Solved

IRQ Dilemma

Posted on 2000-03-06
8
250 Views
Last Modified: 2010-04-26
I just had to configure a brand new Compaq Presario with a videocard and soundcard onboard. The models came with a pci modem. everyting worked fine

I went ahead and installed a NIC card. and it began something strange. I had IRQ problems, the Modem wanted the Nic'a IRQ. SO finally i removed the modem and the Nic placed itself somewhere and then i put back the modem and found an otherplace... everything was ok...

but as it seems, i just discovered something!

The Nic uses the same IRQ as the Videocard (IRQ3) but does not seem to use the same adressing block. and noting freezes and no conflict!

Could this cause problem...

I just discovered that the monitor's image wabbles sometimes. I am trying to rule that out, but could it be that the NIC having to cope with a lot of network traffic, affects the video dsiplay...

Im am trying to rule that out by using a second monitor to compare, but i  would like to know if it is remotly possible...

Awaiting answers...
0
Comment
Question by:njacques
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
8 Comments
 
LVL 2

Expert Comment

by:sandman97289
ID: 2590672
njacques, Windows (assuming you are using windows) does what is called IRQ sharing. What this does is allows various hardware devices to use the same IRQ addresses, windows manages (most of the time) to control these devices even though they share the same IRQ. Sometimes conflicts can arise though. For example I had a video capture card which wouldn't work because of IRQ conflicts with my sound card. So all in all to have two devices sharing the same IRQ is normally ok.

Now I doubt that the wobbling in your monitor is because of IRQ conflicts. Usually devices just refuse to work if there is a conflict. Have you checked the area around your monitor to check that there aren't any regulaters or transformers near by. Sometimes even keeping your computer case too near your monitor can cause wobbling. What happens is that devices which use inductors creat large amounts of magnet field. This magnetic field causes disturbances in your monitor, that is why you see it wobbling....

Hope this helped

Sandman
0
 

Author Comment

by:njacques
ID: 2590936
I will try to check that by using another monitor for 1-2 hours to see if it is the unit, or the environment...

Ill get back to you!
0
 

Author Comment

by:njacques
ID: 2590938
Ho! i forgot, the system is indeed using Widow95
0
Ransomware-A Revenue Bonanza for Service Providers

Ransomware – malware that gets on your customers’ computers, encrypts their data, and extorts a hefty ransom for the decryption keys – is a surging new threat.  The purpose of this eBook is to educate the reader about ransomware attacks.

 

Expert Comment

by:sime788
ID: 2591334
Just a thought. You say the screen is wobbling... putting 2 monitors close together often creates wobbling effects as they interfere with each other.

Sharing of IRQ's is common on PC systems as there are so few available and should work fine.

No a busy NIC will NOT affect the video card.

Hope this helps

0
 

Expert Comment

by:kooltek
ID: 2591961
try this...

go into device manager and remove the sound, modem and NIC. then reboot windows and see if it works.

cheers
0
 

Accepted Solution

by:
cycraymond earned 50 total points
ID: 2593856
For your information,  Compaq Presario system required special driver.  I suggest that you use the driver from compaq.. . If I am not wrong, your modem is an internal modem come together with the system....

check it out:
    1. Is the device from compaq company
    2. Did you reinstall the system?
    3. What OS is it using....

You can goto the www.compaq.com site to check out the solution.... If the first 2 question above ANSWER is YES then I think you need a bios update from compaq for your machine... that you can download from the site mention above.

Good Luck for trying

0
 

Expert Comment

by:sunsetyang
ID: 2593988
 Some NIC will only work in its pre-defined work mode.That is to say:You can choose the right resource it has
been set.Or modify its work mode by
using the tools provided with it.To
modify the IRQ to the right one.Then
it will work.
  In Windows 95,some cards won't work if
it is sharing IRQ with others.
0
 
LVL 2

Expert Comment

by:sandman97289
ID: 2594616
cycraymond please follow the protocol of this board and post comments instead of answers, this way the question can get the maximum exposure and other experts can also express their opinions. What you have stated above is not an answer it is a suggestion or opinion. I hope you will follow the protocol in the future...

Sandman
0

Featured Post

Ransomware: The New Cyber Threat & How to Stop It

This infographic explains ransomware, type of malware that blocks access to your files or your systems and holds them hostage until a ransom is paid. It also examines the different types of ransomware and explains what you can do to thwart this sinister online threat.  

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Does your iMac really need a hardware upgrade? Will upgrading RAM speed-up your computer? If yes, then how can you proceed? Upgrading RAM in your iMac is not as simple as it may seem. This article will help you in getting and installing right RA…
Great sound, comfort and fit, excellent build quality, versatility, compatibility. These are just some of the many reasons for choosing a headset from Sennheiser.
Attackers love to prey on accounts that have privileges. Reducing privileged accounts and protecting privileged accounts therefore is paramount. Users, groups, and service accounts need to be protected to help protect the entire Active Directory …

752 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