HP 5187-2286 manual Known Problems

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Support Note for Red Hat Linux Advanced Workstation 2.1 Operating System on Itanium® 2-based Systems

Known Problems

a. Modifying configuration options found in /usr/src/linux-version-versionnumber/configsto set values or make modules static or dynamically loadable.

b. Changing boot-time parameters found in

/usr/share/doc/kernel-doc-2.4.18/kernel-parameters.txt (with the kernel-doc

.rpm) or in /usr/src/linux-2.4/Documentation/kernel-parameters.txt (with the kernel-source /rpm.)

6.CDRW software and CD creation with Red Hat Advanced Workstation 2.1 on the zx2000.

Creating a CD using the CDRW software available in Red Hat Advanced Workstation 2.1 takes more than 12 minutes if using CD speed 24x for a 640MB file. HP recommends using CD speed 12x, which shortens creation time to 10 minutes. The command to change CD speed is: cdrecord -v speed=12 dev=2,0,0 filename.iso

Refer to online help for more details on the cdrecord command.

7.IDE support issues.

a.The zx2000 IDE controller is set to serialized accesses to the two channels (Optical and HDD). HP does not support disabling serialization for the IDE controller.

b.IDE HDD operations can take three to four times longer to complete when running simultaneously with CD-RW operation than when running without them.

8.USB conflicts and system reboots.

Configurations that include a USB 1.1 mass storage device under the same OHCI root hub as the USB keyboard can cause conflicts resulting in system reboot. You can use the "usbview" tool to view the topology of the USB root hubs to avoid such configurations. If improperly configured, refreshing the data in usbview while the USB mass storage device is being accessed may cause your system to reboot.

To view the topology using usbview:

a.Launch usbview

b.Attach the USB mass storage device

c.If usbview shows both the mass storage device and the USB keyboard under the same OHCI root hub, relocate the mass storage device to a different USB port

d.Close usbview before using the mass storage device and do not reopen it or any other applications that use usbdevfs while using the device.

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Contents Edition Legal Notices Chapter AnnouncementSupport Note Contents Distributions Supported on Itanium 2-Based Workstations Firmware Requirements Firmware Requirements and ManageabilityEnablement kit menu presents the following options Operating System InstallationRecovering your operating system Getting Updates from the Red Hat Network Known Problems Known Problems If you wish to remove this feature LABEL= Known Problems