8 Comments

Summary:

One weird problem I have experienced with the Fujitsu P1620 and a couple of other UMPCs is that occasionally the touch screen would go dead.  It never happened often but when it did the only way to get the touch screen to come back on was […]

One weird problem I have experienced with the Fujitsu P1620 and a couple of other UMPCs is that occasionally the touch screen would go dead.  It never happened often but when it did the only way to get the touch screen to come back on was a reboot of the system.  I have seen this on both Windows XP and Vista and it happened twice on the P1620 when I started to troubleshoot it in earnest.  What I discovered was a simple fix that might help anyone else who has suffered from the touch screen malady.

One of the differences in hardware on the P1620 over the predecessor the P1610 was the change to a USB-based touch screen controller.  I got to thinking about this change when I had the second failure of the touch screen to wake up and realized that it always happened upon a resume from sleep.  I know that Windows defaults to allow the OS to shut USB components down as part of the power saving features so I checked in the Device Manager to see if that was the case.

Touch_fix_1

Sure enough if you look under HID (Human Interface Devices) and open the FCL USB Pen Tablet component you find that under the Power Management tab the touch screen is set to allow power management to shut this device down.  Now I can’t think of a single circumstance when you would ever want the touch screen controller to be shut down so just deselect that option on that tab and you should be home free:

Touch_fix_2

So far my touch screen has not turned itself off and since the fix is so easy it’s worth doing even if yours hasn’t turned itself off yet.  It might save you some trouble down the road.

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  1. I think this will probably be one of your most popular posts. You should find a way to make it stand out instead of subjecting people to searching for it once it scrolls off the front page. You’ve probably saved people a lot of grief and Microsoft should send you some kind of fee.

  2. To be clear, because this is a USB issue, this does not work for the l610, right? I don’t see a power management tab on the properties of my HID Tablet page.

    Steve

  3. James Kendrick Wednesday, March 12, 2008

    YEs Steve, it has to be a device that power management can control like USB. Touch screens should not allow this to happen by default, shame on MS.

  4. Wonderful… I had been asking about this on the LeoG.Net boards that I know you frequent… I’m going to add it to my Performance Tips list on that board if you don’t mind… thx

  5. Matthew Miller Wednesday, March 12, 2008

    I saw this fix on Rodfather’s blog a month or so ago and it actually makes the U810 touch screen 100% better and more functional. It is amazing what this simple check box can do for making the touch screen on this small UMPC much more functional. I am working on a review/thoughts of my Fujitsu U810 and was going to put this exact same fix in that as well.

  6. Yes this doesn’t work for the 1610, although I can say that I’ve never had my screen not turn on like that.

    On the 1610 under HID there is “FCL Serial Pen Tablet”, with no power settings in it.

  7. Ross MacGregor Wednesday, March 12, 2008

    I wonder if it does actually save power. If so, it could be a feature for some.

  8. This seems to work with the HP2500x tablet PC too. Looks like there’s heaps of people, and HP, who’d like to know about this!! thanks.

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