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June 13th, 2009 19:00

Studio 1737 DPC Latency

Hello! My Studio 1737 is showing the DPC Latency problems described as in this thread: http://en.community.dell.com/forums/p/19245700/19411542.aspx

Symptoms include periodic crackle and popping sounds during audio playback. The problem is most severe with wireless broadband enabled and disabling it greatly helps but does not completely solve the problem.

Research on the web shows this is a fairly widespread problem known to affect Studio laptops, and that BIOS upgrades have resolved the problem for other computers including Dell's XPS line.

So I'm hoping this will be fixed soon. Has anyone been able to get information from Dell support about whether this will be fixed with a BIOS update for the 1737?

Cheers,

-Andy

58 Posts

September 23rd, 2009 22:00

I have zipped up drivers that I used to install XP on my 1737, if I post a link here will it be removed?

Also remember you will need to change the Sata mode in the bios to IDE mode.

10 Posts

September 23rd, 2009 23:00

Hey Gang. i told you I got 2 laptops, the 1737 and the 1750.. well i was looking for drivers for the 1750 for XP and i came accross this interesting thread on another place.  Seems there was loud popping annd crackeling on teh 1750, and here is what went down:

On the Inspiron 1750 I just recently put XP on, the random popping noise ended up being the power-saving function that came with the driver software. (The ones automatically downloaded by Windows.) It would make a loud pop at the start of a sound, and then another one ten seconds after the last sound (when the power-saving kicked in). I just turned off this feature and no more random popping noises, and  but still, the sound quality didn't quite sound right with the drivers from Windows Update, sounded a bit distorted. The edited ones seem to be working flawlessly though. And it wasn't just at the start/after sounds that it did it with me, I could literally leave it there doing nothing and it would randomly pop away!

To start with, you'll need to download the XP IDT driver package for the Inspiron 1545 from Dells website to start with and extract these. I'll upload the updated INFs to some webspace tonight once I get home and post back.

Most of the 1545 drivers worked great on the 1750 (except we cant seem to make the 1397 wireless card run under XP no matter what)  so someone rewrote the inf files, and here are the instructions: I'm not sure whether this is essential, but I would recommend removing the device you've already installed and deleting its relevant oem*.inf file to stop it reinstalling on reboot. Reboot the PC so it prompts for the drivers for it, cancel then carry on as below:

  • First you need to download the Inspiron 1545 XP audio package (R215959) from Dells website.
  • Extract this into its default location (c:\dell\drivers\R215959)
  • Download the zip I've attached to this message (Inspiron1750_XP_IDT.zip - 131kb)
  • Extract all the files from this zip over the top of the same files within c:\dell\drivers\R215959\WDM
  • All done! Just run the setup file within the R215959 folder, and it should install and work perfectly.
  • I did this and now my 1750 works GREAT under XP, latency checker is all good now.. so this might be an idea....?

7 Posts

September 25th, 2009 06:00

Bill

I tested my xps m1710 as follows - running all my "normal" start-up items (virus protection, windows defender, and with all devices active (soundcard, wifi, internal battery charger - nothing unusual) I get latency spiking to almost 16000 microseconds (not a typo) every 50 seconds or so, with lots of other spikes well above 1000 mu in between.  Shutting down the wifi card makes a big difference - the huge spikes stop, but the others (up to 4000 mu) continue.  As I shut down various devices, stop virus protection, stop ACPI as suggested in this thread, go into services and shut down a bunch, I can get  the highest spikes down to about 1000 mu (lots of them) with a very occasional spike in the red.  But that's as good as it gets, which isn't good enough to run Sonar or Ivory at average latency settings.  And shutting off all this stuff takes a lot of time.

No matter what I do, I can't use the digital audio software (which isn't particularly exotic) without dropouts (clicks, pops, etc.) and in the case of Ivory, when that happens, the software stops working, and I then have to restart it (which in the case of Ivory, takes a long time).

Bottom line is that if I can't get this fixed soon, I'm going to buy an imac, which is what I should have done instead of plunking down 1500 bucks for this supposed super laptop.  But thanks for helping.

MR

13 Posts

September 26th, 2009 10:00

thats exacally what i have done, i wont mention how for the post will be deleted if i do, but needless to say, i let everyone know of my experience,(very,very,poor one) and recommend any other system. sorry your going through this as well.

