THinkpad 10 tablet keeps providing usb power??


  1. pootler
    Posts : 7
    win 10
       New #1

    THinkpad 10 tablet keeps providing usb power??


    Windows 1903


    Hello again,



    I am attempting to use my thinkpad 10 tablet ( Windows) as a car front end.



    I am getting there ( ), but am still stuck by some problems.



    One of these is power management.



    I have various peripherals connected via a separately powered usb hub.



    so........ I don't need any power to the hub from the tablet.



    If I am not going to be away from the car for long, rather than shutting down the tab, I sleep it .



    Althougth power to the tab and the powered hub is removed, the tablet still gives power to the hub from its battery reserve.



    The hub has seven peripherals attached, so it can represent quite a drain to the tablet on battery.



    I have tried to prevent usb ( selective suspend), and also tried to check for windows powering down any usb devices to save power in Device Manager.



    Still, every time the car removes power, the usb port on the tablet is still active??



    Has anybody any ideas?



    -- by the way, I have no option in BIOS for usb power, and I also tried to make a USB cable DATA only- no luck ------



    Many Thanks



    Pootler
      My Computer
    Quote Quote

  3. EdTittel
    Posts : 4,224
    Windows 10
       New #2

    Some USB ports are configured to deliver juice until the battery goes dead. They usually have yellow plastic inserts, and are known as "Always On USB" ports (here's an informative SuperUser discussion of this topic: How does "Always On USB" work?). It might be that this port is set up for or stuck in this status. Usually requires a BIOS change to alter such behavior.
    HTH,
    --Ed--
      My Computers
    Quote Quote

  4. pootler
    Posts : 7
    win 10
    Thread Starter
       New #3

    Thanks Ed,

    I don't think it is dedicated- doesn't mention it in any manual, and it is not coloured yellow.

    The tablet BIOS is restricted and doesn't contain any USB power settings.

    I guess I could be pragmatic, and measure how much battery drain I get from being out of the car for, say, two hours ( MAX), and if it is less than say 30%, just live with it

    Unfortunately, hibernation doesn't work with my set up, which would have been an answer.

    Thanks again

    Pootler
      My Computer
    Quote Quote

 

  Related Discussions
I searched your forum from Google. Because the forced update of Windows 10 is annoying. Every after a few months Mandatory update. No other website can find an effective solution. Finally found an effective method in your forum. Thank you...
Hey there, just reinstalled Windows 10 on my tablet and i think before it did lock the session when i pressed power.. Now it doesn't, at all. Couldn't find working tweak/setting for this. Where is it? Must be somewhere!
Ordered an old Ebay refurbished Lenovo ThinkPad X200 Tablet to replace my too slow Dell ST2. It has 4GB ram and has been upgraded to Windows 10 Pro. I intend to clone the HDD to SSD. Can anyone here advise on any issues and recommended...
Hi, I upgraded to Windows 10 a few days ago, and have been experiencing frequent BSOD over time for different reasons. Attached is the log of the last one I just encountered today (there are also dumps from some of the earlier BSODs). It occurs...
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

 © Designer Media Ltd
All times are GMT -5. The time now is 22:46.
Find Us




Windows 10 Forums