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High Latency, Severe Audio/Video Buzz/Lag

nosch455

New member
Joined
Sep 7, 2015
Posts
3
Hello! First post here, and I'm helping someone can be of help as I've now gone through two replacement computers and countless hours of working back and forth with Dell.

Running Windows 7 x64 (on a Dell M4800, i7-4810MQ, 16GB RAM, NVIDIA Audio, Intel Dual Band Wireless-AC 7260 wireless card, Sandisk 1TB SSD) Whenever I'm running any sort of audio/video, I get horrible buzzing and lagging - this has been going on for almost a year now with no end in sight. I've run DPC Latency Checker and LatencyMon, and it appears that storport.sys seems to be the culprit. The problem is that it isn't super consistent - I'll start up my machine and within a minute it's buzzing, then 20 minutes later I get a respite, then it'll be back worse than before. I've been trying to resolve this with Dell, and they've even sent me a replacement machine in case it was hardware-related with no luck. Their response now is basically clean install Windows and start over, which really doesn't help.
Microsoft Virtual WiFi Miniport Adapter 3 DISABLED.jpg
Here's a screenshot of DPC Latency Checker and LatencyMon, as well as my current Drivers readout from LatencyMon.
2015_09_07-Drivers.PNG

It's worth noting that I tried disabling drivers one-by-one, and when I disabled my wireless card, the problem stopped immediately as seen in a screenshot below. However when using Ethernet, the problem came right back, albiet less frequently (instead of every second or two, it was maybe every 20 seconds).
Intel(R) Dual Band Wireless-AC 7260 2 DISABLE.jpg

Also suspected culprits that didn't end up helping were: disabling backups of open tasks in Crashplan, disabling the TPC Network driver, whether using the internet vs. media player, disabling Dell Diag Control Device, and disabling Intel SuperSpeed. I don't know if it makes a difference, but the only USB connections I have are out to my monitor via USB2 on a docking station which has a tablet connected, and the Bluetooth dongle for my Logitech mouse (the lagging started far before I began using this, though). Other peripherals are two monitors (one via DisplayPort, one via DVI), a keyboard connected via PS/2, and audio out via the headphone port on the docking station. It should also be noted that the buzz/lagg persists on or off the docking station.

If anyone could help, that would be huge!! I've tried to provide as much information as possible, but anything additional can be provided. I'm going nuts over here, and have no idea what to do next. Thank you so much!!!
 
Hello! First post here, and I'm helping someone can be of help as I've now gone through two replacement computers and countless hours of working back and forth with Dell.

Running Windows 7 x64 (on a Dell M4800, i7-4810MQ, 16GB RAM, NVIDIA Audio, Intel Dual Band Wireless-AC 7260 wireless card, Sandisk 1TB SSD) Whenever I'm running any sort of audio/video, I get horrible buzzing and lagging - this has been going on for almost a year now with no end in sight. I've run DPC Latency Checker and LatencyMon, and it appears that storport.sys seems to be the culprit. The problem is that it isn't super consistent - I'll start up my machine and within a minute it's buzzing, then 20 minutes later I get a respite, then it'll be back worse than before. I've been trying to resolve this with Dell, and they've even sent me a replacement machine in case it was hardware-related with no luck. Their response now is basically clean install Windows and start over, which really doesn't help.
View attachment 16206
Here's a screenshot of DPC Latency Checker and LatencyMon, as well as my current Drivers readout from LatencyMon.
View attachment 16204

It's worth noting that I tried disabling drivers one-by-one, and when I disabled my wireless card, the problem stopped immediately as seen in a screenshot below. However when using Ethernet, the problem came right back, albiet less frequently (instead of every second or two, it was maybe every 20 seconds).
View attachment 16205

Also suspected culprits that didn't end up helping were: disabling backups of open tasks in Crashplan, disabling the TPC Network driver, whether using the internet vs. media player, disabling Dell Diag Control Device, and disabling Intel SuperSpeed. I don't know if it makes a difference, but the only USB connections I have are out to my monitor via USB2 on a docking station which has a tablet connected, and the Bluetooth dongle for my Logitech mouse (the lagging started far before I began using this, though). Other peripherals are two monitors (one via DisplayPort, one via DVI), a keyboard connected via PS/2, and audio out via the headphone port on the docking station. It should also be noted that the buzz/lagg persists on or off the docking station.

If anyone could help, that would be huge!! I've tried to provide as much information as possible, but anything additional can be provided. I'm going nuts over here, and have no idea what to do next. Thank you so much!!!



Hi!
I am having the same issues since I switched my wifi card to ac 7260 and to win 10.
How did you fix the issue?
 
Hi!
I am having the same issues since I switched my wifi card to ac 7260 and to win 10.
How did you fix the issue?

I wish I could give you an answer. Unfortunately, the problem still persists, and Dell has been less than responsive since I've reached out on numerous occasions.
 
Hi!
I am having the same issues since I switched my wifi card to ac 7260 and to win 10.
How did you fix the issue?

I wish I could give you an answer. Unfortunately, the problem still persists, and Dell has been less than responsive since I've reached out on numerous occasions.

Well unfortunately that is what I have expected.
If I am having a look at search results for WIN 10 HIGH DPC I am wondering if the reason is the faulty wlan driver or if it has sth to do with the os.
I am trying to roll back to an older intel card but I doubt that it will work. Looks like MS is doing kinda hardware degradation to bring people to buy new hardware. Just like they always did thinking of Win95, XP etc.
Switched to a ubuntu desktop on an older notebook, no sound problems, more performance , also free :-)

This high dpc (NDIS.SYS) issue seems to occur on a lot of machines but it is not really a "known issue", there is not much information about the issue. I have no access to ms developer sites but would be interesting to check how microsoft cares about it.
 

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