2 Posts

September 26th, 2009 10:00

I've got the same problem with my dell studio 1737. I bought it to use it with audio applications and for me it is useless.

Please someone tell me why is Dell selling these obsolete equipments. It seems the only thing that we can do is spread the word so that tis wont happen to many others.

10 Posts

September 27th, 2009 16:00

Does anyone know of a latency problem on teh Inspiron 1525? 


Dave-

13 Posts

September 27th, 2009 17:00

what is watchdog and i agree, get somethin going i will follow, i am fed up with companies selling stuff they know is junk and just doing it and dealing with it when enough people complain, calling something a "studio" when it cant do simple recording applications is a fraud and a complete joke. not ver funny at 800. no way out of this, they either knew or didnt know and were neglegent. i tell everyone about my experience with dell. sad indeed that they would do something as ridiculous as this, did they think people would just sit back and go, oh well i spent a grand on a table trey. i bought it ONLY for recording. the one thing it cant do. go figure. best wishes. let me know where to sign or who to call. id be happy to.

5 Practitioner

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274.2K Posts

September 28th, 2009 08:00

Jared,

 

I don't know anything at all about 1747. Thursday is my last day of work before vacation, so I am balancing tying up loose ends at home and in the office, and watching the latency issues being worked. No time at all to look at new and upcoming product.

 

 

12 Posts

September 28th, 2009 08:00

Bill,

I was on Dell.com grabbing some driver info for my 1737.  I noticed a new product called the 1747 on the drop down.  I checked out the specs and noticed some significant changes in the hardware.  Do you know anything about this?  Thanks.

 

jared

56 Posts

September 28th, 2009 11:00

Does that mean we might see a bios fix for it this week? That is if a bios fix will actually fix the problem...

5 Practitioner

 • 

274.2K Posts

September 28th, 2009 11:00

Unfortunately my vacation schedule has nothing to do with Quality Sustaining Engineerings BIOS development efforts. But I can tell you that a lot more engineers are working on latency across multiple platforms than there were 2 weeks ago. Something's gotta give.

12 Posts

September 29th, 2009 09:00

Bill,

Glad to hear you will be getting a vaca.  You clearly deserve it.  Just to clarify my original question, I was assuming since you were part of the Studio support team you would be aware of the newest Studio laptop (Studio 1747).  I noticed that while the specs were generally the same as the Studio 1737, the the hardware manufacturers were very different from the majority of other Studio laptops.  I was wondering if you knew whether the Studio 1747 performs better in the DPC area than previous Studios?  Thanks and take care.

jared

21 Posts

September 29th, 2009 10:00

.... I noticed that while the specs were generally the same as the Studio 1737, the the hardware manufacturers were very different from the majority of other Studio laptops....

jared

Hi Jared,

Is there any chance you could provide a link to the spec list?  I don't seem to be able to find any info on the 1747 (you can converstaion or email me if you not think it right on here). I'm particularly intersted as both my 1737's have been returned this week, and I'm now starting the hunt for 2 good audio laptops again, going back to a dell isn't out of the question if DPC latency is resolved, and it'd be great to see 1747 spec... I actually liked the 1737's in almost everything but audio performance!

2 Posts

September 29th, 2009 21:00

I canceled the order I had in for the Studio 1737, just too risky to be without the ability to record clear audio in a $2k machine.  I did notice today that the Studio 17 has the option for the Intel Core i7 720QM 1.6GHz (2.8 GHz Turbo Mode, 6MB Cache) processors now, and I didn't see that as an option a couple weeks ago.  Is it possible these new i7 procs are what are being tagged the 1747?  I went all the way through the customization process, and never saw a model number except Studio 17.  Just curious if anyone knows if these systems with the i7 processors have the same latency issue with audio? If not, they look like they'd make a sweet machine.

 

Arlo


18 Posts

September 30th, 2009 05:00

I would avoid these computers until someone from Dell says specifically that these issues have been fixed and statement is released saying so. 

There are some people who have their computers working by performing a fix on them which isn't a real solution (It doesn't work for eveyone).  Just beware that when someone says their computer is performing, it doesn't mean yours will.

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