Tuesday, November 16, 2010 3:51 PM
So to keep this short, i have a seperate boot partition with Windows 7 64 bit installed. I use this partition solely for DJing, therefore i have installed; itunes, my DJ software, and windows updates. I use an external USB soundcard for routing the sound from the dj software to my speakers.
The problem im having is the DPC latency spikes that are caused by ACPI.sys which as a result cause pops and clicks in my audio playback. When ACPI is disabled in device manager, the spikes go away and audio playback is fine. However, when i do this i cannot keep an eye on the status of my battery etc and ive heard that my system will underperform with it disabled.
Therefore i am writing to seek a profesional opinion as to the best way to go about this problem. I have racked my brain/the internet for a year to find the answer but cant seem to figure it out. I have seen some solutions that may work, but wanted to know also if this would work on my laptop:
Option 1: Install XP as a standard pc (can this be done with 64 bit)? CAn it be done at all?
Option 2: Install windows 7 with ACPI disabled in the BIOS? Would this even work?
Option 3: Disable acpi.sys. Dont really want to do this because of the lack of battery management.
Core Duo Processor @ 2.66ghz
Gefore 9650M GT 1GB Graphics
Windows 7 64 Bit
Thanks in advance for any help you may be able to provide!
Wednesday, November 17, 2010 2:15 PMAre you sure that the spikes aren't simply caused by some active power saving mode? If that's the case, then choosing the High Performance mode should fix this.
Tim De Baets
Wednesday, November 17, 2010 3:53 PM
God i wish that were the case! I run the laptop in High Performance ALL the time, regardless of being connected to power supply or not. As i need all the power i can get for graphics etc.
I know for sure that the spikes are caused by the acpi.sys as it has been discussed on many other digital DJing/music production forums (and the spikes disapear when its disabled). Apparently the problem is caused because the sound card is allowed to share IRQ's with other USB devices, (this is why people have suggested running windows with acpi disabled so a different IRQ can be assigned to each device, bear in mind im not THAT knowledgeable about the inner workings of a computer so dont know if this is true).
This is something that im surprised hasnt been brought up before on these forums to be honest! I would have thought its a problem which has roots deep in the inner workings of the computer and im sure theres no solution but its worth a try!
Wednesday, February 02, 2011 9:54 AMBump as that was not an answer and the problem still exists. Still having to disable "ACPI power management" in device manager to get rid of pops and clicks in audio