modinfo is nice for inspecting kernel modules and what configuration
parameters they accept. For instance, these are the power saving
optoins of the iwlwifi driver for my Intel Wifi card:
# modinfo iwlwifi | grep power_
parm: power_save:enable WiFi power management (default: disable) (bool)
parm: power_level:default power save level (range from 1 - 5, default: 1) (int)
However, modinfo doesn't list the active value of the power_save
parameter. For that, you'll have to query the /sys file system:
/sys/module/iwlwifi/parameters/power_level:0
/sys/module/iwlwifi/parameters/power_save:N
Now that correspond better to what I'd set in my modprobe.conf.d:
# cat /etc/modprobe.d/iwlwifi.conf .
options iwlwifi power_save=0
