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RACKMOUNT SERVSWITCH™ BRAND CAT5 KVM EXTENDER LOCAL HUBS
If this happens in some mouse extender/switch systems, the only solution is to
either kill and reload the mouse driver or reboot the PC. But the Rackmount
Extender has a feature you can use to painlessly recover from this kind of glitch.
First try to reset the mouse as described in
Section 7.3.1
. If this doesn’t work, send
the “Null Mouse Command” in order to resynchronize the CPU’s mouse port. In a
Single-Access non-serial Extender link with a Switching Remote Unit (ACU1006RA
or ACU1012RA to ACUREMSW) or a KVM/Serial/Audio link (ACU1006VRA to
ACUVREM, ACUWREM, or ACU1006MRVA), press and release the hotkey, then
press and release the left-arrow (number 4) key on the keyboard’s numeric keypad
(
not
the number 4 on the top row of the keyboard). For any other type of Extender
link, take these steps:
1. Press and hold down both the left and right mouse buttons.
2. Press and release the [Scroll Lock] key on the associated keyboard, then
release the mouse buttons.
3. Check mouse operation.
4. If the mouse isn’t yet operating correctly, repeat steps 1 through 3 as many as
two more times. (If this still doesn’t help, call Black Box Technical Support.)
When the Rackmount Extender receives the Null Mouse command, it sends a “null
byte” of mouse data to the corresponding CPU; this has no effect other than to get
the CPU “caught up” with the mouse. You might have to issue the command as
many as three times in order to get a PC with a 4-byte mouse back on track. Note
that, unless your mouse driver is an auto-correcting type, sending this command
while the mouse is in sync will throw it out of sync.
If the PS/2 mouse frequently gets out of sync in your system, and you are
running Windows 95/98/2000, Windows
®
Me, Windows NT
®
, or Windows XP, we
recommend that you install the latest Microsoft mouse driver on your PC, or even
the Microsoft IntelliMouse driver (regardless of whether you are actually using an
IntelliMouse or not). The Rackmount Extender will translate the mouse signals for
the IntelliMouse driver, and the driver will auto-correct the synching problem if
you let go of the mouse for a second or two.