Microsoft Mouse stays lit when computer is off. (A8N-SLI Premium)

[HST]

I already know now that the A8N-SLI Premium has a power LED that stays
lit when the computer is off and it is normal but when I shut down the
computer the Microsoft Intelli-mouse light stays lit, what gives and
how do I rectify it?

HST

geezzz, one problem after the other )

 

[jroc]

I already know now that the A8N-SLI Premium has a power LED that stays
lit when the computer is off and it is normal but when I shut down the
computer the Microsoft Intelli-mouse light stays lit, what gives and
how do I rectify it?

HST

geezzz, one problem after the other )

I have the Optical Wireless Mouse 2.0...and its connected via USB2....the
Transmitter turns off..when I power off...but of course the mouse has separate
batteries..but goes into the 'power saving mode' (very dim red light)...I'm on a
ASUS A7V333.

"De Oppresso Liber"
From Oppression Liberate

jroc® 7th Special Forces Ft.Bragg N.C 18/Bravo
****only thing easy in life is failure****
*******so get tough*******

 

[R. B.]

I already know now that the A8N-SLI Premium has a power LED that stays
lit when the computer is off and it is normal but when I shut down the
computer the Microsoft Intelli-mouse light stays lit, what gives and
how do I rectify it?

HST

geezzz, one problem after the other )

Go into the bios to power, then to APM Configuration and set the Restore on
AC power loss to [Enabled]. Both of your problems will go away. no more
green light on after you shut down and the mouse light will go out. You will
also save power. Set your surge protector so that all of your components
will be on when you turn on the master switch. You will also save the wear
and tear on all the switches except the master on the surge protector.Use
the master switch to turn on and off your computer. I run ever computer that
I build like this. No problems. Hope this helps.
R. B.

 

[Mercury]

This setting is for use when you have a UPS. It means that if the system is
shutdown by a UPS (Power Loss) restore the system state to the prior state.
IE if the system was running, restart it, if the system was powered off ,
leave it off.

If you do not have a UPS, it is best to have it disabled as otherwise if you
have a rapid series of power failures you will blow up your system - just
like repeatedly turning the power for a light on and off will blow it.

The OP's mouse problem actually sounds like normal behaviour - the mouse
will go idle and turn off the light, but if it is moved it will turn on. One
of the Wake on xxxx settings may disable it.

I already know now that the A8N-SLI Premium has a power LED that stays
lit when the computer is off and it is normal but when I shut down the
computer the Microsoft Intelli-mouse light stays lit, what gives and
how do I rectify it?

HST

geezzz, one problem after the other )

Go into the bios to power, then to APM Configuration and set the Restore
on AC power loss to [Enabled]. Both of your problems will go away. no
more green light on after you shut down and the mouse light will go out.
You will also save power. Set your surge protector so that all of your
components will be on when you turn on the master switch. You will also
save the wear and tear on all the switches except the master on the surge
protector.Use the master switch to turn on and off your computer. I run
ever computer that I build like this. No problems. Hope this helps.
R. B.

 

[Paul]

I already know now that the A8N-SLI Premium has a power LED that stays
lit when the computer is off and it is normal but when I shut down the
computer the Microsoft Intelli-mouse light stays lit, what gives and
how do I rectify it?

HST

geezzz, one problem after the other )

For many other motherboards, the answer to this question would be
simple. Usually an Asus motherboard has USBPWxx jumper blocks.
The xx would be 12, 34, 56, as appropriate for the pair of USB
ports it controls. USBPW jumper blocks allow the user to select
powering of the USB port by the +5V source of power (which switches
off when the computer sleeps) or by the +5VSB source of power (which
continues to run when the computer sleeps).

+5VSB is the one to use, when you need a USB keyboard powered, to
do "wake by keyboard" or the like.

Now, we come back to the A8N-SLI. Lo and behold, I see no USBPWxx
jumper blocks! It sounds like your USB headers and rear USB ports are
permanently wired to +5VSB, and that is why the mouse is still
lit. On the plus side, this makes the "wakeup" function easier
to get working (and Asus saves a whole $0.15, by not having to
place 15 jumper pins on the board for five USBPWxx header blocks).

