Comment 30 for bug 1179282

Look at i8k.c code.

When accessing via i8k_is_visible it's OK:

        if (index >= 4 && index <= 5 &&
            !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN1))
                return 0;

But when accessing via /proc/i8k fan speed is always read, even if system has no fan.