Reference Guide

Table Of Contents
Important Information 11
Important Information
This section provides information about the issues you may encounter when
you are installing or using Red Hat Enterprise Linux 5 on your computer.
X Multimedia System (XMMS) Media Player May Not Play Certain .wav
or .ogg Files
The XMMS Media Player with ADI 1984 Codec does not play certain .wav
or .ogg files. This issue does not affect the CD audio playback and nor does it
occur with Helix Media Player.
Command line media players such as aplay and ogg123 can play all .wav
and .ogg files.
A fix for this issue is expected in a future Red Hat Enterprise Linux update.
IEEE1394 FireWire Support
Drivers for IEEE1394 FireWire storage devices are not compiled and
included with the Red Hat Enterprise Linux 5 kernels. To enable FireWire
support, download the latest IEEE1394 FireWire device driver RPM from
the Dell Support website at support.dell.com.
swiotlb Parameter Needs to be Set for nVidia Video Driver With EM64T
for Systems With Greater Than 4 GB RAM
When using Red Hat Enterprise Linux 5 x86_64 with the OpenGL nVidia
video driver on systems with more than 4 GB of RAM, a kernel panic may
occur while running 3-D applications. This is caused by memory allocation
problems when using a 32-bit address-only capable device with a 64-bit
operating system with greater than 4 GB of RAM. If you are using the Dell-
nVidia driver available on the Dell Support website at support.dell.com, this
problem is resolved by the RPM. If you are using the nVidia OpenGL driver
downloaded from www.nvidia.com, complete the following steps to avoid
this issue:
1
Open the
/boot/grub/grub.conf
file in an editor.
2
On a running system, add
swiotlb=65536
to the end of each line
that begins with
kernel
.
3
Save the file and reboot the system.
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