I wonder if the selection of +5V or +5VSB is now made in software ?
I'd say you have a good deal of research ahead of you, to find an
answer to that :-(

Phone up Asus tech support and ask them if there is an option to
change how USB is powered. I don't see any mention of this issue
on the Asus FAQ page. If all ten of the USB ports have been
set up to run from +5VSB, and each one draws 500 milliamps (the
spec max), this will crush all power supplies (most PSUs only have
2 amps to offer on +5VSB), so if the USB powering option cannot be
changed, this strikes me as a dumb design decision.

http://support.asus.com.tw/faq/faq.aspx?SLanguage=en-us

Paul

 

[R. B.]

This setting is for use when you have a UPS. It means that if the system
is shutdown by a UPS (Power Loss) restore the system state to the prior
state. IE if the system was running, restart it, if the system was powered
off , leave it off.

If you do not have a UPS, it is best to have it disabled as otherwise if
you have a rapid series of power failures you will blow up your system -
just like repeatedly turning the power for a light on and off will blow
it.

The OP's mouse problem actually sounds like normal behaviour - the mouse
will go idle and turn off the light, but if it is moved it will turn on.
One of the Wake on xxxx settings may disable it.

When you have the surge protector off you can have a million power failures
and it will not affect your computer
because it if off. now power to it.
R. B.

I already know now that the A8N-SLI Premium has a power LED that stays
lit when the computer is off and it is normal but when I shut down the
computer the Microsoft Intelli-mouse light stays lit, what gives and
how do I rectify it?

HST

geezzz, one problem after the other )

Go into the bios to power, then to APM Configuration and set the Restore
on AC power loss to [Enabled]. Both of your problems will go away. no
more green light on after you shut down and the mouse light will go out.
You will also save power. Set your surge protector so that all of your
components will be on when you turn on the master switch. You will also
save the wear and tear on all the switches except the master on the surge
protector.Use the master switch to turn on and off your computer. I run
ever computer that I build like this. No problems. Hope this helps.
R. B.

 

[HST]

Now, we come back to the A8N-SLI. Lo and behold, I see no USBPWxx
jumper blocks! It sounds like your USB headers and rear USB ports are
permanently wired to +5VSB, and that is why the mouse is still
lit. On the plus side, this makes the "wakeup" function easier
to get working (and Asus saves a whole $0.15, by not having to
place 15 jumper pins on the board for five USBPWxx header blocks).

damn, maybe I forgot to mention that it's not a USB mouse but a PS2
good old green round connection instead.

HST

 

[milleron]

For many other motherboards, the answer to this question would be
simple. Usually an Asus motherboard has USBPWxx jumper blocks.
The xx would be 12, 34, 56, as appropriate for the pair of USB
ports it controls. USBPW jumper blocks allow the user to select
powering of the USB port by the +5V source of power (which switches
off when the computer sleeps) or by the +5VSB source of power (which
continues to run when the computer sleeps).

+5VSB is the one to use, when you need a USB keyboard powered, to
do "wake by keyboard" or the like.

Now, we come back to the A8N-SLI. Lo and behold, I see no USBPWxx
jumper blocks! It sounds like your USB headers and rear USB ports are
permanently wired to +5VSB, and that is why the mouse is still
lit. On the plus side, this makes the "wakeup" function easier
to get working (and Asus saves a whole $0.15, by not having to
place 15 jumper pins on the board for five USBPWxx header blocks).

I wonder if the selection of +5V or +5VSB is now made in software ?
I'd say you have a good deal of research ahead of you, to find an
answer to that :-(

Phone up Asus tech support and ask them if there is an option to
change how USB is powered. I don't see any mention of this issue
on the Asus FAQ page. If all ten of the USB ports have been
set up to run from +5VSB, and each one draws 500 milliamps (the
spec max), this will crush all power supplies (most PSUs only have
2 amps to offer on +5VSB), so if the USB powering option cannot be
changed, this strikes me as a dumb design decision.

http://support.asus.com.tw/faq/faq.aspx?SLanguage=en-us

Paul

I have no background in electronics, so these things aren't intuitive
for me. Please forgive me if this question is stupid, but if we're
saying that each of 10 USB port "draws one half amp," aren't we saying
that there's current flowing? Where is all that current going? Would
5 amps at 5 volts, generate 25 watts worth of heat?
Ron

 

[Tim]

*can*.
The architectural limit is 1 amp.
It is important not to overload a connection (obviously).
The power jumpers that Paul mentions may do the trick.

 

[Robert Hancock]

Phone up Asus tech support and ask them if there is an option to

change how USB is powered. I don't see any mention of this issue
on the Asus FAQ page. If all ten of the USB ports have been
set up to run from +5VSB, and each one draws 500 milliamps (the
spec max), this will crush all power supplies (most PSUs only have
2 amps to offer on +5VSB), so if the USB powering option cannot be
changed, this strikes me as a dumb design decision.

