Author: raboof
Subject: ndis.sys- High DPC latenecy / High DPC CPU usage
Posted: 28 March 2013 at 12:17am
Hi all,
I joined this group specifically to post a solution that worked for me.
First off, brief specs:
SAGER NP5973 laptop
Win7 32-bit with 4GB RAM (patched PAE kernel for 4GB memory access)
NVIDIA Quadro FX1600M
Intel 4965 AGN wireless adapter
I recently experienced a change in CPU behavior --> running at about 10-15% when IDLE. It turned out to be a high latency issue as detected by LatencyMon, which pointed to NDIS.SYS as the problem.
Long story short - I updated ALL hardware drivers, tried all Googled tricks and got NO result. The only thing that had any effect was to disable the AGN adapter --> then the CPU would drop back to "normal (0 to 1% at IDLE).
Solution: I remembered that I recently updated the NVIDIA drivers for my system. I was running Quadro drivers v195.62 and had upgraded to v311.35. I uninstalled the new driver and ran the Standard VGA adapter -> CPU went to normal (0 to 1% at IDLE). I re-installed the new NVIDIA driver (driver ONLY) and CPU went up to 15% at IDLE! I then re-installed the OLDER v195.62 NVIDIA driver and all went back to normal (0 to 1% at IDLE) ! I don't know why but in *my* case, although things pointed at the AGN drivers as being the problem, it was the combination with the new NVIDIA drivers that was truly at fault.
Some additional notes:
- I am running the latest Intel drivers (Wireless.v15.3.1)
- my system has a built-in Realtek audio device. I found the best version of the HDAC drivers is R2.42 --> the latest version (R2.70) would cause a hang on install.
Hope this helps someone cause it wasted my whole day Image may be NSFW.
Clik here to view.
Cheers!
Image may be NSFW.
Clik here to view.
Subject: ndis.sys- High DPC latenecy / High DPC CPU usage
Posted: 28 March 2013 at 12:17am
Hi all,
I joined this group specifically to post a solution that worked for me.
First off, brief specs:
SAGER NP5973 laptop
Win7 32-bit with 4GB RAM (patched PAE kernel for 4GB memory access)
NVIDIA Quadro FX1600M
Intel 4965 AGN wireless adapter
I recently experienced a change in CPU behavior --> running at about 10-15% when IDLE. It turned out to be a high latency issue as detected by LatencyMon, which pointed to NDIS.SYS as the problem.
Long story short - I updated ALL hardware drivers, tried all Googled tricks and got NO result. The only thing that had any effect was to disable the AGN adapter --> then the CPU would drop back to "normal (0 to 1% at IDLE).
Solution: I remembered that I recently updated the NVIDIA drivers for my system. I was running Quadro drivers v195.62 and had upgraded to v311.35. I uninstalled the new driver and ran the Standard VGA adapter -> CPU went to normal (0 to 1% at IDLE). I re-installed the new NVIDIA driver (driver ONLY) and CPU went up to 15% at IDLE! I then re-installed the OLDER v195.62 NVIDIA driver and all went back to normal (0 to 1% at IDLE) ! I don't know why but in *my* case, although things pointed at the AGN drivers as being the problem, it was the combination with the new NVIDIA drivers that was truly at fault.
Some additional notes:
- I am running the latest Intel drivers (Wireless.v15.3.1)
- my system has a built-in Realtek audio device. I found the best version of the HDAC drivers is R2.42 --> the latest version (R2.70) would cause a hang on install.
Hope this helps someone cause it wasted my whole day Image may be NSFW.
Clik here to view.
Cheers!
Image may be NSFW.
Clik here to view.
