05-23-2012 05:00 PM
Had the laptop for about a month now. Ran all necessary updates and still having a problem with audio playback constantly 'crackling'. Any sort of audio playback will do it, just annoying crackles in the background which make listening to anything impossible.
Enormous red spikes constantly on the DCP latency checker.
Windows 7 64bit
05-23-2012 06:23 PM
07-29-2012 12:07 PM
07-29-2012 12:59 PM
08-14-2012 11:39 PM
Was reading through this thread and wanted to check was there anything in particular that you had installed Prior to it happening? Its really hard to pin point what the cause as many factors come to my mind. Harware could be one of them but before i conclude it is hard ware would like to eliminate the possibilities of software first.
In the past there were something similar to this issues where by uninstalling the Mcafee Antivirus Did the trick. I woulod suggest trying to uninstall the Mcafee First and check for the changes (Only applies to thise that have Mcafee Preinstalled on the machine).
Do let me know of the changes.
08-24-2012 05:20 PM
Thanks for keeping this open. I don`t believe this started after any installs, but I don`t exactly recall when I started noticing it.
I've ran latency checker for a bit, which pointed to iaStor.sys (Intel Rapid Storage Driver). I tried installing different releases of these drivers, or finding an alternative but no luck.
I called Lenovo support and a technician remoted into my PC and checked that all drivers were up to date, but there was still no solution.
I found a thread which mentioned disabling the nVidia NVS 4200M, so I did this and the latency problem stopped. This of course is a temporary fix, and I would like to get to the bottom of it (however, it`s worth mentioning to anyone with this issue).
I use Symantec Endpoint Protection, as well as MBAM, but I don`t think they`re the culprit.
08-25-2012 10:55 AM
09-17-2012 06:59 AM
No, NVIDIA GPU isn't running at the time. The NVIDIA only kicks in during high intense graphics (games mostly).
Here are some screenshots of LatencyMon with and without the NVIDIA driver enabled.
09-17-2012 08:39 AM
I went back and don't see the spec's on your machine!
No CPU, memory etc which is a basis for analysis.
Clearly you have the right audio drivers and if it doing it with music playback from say Itunes or a music CD. I would have to say it must be a hardware problem in which you'd have to take it in for service.