XPS M1530 DPC Latency problem

I downloaded and used the DPC Latency Checker after finding out that my music playback on my laptop is skipping once in a while. I'm not sure how well to use the program, but this is what get once like every 2-4 minutes:



Any ideas how to fix this?

 

Read the instructions in the box? Enable/Disable things in the Device Manager control panel, and/or try to do the same with your services (Start -> Run - > type "services.msc").

FWIW, I don't ever get more than 200us on my Inspiron 2600 when it's properly tweaked down for audio work.

 

Killing unnecessary services and background apps is the first thing that you should try and do.

 

I found last year that it was the AHCI drivers. I reinstalled using standard sata operation rather than using AHCI and no more spikes

 

I found one of the hardware that is causing this; it's the fingerprint reader driver. After disabling that driver, I'm getting to the yellow peaks now at around 1700-2000 uS. I'm still getting the red peaks but they are only once every twenty minutes and they are around 2000-3000 uS range.

Any "howTo" on this?

 

Yes,another area where XP truly shines over Vista
If you ever are able to get that kind of latency on a Vista OS install,please share your secret(s) with me.

 

No no no not true. Many people were having the same problems cross operating systems.

Do not make those assumptions!

 

yes,i am certain depending on the config drivers/hardware some others also have latency issues using XP OS.
But maybe you Nizzy should do a little research on the matter before you chastise someone who has.
Take 2 Identical machines,only difference being the OS,and most likely XP based machine WILL have the lower latency.Here is more info on the subject

http://www.soundonsound.com/forum/showflat.php?Board=PCMus&Number=588140

If you don't want to scroll through hundreds of posts like I did,read the one below...his spelling skills need improvement but you will get the drift,


Hi!! Im new to this forum. I've got obsessed about the HIGH DPC latencies. Here I have something interesting that I wrote in another forum (before I found this post):
From http://forum.notebookreview.com/showthread.php?t=213664 :

hi guys!!! Today I bring something that has been discussed in MANY FORUMS,
and no one seems to have an answer. I tried EVERYTHING and read as much as I
could before posting here!!!! This is the situation:


I bought a new HPdv9500t laptop, with vista home 32. using DPC Latency
Checker ( http://www.thesycon.de/deu/latency_check.shtml).
It swhows spikes all the time. As it recommends, i tried disabling and
enabling devices in device manager. I tried everything. Ever restarting after
each change, just in case the drivers is still there. I even tried to disable
all services that I could. Microsoft says that a good driver should not spend
more that 100 us in an interruption. I get red spikes of 3000 us and more
sometimes! I can't find any solution... I tried to run RATTV3 ( http://www.microsoft.com/whdc/DevTools/tools/RATT.mspx)
to see what driver is the culprit. DCP doesnt show that, just the dpc times.


But RATT doesnt work on vista....


The funny thing just begins......


I decided to intall Windows XP (I have both now.
thanks Hackez and Mujjman). . The latency in DPC
checker is EXTEMELY LOW!!!! the highes peak is around 50us, even
with all hardware on!!!!


So...what can we think about this??? A looot of musicinas and 'real time'
users complain, because their harware doesnt respond in vista. This is patetic!!!
I know...I know...you will say..."Disable your Wlan, balbla". This is
true...the WLAN makes a lot of spikes, but even with it off, i get a lot of
them. The only time I got decent DPC in Vista was when I disabled EVERYTHING
at the device manager (usbs, mem card read, fingerprint, nvidia, sound,
FIREWIRE). but after enabling harware the problem comes back WITHOUT ANY
LOGIC!!!! imposible to identify Any problematic hardware.

 

You made it seem to me like you meant that it was vista's fault which is not the case as xp has the same problems when using the same hardware configurations. I DID ask on these forums and got those responses. But what would you know, you apparently assume I know absolutely nothing about this issue.

And just so you know, I first learned about this problem when I had a problem 3 years ago with a WINDOWS XP desktop that turned out to be a PCI bandwidth and IRQ sharing conflict that XP would not report. I would give more details but again, I don't know anything about this issue, so I will keep it to myself.

So go on, mr. know it all, fix the OP's problem.

 

Well,your interpretation was flawed

and,yes you don't

 

1 quote me correct, 2nd if you were a bit nicer maybe you could get at least 1 person to friend you on myspace. Or maybe its just that nobody likes your music. That is probably it. But whatever, i do not need to argue with a 45 year old on a public forum.

Back to the topic. To do the AHCI, you would need to enter the bios and change the mode of operation from there. I really wish i could have some try this to prove it works. I've done 3 reinstalls on my laptop with it off and used it for about 5 months and never had my audio skip again. Where as i reinstalled 3 times with it on and it skipped every time.

This is the best advice i can give as it is what worked for me.

 

"if I were nicer"
what does my music or a outdated myspace page have to do with the topic?
People who are kind don't make remarks you just did,now its a personal attack eh?
The people that buy my CD's seem to like it just fine... and thats all that really matters.

 

Like I said. You called me out first saying I don't know anything about this topic. You should at least ATTEMPT to help the OP solve the problem. All you did was copy another forum post that says they have no idea whats causing it. That doesn't help much now does it?

Just remember, you brought the ridicule out first by telling me I don't know anything about the problem after I was offering help. But lets try and keep this on topic if you're capable of that, ok?

 

Are your reading skills waining also, the poster installed Xp on the same machine that came with Vista Preinstall and viola,problem solved.
And by the way, your post " no no no not true ,do not make those assumptions" is what got me started.
You are a true egomanical,always has to have the last word,or in this case post.

 

Do I have to have the last word in NO. Will I NO. I'm sorry op but I tried to help, but apparently this guy has a superiority complex he needs to work on. I am going to refrain from posting on this thread anymore. You can PM me away from ProfessorShred if you would like some more help from me.

I am also going to rethink coming to this site anymore. NBR can thank this guy for that.

 

Turning off the wireless solved my problem. Wired? No problem...