I believe there is a BIOS setting that controls this - at least I have
not noticed any USB devices remaining powered with the system off on my
board which has all the wakeup options disabled. I don't know about PS/2
devices as the poster is apparently using, however.

 

[Roger Hamlett]

I have no background in electronics, so these things aren't intuitive
for me. Please forgive me if this question is stupid, but if we're
saying that each of 10 USB port "draws one half amp," aren't we saying
that there's current flowing? Where is all that current going? Would
5 amps at 5 volts, generate 25 watts worth of heat?
Ron

Somewhere yes.
However, available power doesn't have to be 'drawn'. A USB port, is
allowed to draw 100mA max, then the OS is allowed to 'authorise' up to
500mA to be drawn by a device. Things like USB 2.5" HD's need all of this,
while things like mice only draw a few mA. Most systems don't implement
the originally envisaged 'switching', to actually change the power
available, instead just having a relatively simple self resetting fuse on
the USB power line.
The power supply on your computer is probably able to deliver well over
300W, and if it was delivering this, it'd all end up as heat somewhere
(most in the HD's, video card, processor etc.), but typically most
computers 'only' draw about 120W, in 'normal' operation.
Now the poster was pointing out that if all USB ports remain powered off
the standby line, and all were in use, with devices potentially able to
draw the maximum current, the supply would need to be able to deliver 5A
just to feed these devices.
Leaving power on some ports, is 'normal', snce it is required if you have
a USB keyboard/mouse, and want to implement 'keyboard' wake-up from
suspend. Similarly, modem wake-up, if using a USB modem, requires this.
The normal 'practice', is to have just two of the ports connected to the
+5SB line, and the rest from the 'main' supply line. Some motherboards go
a little further, and allow you to 'jumper' this option, while others have
it software enabled, if these wake-up options are selected in the BIOS.
For some 'unfathomable' reason, On the particular boards concerned, Asus
appear to have elected to control the power from the BIOS option setting
whether the machine automatically wakes up when power is restored, rather
than the option controlling any USB 'wake-up'....

Best Wishes

 

[jroc]

All I know is...that I have a USB Wireless Optical Mouse..and when I power down
the "transmitter" powers off....but the Mouse goes into 'standby'..faint red
glow.....Only thing that might be the solution....is check in the "Device"
manager under Universal Serial Bus Controllers...and 'double click' each root
hub and then go to 'power management and check the box 'allow the computer to
turn off this device to save power'....also when you double click the USB Root
Hub to view the properties...under the 'Power' tab will list any devices on that
hub....for instance under one of my root hubs "power tab" is listed "Microsoft
USB Wireless Mouse (IntelliPoint) and HP Scanjet 8200.
"De Oppresso Liber"
From Oppression Liberate

jroc® 7th Special Forces Ft.Bragg N.C 18/Bravo
****only thing easy in life is failure****
*******so get tough*******

 

[milleron]

Somewhere yes.
However, available power doesn't have to be 'drawn'. A USB port, is
allowed to draw 100mA max, then the OS is allowed to 'authorise' up to
500mA to be drawn by a device. Things like USB 2.5" HD's need all of this,
while things like mice only draw a few mA. Most systems don't implement
the originally envisaged 'switching', to actually change the power
available, instead just having a relatively simple self resetting fuse on
the USB power line.
The power supply on your computer is probably able to deliver well over
300W, and if it was delivering this, it'd all end up as heat somewhere
(most in the HD's, video card, processor etc.), but typically most
computers 'only' draw about 120W, in 'normal' operation.
Now the poster was pointing out that if all USB ports remain powered off
the standby line, and all were in use, with devices potentially able to
draw the maximum current, the supply would need to be able to deliver 5A
just to feed these devices.
Leaving power on some ports, is 'normal', snce it is required if you have
a USB keyboard/mouse, and want to implement 'keyboard' wake-up from
suspend. Similarly, modem wake-up, if using a USB modem, requires this.
The normal 'practice', is to have just two of the ports connected to the
+5SB line, and the rest from the 'main' supply line. Some motherboards go
a little further, and allow you to 'jumper' this option, while others have
it software enabled, if these wake-up options are selected in the BIOS.
For some 'unfathomable' reason, On the particular boards concerned, Asus
appear to have elected to control the power from the BIOS option setting
whether the machine automatically wakes up when power is restored, rather
than the option controlling any USB 'wake-up'....

