Comment 22 for bug 1203211

More: the "--list" and "-l" options do not even appear in the help:

$modprobe --help
Usage:
 modprobe [options] [-i] [-b] modulename
 modprobe [options] -a [-i] [-b] modulename [modulename...]
 modprobe [options] -r [-i] modulename
 modprobe [options] -r -a [-i] modulename [modulename...]
 modprobe [options] -c
 modprobe [options] --dump-modversions filename
Management Options:
 -a, --all Consider every non-argument to
                             be a module name to be inserted
                             or removed (-r)
 -r, --remove Remove modules instead of inserting
     --remove-dependencies Also remove modules depending on it
 -R, --resolve-alias Only lookup and print alias and exit
     --first-time Fail if module already inserted or removed
 -i, --ignore-install Ignore install commands
 -i, --ignore-remove Ignore remove commands
 -b, --use-blacklist Apply blacklist to resolved alias.
 -f, --force Force module insertion or removal.
                             implies --force-modversions and
                             --force-vermagic
     --force-modversion Ignore module's version
     --force-vermagic Ignore module's version magic

Query Options:
 -D, --show-depends Only print module dependencies and exit
 -c, --showconfig Print out known configuration and exit
 -c, --show-config Same as --showconfig
     --show-modversions Dump module symbol version and exit
     --dump-modversions Same as --show-modversions

General Options:
 -n, --dry-run Do not execute operations, just print out
 -n, --show Same as --dry-run
 -C, --config=FILE Use FILE instead of default search paths
 -d, --dirname=DIR Use DIR as filesystem root for /lib/modules
 -S, --set-version=VERSION Use VERSION instead of `uname -r`
 -s, --syslog print to syslog, not stderr
 -q, --quiet disable messages
 -v, --verbose enables more messages
 -V, --version show version
 -h, --help show this help