Some computers also allow hotplug for PCI devices. To make full use of this, special kernel modules must be loaded. However, these modules can cause problems on non-PCI hotplug computers. Unfortunately, hotplug PCI slots cannot be autodetected, so configure this function manually. To do this, set the variable HOTPLUG_DO_REAL_PCI_HOTPLUG in file /etc/sysconfig/hotplug to yes.