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Thread: XP won't hiberate - touchscreen USB to UART problem

  1. #1
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    Feb 2008
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    XP won't hiberate - touchscreen USB to UART problem

    Hi everyone,

    This is my first post. A little introduction, I am from Australia and I have been trying to design, setup and install a carputer into my car for the past 18 months. I have run into so many problems and been through several motherboards to find the right one that works best.

    I am now close to giving up because of a problem I cannot get beyond with each setup. I purchased my carputer screen (a Chinese-made 8" touchscreen) and the M2-ATX smart PSU from the US.

    The screen has no branding whatsoever. All I know is that uses Elo (ELO) drivers for the touch interface and the Silicon Labs CP210x USB to UART Bridge drivers for the serial to USB interface. It was advertised and sold to me as a "USB touchscreen" but that's not fully true. The seller has been unhelpful.

    One common problem with every motherboard I've tried (now using a VIA EPIA-V) is that the CP210x device will not allow Windows XP to enter standby or hibernation. This is an essential requirement for me.

    I've been in touch with SiLabs and their developer says that it is due to the motherboard, but their own knowledgebase website says the driver does that purposely to avoid blue screen errors.

    I've been using v4.20 of the driver and have downloaded 5.x and will try that later in the day or tomorrow.

    But I was wondering if anyone knows of an alternative driver or some kind of Windows service or application utility that can detect a request to go into standby or hibernation and shut down the device driver so the OS can go into that mode?

    Or maybe someone knows how to tinker with the XP settings to allow it?

    I've "wasted" so much time and money on this hobby and installed XP so many times because of the different motherboards and such.

    Any help would be greatly appreciated.

    Thanks,

    Andrew.

  2. #2
    Variable Bitrate BREWDOG52's Avatar
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    Aug 2007
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    Oregon
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    1. Go to Control Panel->System->Hardware->Device Manager
    2. Click on Mice and other pointing devices->USB Touchscreen Controller
    3. Click on the Power Management Tab
    4. UNCHECK "Allow this device to bring the computer out of standby"
    5. Click on OK

  3. #3
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    Join Date
    Feb 2008
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    Thanks, Brewdog. I didn't have a Power Management tab. I solved the problem by using the latest Silicon Labs drivers. Now I have to work out how to get it working after coming back from hibernation (standby works fine).

    I'm going to try the devcon / Hibernate Trigger method.

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