Thinkpad X230 suspend/resume under FreeBSD 11.1

Installing FreeBSD 11.1 on Lenovo Thinkpad X230 laptop is not working 
out-of-the-box even in 21. century.  Suspend/resume doesn't work in default
install. 


It's neccessary to put:


#use vt instead of syscons
kern.vty=vt
#lenovo kernel drivers (suspend button doesn't work after)
acpi_ibm_load="YES"
acpi_video_load="YES"
i915kms_load="YES"

in /boot/loader.conf

and 

hw.pci.do_power_suspend=0
hw.pci.do_power_resume=1
hw.pci.do_power_nodriver=3
#suspend when lid is closed
hw.acpi.lid_switch_state=S3

in /etc/sysctl.conf

There is a nasty bug hidding the success of this settings -- if you make
laptop sleep in first console (ttyv1), screen stays dark after resume. Just
switch to another ttyv (ALT+F2 or something) and voila!

Thanks to Michael Cardell Widerkrantz for advices!


EOF

Comments requested

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