How about this problem of latency with computers portable studio?
Hi guys,.
After almost a year of bored on my computer laptop dell studio and its crazy latency issues I have that to give it another go at the Dell Forum. Is there any fix for this widespread problem. I am a user of windows 7 and couldn't really find a solution for this google search.
I would like to hear from you guys.
See you soon,.
Jon
A problem with the DPC latency issue is that it is a symptom with a number of possible causes, software and hardware. It can be caused by a bad driver written and may not even have anything to do with Dell. Or it could; I'm just pointing out some of the complexities. For example, stan_-_ wrote that he has "problems", but maybe it's having the same symptoms caused by a different problem than the problem causing the symptoms on cell phone JonHil. (stan_-_, you use the latency Checker tool. There are instructions on the web page of the tool on how to use it to isolate a pilot that could be causing the latency. Also if the latency is cyclical it is probably caused by a device or a program at specified intervals.) Most of my knowledge of the DPC latency is 2 wires:
Latency DPC Studio 1737 thread started on June 13, 2009
and
Studio XPS 1340 latency thread started February 23, 2009
The main models that have been affected at this time were the Studio 1735 1737 Studio, Studio 1535, 1537 Studio and Studio XPS 1340 and Vostro models. Maybe Studio 1555 also.
Over the years I didn't have Dell to put a large part of its resources trying to solve the existing audio problems. They seem to release a new model of laptop once a month and probably have their hands full think of names for each of them. Once a production model without doubt they are already deeply in the development of future models. However, in this case, they seek to solve the problem, for 2 reasons in my opinion. One was that the Studio XPS line was a new line of premium that they wanted to work right, and the other is that one of the people from Dell with a sweater got involved and pleaded for a fix for 14 months. The history of it is as follows.
Dell came with a revision of BIOS (11) that fixed latency dpc on Studio XPS 1340 model, as long as the units have been configured with the Intel WLAN cards and not Dell cards (Broadcom). Encouraged by that success, the plan of engineers was to get a fix of the BIOS for the Studio 1737 and then apply that knowledge to a difficulty for other models, but that never happened. The A07 BIOS was released in September ' 09 and what it was supposed to be the fix, but it was a big flop. They re - worked and published A08 almost 3 months later. The Dell guy who was tube communication between posters and Dell engineers was Bill B, who a few months later wrote:
"The last word I got was that the 1737 has a design limitation that prevents the latency issues to be resolved. The platform is moved to a new team of engineers. The new team reached out to me for feedback on the recent release of BIOS. I knew it was in no way a solution and this thread is passed to a few comments recent choice. "(The thread of latency Studio 1737)
It was about Bill B last post on the thread. He has 13 months he wrote these words, but no Dell never returned the "new engineering team" done with the problem. My guess is that the engineers had shot their wad with A08 and just left falling on it after this - so no hope for much less later 1737 models or 1735, who have time dpc latency, but whose root cause could easily be unrelated to earlier models. As seen, the fix for the Studio XPS 1340 did translates not one difficulty for the other line Studio, so there was never a chance for a unique solution. Bill B pointed out that the models released after the Studio 1737 lacked the same latency issues designed in dpc as those before, which if true gives hope that, on later models this is a driver or a problem with wireless.
One thing that came out of all that was that some wireless network adapters are a source of dpc latency regardless because there are other cases on the same computer. The worst offenders are the brand of cards (Broadcom), in particular the Dell from Dell 1515.
Of interest, there is also a workaround for the Studio 1737 developed by DJQuartz, which is to suspend the ACPI under Win XP using Process Explorer. Some people got it to work in Vista and 7 with process Hacker. The engineering team is convinced that the dpc latency was caused by the physical design of the card system, but Bill B thought they were wrong because of the DJQuartz.
Another solution was to create a hackintosh running Apple OSX on the Studio 1737. It worked because "DPC" is a Windows procedure (which creates a lot of latency with a poorly written driver) is not in the Apple OS or Linux. If you want to buy a Mac, you can try this. The problem will be in obtaining drivers for your computer that you can install.
So to summarize:
> There are different causes of latency dpc even on the same model as the others, much less through the lines or brands of manufacturers - is not only a problem of Dell
> there are still uncertainties about the fundamental nature of all the underlying causes of the problem
> there are some causes that Dell just doesn't know how to fix despite a lot of time and effort - you should read the thread of latency Studio 1737 together to get a feel for the amount of effort
> there is no hope of a Dell solution on existing models, in my opinion (I may be wrong)
> some of the causes are user serviceable. A few months ago DJQuartz reported that the dpc latency spikes are now under control the sound Studio 1737 even without using his circumvention of ACPI, with the latest drivers and BIOS revisions. There the last Chipset of Intel wireless network adapter and drivers touchpad. It is still using XP is the best Windows OS for audio work.
Tags: Dell Laptop
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