After start my notebook Dell Latitude E6400 with Fedora 22 in docking station, freeze after few second. Every logs was clear, system was running just a few second, and then failed. After some time of searching I find where was problem - in kernel module acpi-cpufreq

The solution is in block automatically install module after boot. So we will just add module to file /etc/modprobe.d/… Edit this file (like root of course):

nano /etc/modprobe.d/blacklist-visor.conf

And add this line to a file:

blacklist  acpi-cpufreq

So this thing will solve the problem with freezing. But if notebook run on the battery, we want to have module install. So we will make after boot script for that. Edit file /etc/rc.d/rc.local:

nano /etc/rc.d/rc.local

And add thist script to file:

#!/bin/bash
 
echo "Start of rc.local -----------"
if [ "$(lsusb | grep "Dell Computer Corp. internal USB Hub of E-Port Replicator")" ]; then
 
	modprobe -r acpi_cpufreq && echo OK || echo failed
else
	echo -n "Je mimo dokinu - instaluju modul: "
	modprobe acpi_cpufreq && echo OK || echo failed
fi
echo "Natažené moduly:"
lsmod
echo "End of rc.local."

Save it and restart. This solution will be working well, if we will not plugging and removing notebook from dock with running system.