Owner's Manual

28 Installation Instructions and Important Information
Loss of IDE Device Functionality When DRAC 4 is Present
Systems with newer Intel chipsets (ICH6, ICH7, and so on) with a DRAC 4
installed may lose functionality of their IDE devices. A workaround for this
problem is to pass the following parameter to the kernel command line at
system boot:
linux ide2=0x1f0
A fix for this issue is available in Red Hat Enterprise Linux 4 Update 7.
Kernel Panic When Unloading ide-scsi Module
If the deprecated ide-scsi module is loaded to use an IDE CD drive, a kernel
panic my occur upon unloading the module. To avoid this problem, use the
ide-cd module for IDE CD drives.
A fix for this issue is available in Red Hat Enterprise Linux 4 Update 7.
Cannot Input Through DRAC III Console When Keyboard is Not Attached
DRAC III console input does not work properly on systems running Red Hat
Enterprise Linux 4 if a keyboard is not connected at system boot. This issue
occurs because console redirection on the DRAC III depends on the PS2
driver being loaded, and this driver is not loaded if a keyboard is not present.
To fix this issue, manually load the keyboard driver module.
A workaround for this issue is to append the following parameter to the kernel
command line at system boot:
i8042.dumbkbd=1
A fix for this issue is available in Red Hat Enterprise Linux 4 Update 7.
Support of NX Might Cause Segmentation Fault in Third-Party Applications
Some Dell systems support the No Execute (NX) feature offered with some
Intel processors. By default, Red Hat Enterprise Linux 4 uses NX support,
which might result in unexpected segmentation violations (SEGV) with some
third-party applications that you may have installed.
Applications that attempt to execute code on their process stacks or in pages
of memory allocated or mapped without the EXEC attribute causes a SEGV
signal to be sent to the process.
RHELIIG.book Page 28 Thursday, April 14, 2011 12:15 PM