HP Remote Graphics Software 5.4.0 User Guide

that contain most of the registered Vendor IDs and Device IDs. There are different documents that
contain the different registered classes and subclasses. By comparing the values of the device to these
documents, the user can verify that they are looking at the correct device and not some other device
that is also plugged into the system.
The linux-usb group keeps an up-to-date list of registered USB Vendor IDs and Device IDs. This
document resides on the
http://www.linux-usb.org site at:
http://www.linux-usb.org/usb.ids
The registered classes and subclasses are documented by the USB Device Working Group. The DWG's
latest document for 1.0 defined class codes is hosted at:
http://www.usb.org/developers/defined_class
6.5.6.4 Troubleshooting remote USB
If you have problems connecting a remote USB device from a Local Computer to a Remote Computer,
the following checklist may help identify the problem.
6.5.6.4.1 Computers supporting remote USB
Ensure that both the Remote Computer and the Local Computer support remote USB— see
Computers
supporting remote USB on page 29.
6.5.6.4.2 Supported USB devices
Verify that the USB device you’re using is supported. HP has tested a number of USB devices to verify
they work correctly when attached to a Remote Computer from a Local Computer. See
Appendix B:
USB devices supported by RGS on page 218 for a list of supported USB devices.
6.5.6.4.3 Check USB cable connections
Verify that the USB device is physically connected to the Local Computer. Check to see that it has
power and is turned on. Some devices may require that the user initiate an action before it connects.
For example, Palm PDA devices require starting a HotSync operation for the device to connect and
appear on the remote Sender system.
To further verify your connections, recognized devices on the Receiver system appear in the Proc file
system under the /proc/devices/usb_remote directory. At least two files appear in this directory for a
single connected device:
●
/proc/devices/usb_remote/devices — File contains a list of recognized devices by the Receiver
system.
●
/proc/devices/usb_remote/# — If only one USB device is recognized, the "devices" file will have
a single entry, 192. The file descriptor named 192 is the Remote USB device. Dumping this file
with 'cat 192', for example, displays specific data about device 192. This should reflect the
connected USB device. If multiple devices are connected, then each will have a file descriptor
numbered consecutively starting at 192.
6.5.6.4.4 Reset the USB device
If the USB device has a reset button, press the button. If the device is in an incorrect state, it may fail to
connect. Pressing the reset button may allow the device to connect.
ENWW
Remote USB operation
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