Q: I went to Device Manager and opened for Universal Serial Bus Controllers category and tried to “this device to bring the computer out of standby”, but the box was gray. Also I could not tell what, if any, of these USB devices for my wireless mouse and keyboard.
Any ideas what I should do?
Best Answer: I have came out of standby and I never got kicked off.
Re:guy I appreciate all the time you spent assisting me with this…you are a true asset to anandtech forums.
Yeah, my mobo is 2 1/2 years old…I guess that is ancient in the world of PCs. I wonder if the majority of new mobos come with USB wakeup.
Thanks again.
Re:I downloaded the manual. It appears that the board is just so old that USB wakeup had not been implemented. The board probably goes into complete sleep mode, since it doesn't seem to have any control over what level of standby it goes into, so the USB ports by default aren't being powered in sleep.
Re:guy, I have an ASUS K7V motherboard.
I haven't come across motherboard doucmentation or bios setting that refers to +5VSB.
But I know that my power supply supports it becasue I am able to (finally) get my PC to wake from standby mode via laptop on the LAN.
Re:What motherboard do you have? Whether USB can wake it up is a function of the board, not the USB devices. When the system goes into the "low power" mode, it continues to power the USB ports (S1 mode) and so USB devices can wake it up. If it goes into S3 deep sleep, it normally stops supplying power to the USB ports, so the USB device can no longer send any signals telling it to wake up. The +5VSB settings tell the motherboard to continue powering the USB ports so that USB devices can wake it up.
You may be able to specify in the "Power Management" section of your board what level of power saving mode to go into, if the board doesn't support USB wakeup from deep sleep.
A USB to PS/2 adapter will turn your keyboard or mouse into a PS/2 device as far as the system is concerned, so if the system can wake up from PS/2 devices, that will make the device wake up the computer, but you of course lose whatever benefits you saw in using USB in the first place.
I've never needed to use Wake On Lan, either. I never let my computers go into any sleep or hibernation modes.
Re:Does anyone know if a USB to PS/2 cable would allow me to wake my PC from STANDBY?–since the USB device connected to the USB port won't wake the system.
Re:Lord~ the only bios settings that were related to USB:
PCI Configuration >> USB Function >> Enabled
USB Legacy Support >> Enabled
I couldn't find anything in the mobo manual regarding jumpers/dip switches to enable waking the computer with USB ports.
Do you think the problem could be that the USB keyboard/mouse that I have (Gyration) doesn't have the capability to take the PC out of STANDBY?
By the way, does wake on lan work with your mobo (or don't you use it)?
I think I am going to have to get another mobo that truly support Wake On Lan and that can wake a PC from a USB device.
I have an ASUS K7V mobo.
Thanks.
Re:You may need to enable the feature on your motherboard. It may be a BIOS setting or a dip switch or jumper on the board. On the A7N8X, it's sets of jumpers (one for each pair of USB ports) which define either +5V or +5VSB. The first allows USB to wake the computer up from S1 sleep mode, which is low power. The second allows wakeup from S3 mode, which is deep sleep, and makes the system send a trickle of power to the USB ports (which it doesn't normally do in S3 mode) in order to monitor for movements or keystrokes to wakeup the system.
Read your manual for instructions. If it doesn't mention it in the jumper settings or BIOS settings, then your board may not support it. You'll also need specific requirements with the PSU.
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