Best Wishes

Thanks. I couldn't imagine that a computer in Standby would be
"drawing" anywhere near 5 amps on the USB ports since there's
essentially nothing being powered in that state.

Ron

 

[Paul]

I have no background in electronics, so these things aren't intuitive
for me. Please forgive me if this question is stupid, but if we're
saying that each of 10 USB port "draws one half amp," aren't we saying
that there's current flowing? Where is all that current going? Would
5 amps at 5 volts, generate 25 watts worth of heat?
Ron

As another poster pointed out, I was saying what would
happen in a pathological test case. A USB port can support up to
a 500 milliamp load. Drawing more current than that, causes the
Polyfuse in the circuit to open, shutting off bus power. By
default from the factory, normally the USBPWxx jumper blocks are
set so that the USB headers and connector stack get their power
from +5V. Since your power supply has 20 amps or more available
on that output rail, if the pathological test case arose, the
power supply could handle it.

If a user wanted a "Wake on USB" keyboard and mouse scenario,
they would change only the USBPWxx jumper block for the jacks
used for the keyboard and mouse. Usually the PS/2 connectors have
a similar option, if you wanted "Wake on PS/2" keyboard and mouse.
The rest of the jacks would remain powered from +5V in that case,
meaning there is little chance of exceeding the power supply's
limited amount of +5VSB.

In terms of power consumed when the computer sleeps, your PSU has
a limited output on +5VSB. The label on the side might list a
number like 2 amps or so. Only if you have a lot of devices that
remain powered when the computer sleeps, would you get close to
the limit. Since some power supplies are only 50% efficient in
the sleeping state, you could see up to 20 watts load at the
wall socket. Note that it is hard to measure this power accurately,
so if you want to do such a measurement, I recommend using a
"Kill-a-watt" type measuring device, combined with a PSU that
uses "Active PFC", as the waveform on an active PFC (power factor
corrected) power supply is close to sinusoidal, and makes getting
an accurate measurement much more likely. I've noticed my $400 meter
doesn't like the waveform from my non-PFC PSU, and gives ridiculous
readings on the AC side. Non-sinusoidal current waveforms tend to
exceed the bandwidth of the analog path in the metering device
(a typical good meter might only be capable of responding out to
50KHz or so - many meters will be worse than that).

Has anyone verified when the USB power is shut off ? Is there
a BIOS setting that works or not ? I can, for example, see
three Polyfuses next to the standby LED, and the proximity of
those parts suggests to me, that +5VSB is connected direct to
the Polyfuse. Normally, the powering path would look like this
on an Asus board:
USBPW12 "Typical Asus board"
(header)
+5VSB (always powered) ---X USB_jack_1
X---Polyfuse-+---+--X 5V
+5V (only when running) --X | | X D+
(filter --- | X D-
cap) --- | X GND
| |
GND | USB_jack_2
+--X 5V
X D+
X D-
X GND

I'm suspecting the A8N-SLI looks more like this, and it would
be nice to have someone confirm or deny that it works like this:

A8N-SLI Family hypothetical model (assumes no BIOS option)

USB_jack_1
+5VSB (always powered)---Polyfuse-+---+--X 5V
| | X D+
(filter --- | X D-
cap) --- | X GND
| |
GND | USB_jack_2
+--X 5V
X D+
X D-
X GND


A8N-SLI Family hypothetical model (assumes a working BIOS option).
(Here, either transistor #1 or #2 is turned on by BIOS code. I
don't see any chips or discrete transistors on the board, located
to do something like this. This would not be a good function to
integrate into the Southbridge either.)

+5VSB (always powered) ---+
|
Series-pass transistor #1
|
| USB_jack_1
X---Polyfuse-+---+--X 5V
| | | X D+
| (filter --- | X D-
Series-pass transistor #2 cap) --- | X GND
| | |
+5V (only when running) --+ GND | USB_jack_2
+--X 5V
X D+
X D-
X GND

In this Intel reference schematic, on PDF page 84, they use a small
8 pin device SI4501 to switch between +5V and +5VSB for a USB port.
Perhaps an Intel BIOS has an option to select one or the other...

ftp://download.intel.com/design/chipsets/schematics/25281202.pdf (9MB!)

Example of a small device suitable for switching USB power sources.
This is likely too expensive for Asus's tastes.

http://www.vishay.com/doc?70934 (SI4501)

Paul