Appendix A. General Parameters and Modules
This appendix is provided to illustrate some of the
possible parameters available for common hardware device
drivers, which under Red Hat Linux are called kernel
modules. In most cases, the default parameters will
work. However, there may be times when extra module parameters are
necessary for a device to function properly or if it is necessary to
override module's default parameters for the device.
During installation, Red Hat Linux uses a limited subset of device drivers to
create a stable installation environment. Although the installation
program supports installation on many different types of hardware, some
drivers (including those for SCSI adapters, network adapters, and many
CD-ROM drives) are not included in the installation kernel. Rather, they
must be loaded as modules by the user at boot time. For information on
where one can find extra kernel modules during the installation process,
refer to the section concerning alternative boot methods in the chapter
titled Steps to Get You Started in the
Red Hat Linux Installation Guide.
Once installation is completed, support exists for a large number of
devices through kernel modules.
A.1. Specifying Module Parameters
In some situations, it may be necessary to supply parameters to a module
as it is loaded in order for it so function properly. This can be done in
one of two ways:
Specify a full set of parameters in one statement. For example, the
parameter cdu31=0x340,0 could be
used with a Sony CDU 31 or 33 at port 340 with no IRQ.
Specify the parameters individually. This method is used when one or
more parameters in the first set are not needed. For example,
cdu31_port=0x340 cdu31a_irq=0 can
be used as the parameter for the same CD-ROM. An
OR is used in the CD-ROM, SCSI, and Ethernet
tables in this appendix to show where the first parameter method
stops and the second method begins.
Only use one method, and not both, when loading a module with specific
When a parameter has commas, be sure not
to put a space after a comma.