FreeBSD 16.0 shutdown problems, often involving the system hanging instead of powering off (especially with UEFI), usually stem from ACPI or UEFI/BIOS miscommunication; solutions include adding
hw.efi.poweroff=0 to /boot/loader.conf,
updating BIOS/firmware, adjusting ACPI tunables like
hw.acpi.disable_on_reboot,
or checking system logs for driver conflicts (like USB issues) or missing CPU temp monitoring (coretemp/amdtemp), as shutdown -p now relies on cooperation between the OS and hardware.
/etc/rc.conf:
##############################################
# powerd: adaptive speed while on AC power, adaptive while on battery power
powerd_enable=”YES”
powerd_flags=”-a adaptive -b adaptive -n adaptive -i 85 -r 75 -p 500″#http://wiki.freebsd.org/TuningPowerConsumption
performance_cx_lowest=”C2″
performance_cpu_freq=”800″
economy_cx_lowest=”C2″
economy_cpu_freq=”NONE”
##############################################/boot/device.hints
#JES
#Problem with powerd (no decrease freq, always max)
#http://markmail.org/message/vb7bjn5m7ughralg#query:freebsd%20powerd%20no%20decrease%20frequency+page:1+mid:cmd4aovw5ff6ojge+state:results
#http://old.nabble.com/Dell-Precision-m4400-acline-problems-td28941873.html
#http://wiki.freebsd.org/TuningPowerConsumption
hint.p4tcc.0.disable=”1″
hint.acpi_throttle.0.disable=”1″
hint.p4tcc.1.disable=”1″
hint.acpi_throttle.1.disable=”1″/boot/loader.conf
################
#JES
u3g_load=”YES”
umass_load=”YES”
acpi_ibm_load=”YES”
cpufreq_load=”YES”
With this settings my top processes are:
last pid: 76103; load averages: 0.36, 0.26, 0.32 up 0+00:59:44 10:12:11
128 processes: 1 running, 127 sleeping
CPU: 5.1% user, 0.0% nice, 2.6% system, 0.0% interrupt, 92.3% idle
Mem: 378M Active, 375M Inact, 461M Wired, 3132K Cache, 410M Buf, 2638M Free
Swap: 6067M Total, 6067M FreePID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
2943 root 1 50 0 598M 441M select 1 7:25 14.26% Xorg
4016 jjess 3 62 0 326M 164M ucond 0 1:35 2.88% opera
3124 jjess 2 47 0 165M 25756K piperd 0 0:19 0.00% gnome-terminal
3931 jjess 1 49 0 32444K 6064K select 1 0:14 0.00% conky
3133 jjess 1 44 0 127M 31584K select 0 0:10 0.00% compiz