Resolved Keeping USB ports Powered on while iMac is in sleep mode???

[parisi2274]

Hi All....

Hoping to get some help with an issue I am running into. My company attends various trade shows throughout the year and they like to show off our software running an iMac (late 2015 model, Retina 5k, 27"), and the issue I am having is that the barcode scanner that we connect to the iMac stops working if the computer goes into sleep mode (I assume the USB ports are shutting down as well, causing the issue). The only way to get the scanner to work again is if I bring it out of sleep, and then plug it into a different USB port on the back.

What I am trying to determine is if there is a way to control power management on the USB Ports like you can do on a PC through Device Manager? One of my co-workers suggested connecting the device to a powered USB hub, but I was looking to avoid having to add unnecessary peripherals.

Does anyone have any insight into how to keep the USB ports from going to sleep when the computer goes to sleep? (side note: The current energy savings are set so that none of the hard drives go to sleep ,and that just the monitor shuts off after like 10min).

Any help would be greatly appreciated.

Thanks

 

[elf69]

I personally do not know the answer but could you set it to never sleep and only turn monitor off?

my 2007 iMac is set this way at home.

 

[bplein]

Hi All....

Hoping to get some help with an issue I am running into. My company attends various trade shows throughout the year and they like to show off our software running an iMac (late 2015 model, Retina 5k, 27"), and the issue I am having is that the barcode scanner that we connect to the iMac stops working if the computer goes into sleep mode (I assume the USB ports are shutting down as well, causing the issue). The only way to get the scanner to work again is if I bring it out of sleep, and then plug it into a different USB port on the back.

What I am trying to determine is if there is a way to control power management on the USB Ports like you can do on a PC through Device Manager? One of my co-workers suggested connecting the device to a powered USB hub, but I was looking to avoid having to add unnecessary peripherals.

Does anyone have any insight into how to keep the USB ports from going to sleep when the computer goes to sleep? (side note: The current energy savings are set so that none of the hard drives go to sleep ,and that just the monitor shuts off after like 10min).

Any help would be greatly appreciated.

Thanks

Have you tried a ~powered~ USB hub?

If a powered USB hub doesn't fix it, my guess is that ti's not the power to USB that is making the device wonky, but rather the loss of signal.

 

[parisi2274]

I personally do not know the answer but could you set it to never sleep and only turn monitor off?

my 2007 iMac is set this way at home.

I have it set to never sleep, and to just turn off the monitor and it still an issue when waking the computer.
[doublepost=1513791436][/doublepost]

Have you tried a ~powered~ USB hub?

If a powered USB hub doesn't fix it, my guess is that ti's not the power to USB that is making the device wonky, but rather the loss of signal.

I just attached one, and let the computer monitor turn off and then waited about 15min, I then woke the computer, logged in and tested the scanner and it was working... so it seems that it DOES need a powered USB hub.

Thanks for the assist!