Sun Microsystems SUN BLADE 150, Руководство по обслуживанию, Страница: 206 / 218

E-2 Sun Blade 150 Service Manual • June 2002
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The first keyboard that gets probed at boot time becomes the console keyboard. If
multiple keyboards plugged in when the system is booted, it can be difficult to
determine which keyboard is the console keyboard.
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On a system with multiple USB keyboards, if you unplug the console keyboard,
the next available USB keyboard does not become the console keyboard. The next
hot plugged keyboard will become the console keyboard.
E.1.0.2 Mouse Devices
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Only a 2- or 3-button mouse is supported. A wheel-on-wheel mouse acts like a
plain button mouse. A mouse with more than 3 button functions like a 3-button
mouse.
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Multiple mice are not supported. Additional mouse devices enumerate and are
usable, but do not operate as a console mouse.
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The first mouse probed at boot time becomes the console mouse. This can
potentially cause confusion if there are multiple mouse devices plugged in at boot
time.
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If you have a third-party composite keyboard with PS/2 mouse, and it is the first
one to be probed, it will become the console keyboard/mouse even if the PS/2
mouse is not plugged in.
Note – If another USB mouse is plugged into the system, it will not work because
the second mouse is not configured as the console mouse.
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On a system with more than one USB mouse, if you unplug the console mouse,
the next available USB mouse doesn’t become the console mouse. The next hot
plugged mouse will become the console mouse.
E.2 USB Power Management
USB power management is leaf first and then bottoms-up. This means that all leaf
devices go into low-power mode first. Following that, the lowest hub goes into low-
power mode first, followed by hubs in the next upper level. This follows all the way
to the top root hub.
Note –
As a rule of thumb, the deeper the USB device tree, the poorer USB power
management becomes.