[Bug 240729] ThinkPad T420s - suspend/resume does not work

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=240729

            Bug ID: 240729
           Summary: ThinkPad T420s - suspend/resume does not work
           Product: Base System
           Version: 12.1-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: vermaden at interia.pl

Created attachment 207681
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=207681&action=edit
dmesg.out

Just updated to 12.1-RELEASE - as in title - suspend/resume does not work.
Suspend part works. Resume hangs with endless cycle of lights on an off. Screen
dead all the time when trying to resume.

The suspend/resume worked on 11.3-RELEASE from which I upgraded.

I have attached these:

1. pciconf -lv output.
2. dmesg output.
3. /boot/loader.conf
4. /etc/sysctl.conf
5. /etc/rc.conf

What else do you need?

Regards,
vermaden

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