N
Noone
Win XP Home and Pro (both on numerous 'puters with same issue). All Dell P4
Northwoods and Prescotts with 865 and 915 chipsets. S3 and S4
powermanagement works fine in these boxes until I use a USB keyboard and
configure it to be able to wake the computer from sleep. S4 (Hibernation is
not affected). Then the PSU fan and the PROC fan won't shut down but keeps
spinning until the timeout for S4 occurs. Then Hibernation operates as it
should. Note, the HDD spins down and the monitor goes black but the fans
spin on. This does not happen with a PSU keyboard. And only happens with a
USB keyboard when configured to have the ability to wake the computer from
sleep. Diabling this feature allows the computer to enter S3 properly
complete with fans spinning down. But then the 'puter must be awakened by
the front panel power button because the keyboard's funtion in this regard
is disabled.
So I learned that Pin #9 is +5 volts VSB (Voltage Stand By). And it's
adjacent pin, #19 (on a 20 pin connector) and #21 (on a 24 pin connector) is
a +5 volt full time voltage. Some MOBO's have a jumper to allow choice
between +5 volt VSB and +5 VOLT continous voltage. This choice, as I
understand, allows the keyboard and mice or whatever is plugged into the
rear USB (main) ports to either have continous power or Voltage Stand By.
The problem is that USB keyboards require continous voltage to have ability
to use the wake-up function in their powermanagement tab and still allow the
motherboard (i.e. read...Fans) to shut down with S3 powermanagement. Problem
is my Dell keyboard does not have this jumper. So my question for any of you
smart people out there is: Can I switch the MOBO connectors listed above and
achieve the same thing as if I had a jumper to choose which power flowed to
the USB ports. I will appreciate any logical reply.
Northwoods and Prescotts with 865 and 915 chipsets. S3 and S4
powermanagement works fine in these boxes until I use a USB keyboard and
configure it to be able to wake the computer from sleep. S4 (Hibernation is
not affected). Then the PSU fan and the PROC fan won't shut down but keeps
spinning until the timeout for S4 occurs. Then Hibernation operates as it
should. Note, the HDD spins down and the monitor goes black but the fans
spin on. This does not happen with a PSU keyboard. And only happens with a
USB keyboard when configured to have the ability to wake the computer from
sleep. Diabling this feature allows the computer to enter S3 properly
complete with fans spinning down. But then the 'puter must be awakened by
the front panel power button because the keyboard's funtion in this regard
is disabled.
So I learned that Pin #9 is +5 volts VSB (Voltage Stand By). And it's
adjacent pin, #19 (on a 20 pin connector) and #21 (on a 24 pin connector) is
a +5 volt full time voltage. Some MOBO's have a jumper to allow choice
between +5 volt VSB and +5 VOLT continous voltage. This choice, as I
understand, allows the keyboard and mice or whatever is plugged into the
rear USB (main) ports to either have continous power or Voltage Stand By.
The problem is that USB keyboards require continous voltage to have ability
to use the wake-up function in their powermanagement tab and still allow the
motherboard (i.e. read...Fans) to shut down with S3 powermanagement. Problem
is my Dell keyboard does not have this jumper. So my question for any of you
smart people out there is: Can I switch the MOBO connectors listed above and
achieve the same thing as if I had a jumper to choose which power flowed to
the USB ports. I will appreciate any logical reply.