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IDProjectCategoryView StatusLast Update
0000315SpeedFanOtherpublic2005-09-17 16:59
Reportergarbledwords Assigned Toalfredo  
PrioritynormalSeveritymajorReproducibilityalways
Status acknowledgedResolutionopen 
Product Version4.24 
Summary0000315: DCP CPU utilization
DescriptionI am having a strange behavior with SpeedFan lately. I have been using SpeedFan for some time with no problem, but recently when I run it, the Deferred Procedure Call (call) processes CPU utilization starts to increase until the PC locks up. When I start SpeedFan, the DPC CPU utilization starts to increase, but not immediately (minutes later). It continues to increase slowly until the PC locks up. If I exit SpeedFan, then the DPC CPU utilization decreases slowly back to normal (very low).

What information should I provide to help trouble this issue.

Thanks
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Motherboard Model
Video Card Model

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alfredo

2005-07-19 17:31

manager   ~0001043

I have to admit that I never heard about DPC. If you could shed some light, I will be happy to find a solution.

garbledwords

2005-07-19 17:32

reporter   ~0001044

Figures, after I open the problem, I find a possible solution. I have a Nvidia graphics card and I will try running SpeedFan with the /NONVIDIAI2C switch. I will update if this resolves the issue.

Roy

garbledwords

2005-07-19 20:43

reporter   ~0001061

This looks like a good resource for learning sonething about DPCs.
http://citrin.ru/docs/Win2k/Win2k%20Performance%20Guide.pdf

garbledwords

2005-07-20 15:23

reporter   ~0001066

Using the /NONVIDIAI2C switch did not help. It also might be breaking my Raid 1 and getting the disks out of sync. I dno't know if this is a symptom, cause (due to a bad disk), or totally unrelated (due to a bad disk).

alfredo

2005-07-20 18:04

manager   ~0001067

I read (part of) that (huge indeed) book. DPC is related to interrupts and SpeedFan makes no use of interrupts. In order to try to track down this issue, run SpeedFan with the following command line parameters:

/NOSMARTSCAN /NONVIDIAI2C /NOWMISCAN /NOSMBSCAN

This way, only sensors available on the ISA bus will be detected and used. If you no longer see the DPC issue, remove /NOSMBSCAN and go on until you find something interesting.

garbledwords

2005-08-07 03:35

reporter   ~0001093

Hey, its been awhile and just wanted to give you an update. Still have the problem, even after a complete rebuild of the PC. (Due to the hard drive problem.)

I'm running SpeedFan with the following command line parameters:

/NOSMARTSCAN /NONVIDIAI2C /NOWMISCAN /NOSMBSCAN

and it is working fine. I haven't had a lot of time to to figure out which one of the parameters does the trick, but I will let you know when when I have gotten it figured out.

Thanks

Roy

garbledwords

2005-09-17 16:59

reporter   ~0001204

HI,

You can go and close this issue. It turns out that my video card was going bad. After struggling for a couple of months, I got down to the point where I was forced to try replacing components. I was just lucky enough to have a spare video card. I put it in and my CPU utilization problem went away. It would been a lot less frustating if it have been a hard failure instead one of those things that really don't indicate what is going on.

Oh well.

Issue History

Date Modified Username Field Change
2005-07-19 17:21 garbledwords New Issue
2005-07-19 17:31 alfredo Note Added: 0001043
2005-07-19 17:31 alfredo Status assigned => acknowledged
2005-07-19 17:32 garbledwords Note Added: 0001044
2005-07-19 20:43 garbledwords Note Added: 0001061
2005-07-20 15:23 garbledwords Note Added: 0001066
2005-07-20 18:04 alfredo Note Added: 0001067
2005-08-07 03:35 garbledwords Note Added: 0001093
2005-09-17 16:59 garbledwords Note Added: 0001204