Usb Devices - Panasonic Toughbook CF-50 Series Reference Manual

USB Devices

USB Ports
Connecting USB devices
Connect the USB device to your computer, referring to the
operation manual of the USB device
You may need to install drivers compatible with the OS you are using for your
USB devices. Follow the on-screen instructions and refer to the operation
manual for USB devices on how to install the driver.
NOTE
USB devices may be attached or removed without turning off the
computer's power.
When a USB device is connected, there are cases the standby or
hibernation function will not operate in a normal manner due to the
USB device. In addition, a USB device may have to be removed
temporarily and the computer restarted in cases where the computer
is unable to start up properly.
Some devices will not operate when connected to a USB HUB; these
devices must be connected directly to the USB port on your computer.
When the computer enters standby or hibernation mode, or a USB
device is removed and then connected, the device may not be cor-
rectly recognized. If this happens, try removing and connecting the
device once more.
Windows 2000
When the computer enters standby or hibernation mode and then re-
sumes while a USB 1.1 device is connected, a device disconnection
warning message may appear on the screen, but this will not impede
the computer's operation.
Windows XP
If noise is generated when speakers are used with a USB connec-
tion, perform the following operations after logging on with the admin-
istrator authority.
Input [c:\util\cpupower\setup.exe] in [start] - [Run] and select [OK].
Follow the on-screen instructions.
Select [Performance] in [start] - [All Programs] - [Panasonic] - [CPU
Idle Setting] and select [OK], then [Yes].
The computer will restart automatically.
In [start] - [Control Panel] - [Performance and Maintenance] - [Power
Options], select [Always On] in [Power Schemes] and select [OK].
These operations will reduce the noise from speakers with USB con-
nections generated as a result of the CPU's power saving function,
but the noise will not be completely eliminated. Furthermore, these
operations will have no effect on noise generated due to other factors
(e.g., noise generated during periods of exceptionally high load on the
CPU, such as during video playback).
When these operations are performed, the battery running time will
be reduced to some extent. We thus recommend that when not using
speakers with USB connections, select [Battery (Windows XP Stan-
dard)] in [CPU Idle Setting], and return [Power Schemes] in [Power
Options] to [Portable/Laptop].
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