[0x800932b3f]

[  3677.289] (EE) 3: ? (?+0x0) [0x7ffffffff8a3]

[  3677.291] (EE) 4: /lib/libc.so.7 (__sys_thr_kill+0xa) [0x800a7e33a]

[  3677.293] (EE) 5: /lib/libthr.so.3 (_pthread_setschedparam+0x6f0)
[0x800932a00]

[  3677.295] (EE) 6: ? (?+0x0) [0x0]

[  3677.297] (EE) 7: /lib/libc.so.7 (__raise+0x34) [0x8009f6c74]

[  3677.297] (EE) unw_step failed: unspecified (general) error [-1]

[  3677.297] (EE)

[  3677.297] (EE)

Fatal server error:

[  3677.297] (EE) Caught signal 6 (Abort trap). Server aborting

[  3677.297] (EE)

[  3677.297] (EE)

Please consult the The X.Org Foundation support

     at http://wiki.x.org

 for help.

[  3677.297] (EE) Please also check the log file at "/var/log/Xorg.0.log"
for additional information.

[  3677.297] (EE)

[  3677.298] (EE) Server terminated with error (1). Closing log file.

What can I do ?

Thanks in advance

–

Maurizio