Why does display only refresh when mouse moves?

Posted on 2008-11-04
Last Modified: 2013-11-23
I am running a program written in Delphi 6 that takes in real time data through a USB/serial connection.
The program runs OK on other XP machines, but on the EEE PC 1000H the plots (chart components) and data displays (memo components) only refresh when the mouse or pad is moved.
This is true for compiled code as well as development code
I have tried to force refresh in the code, but that does not work and, in any event, the fact that the code runs OK on other machines suggests a hardware glitch.
In the past I would have suspected IRQ conflicts - for info, the elantech smartpad is IRQ 12, the USB ports are 16, 18, 19 & 23 -  I have tried disabling the smartpad, but the problem still exists.
Any help appreciated.

Question by:ColMacF
    LVL 16

    Expert Comment

    What other USB devices do you have on the hub?  I'm thinking there is a defective device plugged in.  Try removing everything except for the one required for your application and see if that resolves it.  If it does, plug in the other devices one at a time to determine which one is at fault.


    Author Comment


    Thanks for the quick reponse.  I've tried that and cycled round all the usb ports with the usb/serial unit as well.  I have not tried disabling the wireless but will do so when my son stops viewing a movie on the laptop!!  The wireless shares an IRQ (19) with one USB, but that shouldn't cause a problem on other USB ports?
    LVL 16

    Accepted Solution

    It could.  As you had initially though, I was thinking an IRQ problem.  But I've seen really odd stuff with USB devices messing things up.  Had one computer that wouldn't boot with a USB printer plugged in.


    Author Comment

    I'll try disabling the wireless later tonight then post any changes
    LVL 31

    Assisted Solution

    Sounds like it could be related to graphics drivers. Are there updates available?

    Author Comment

    I accessed the ASUS support page last week and there were no new drivers or updates.  Following your advice 'Rid' I looked again and there's a page of them.  I'll install all the system updates and also test with the wireless disabled.  There is a VGA update that I'll try first.  

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    IT, Stop Being Called Into Every Meeting

    Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

    Jaspersoft Studio is a plugin for Eclipse that lets you create reports from a datasource.  In this article, we'll go over creating a report from a default template and setting up a datasource that connects to your database.
    Lithium-ion batteries area cornerstone of today's portable electronic devices, and even though they are relied upon heavily, their chemistry and origin are not of common knowledge. This article is about a device on which every smartphone, laptop, an…
    THe viewer will learn how to use NetBeans IDE 8.0 for Windows to perform CRUD operations on a MySql database.
    The viewer will learn how to use and create new code templates in NetBeans IDE 8.0 for Windows.

    779 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    12 Experts available now in Live!

    Get 1:1 Help Now