How to sleep USB ports?

[schmalgausen]

Hello all,

MBP 2019, latest updates. I have connected USB DAC and 0% battery in the morning. Any ideas?

 

[fisherking]

you could get a usb hub with on-off switches per port. or just unplug the DAC, and confirm that that is what's draining the battery first....

 

[schmalgausen]

I lived some time without that DAC and sleep mode was ok. Last night I connected it and found its light on during "sleep". Then I changed sleep mode to hibernation (25) and got zero battery.

I made some measurements and discovered that DAC's consumption is about 1 watt. I don't think it can eat all battery. It seems like USB activity doesn't allow to sleep.

 

[schmalgausen]

,...........

 

[DeltaMac]

Is your battery in good health?
Check in your Activity Monitor, then the Energy tab, where you can view what processes are using energy.

 

[schmalgausen]

Well, I restored sleep setting yesterday I got more normal 8% usage during night. It means some process doesn't allow to hibernate on 25 setting.

 

[Fishrrman]

A Fishrrman "dumb question™":

Is there any problem with simply shutting down the MBP at night, and then rebooting in the morning?

 

[schmalgausen]

The 00s are gone. People just want to close and open their lids.

Another surprise is the DAC (2 watts consumption btw) being connected to the left USB makes all system hot and less hot to the right USB. This is MAC, ladies and gentlmen!

 

[DeltaMac]

What is the condition of your battery?
Go to your System Information, then the Power tab.
You also may want to consider connecting your power adapter when using the DAC--particularly when your battery may be starting to show its age.

 

[schmalgausen]

Battery is okay, about 100 cycles, it can power my MBP about 6 hours of office work.

 

[HobeSoundDarryl]

The 00s are gone. People just want to close and open their lids.

Another surprise is the DAC (2 watts consumption btw) being connected to the left USB makes all system hot and less hot to the right USB. This is MAC, ladies and gentlmen!

Apple or Apple Fans will spin that as a feature. If you are in a cold setting, plug in on the left. If in a hot setting, plug in on the right. Only Apple genius can anticipate environmental scenarios and engineer such an elegant solution.