Windows 7 Forums

Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: high dpc latency 3.8 seconds! ataport.sys intermittent a/v buzz/freeze

05 Dec 2011   #1
drjeffreyo

windows 7 ultimate x64 sp1 oem via p2p download
 
 
high dpc latency 3.8 seconds! ataport.sys intermittent a/v buzz/freeze

Microsoft drivers are running the onboard hd audio, the realtek drivers don't seem to load; i've downloaded some updates for this jurassic MB from asus for windows 7 and they can't find the hd audio device [that's present and working] so they won't install. i've also downloaded some updated drivers from realtek but haven't tried rebooting installing one of those yet.
the issue: intermittently the screen will freeze for just about 4 seconds, if there's audio playing there will be loud buzzing like a 120Hz leak through a bad PSU. This will happen regardless of what apps are running. There are no programs crashing, no bsod's and after the timeout everything still works ok.
Using Thesycon's dpc latency checker the spike tops the scale at the time of the event. Using resplendence latency monitor 3.0 I can see 3,800,000 microsecond delays attributed to ataport.sys. The IDE drivers running the sata and atapi are also all microsoft's since asus has no updates for the ide controller. nvidia's chipset update 1554 seems to have updated some things but I have to reboot to see if it's had any effect. There'w an ide folder in that update but when running setup there's no sata/ide install option, and there's no other way to install it.
The video is onboard geforce and though this is showing an nvidia driver there's no control panel available-this is not a concern.
If I peruse device manager I seem to have duplicate instances of several devices:
under ide ata/atapi controllers I have two instances of ata channel 0, two of ata channel 1 and two of standard dual pci ide controller.
The monitor is listed as generic but it works fine so I haven't installed the OEM AOC software.
Under sound/video/game controllers there WERE two instances of high definition audio device, but since the realtek update one now says realtek; i don't know if it will stay like this untill i reboot.
my brain hurts.
I've imaged the system so I can always get back to square one and try again.
Here's a new record: latency monitor now shows an isr execution time of 17,006,397,785,633 microseconds and dpc time of 17,028,594,909,264 microseconds after a seven minute run before it got caught in a floating point error message loop--i'll upload the report. i don't trust this prog 100% since it reports my 2.7Ghz cpu's running at 3.549GHz [if only it could...] and that I shoud disable wireless adapters that don't exist.
I've got a torch, saws, a few hammers and axes and a mig welder: what should I do next?
jeff




Attached Files
File Type: txt latencymonitor.txt (6.5 KB, 32 views)
My System SpecsSystem Spec
.
05 Dec 2011   #2
drjeffreyo

windows 7 ultimate x64 sp1 oem via p2p download
 
 
realtek audio icon now present

but the latency issue still persists.
where's that hammer...
My System SpecsSystem Spec
06 Dec 2011   #3
drjeffreyo

windows 7 ultimate x64 sp1 oem via p2p download
 
 

anyone have a clue?
My System SpecsSystem Spec
.

06 Dec 2011   #4
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

High Latency is often a driver problem. Run this program. It will show you what the situation is and also gives you clues about the culprits.
My System SpecsSystem Spec
08 Dec 2011   #5
drjeffreyo

windows 7 ultimate x64 sp1 oem via p2p download
 
 
Hi

sorry for the late reply, and thanks for yours-I gave up and reinstalled windows 7. Here's the report from latency monitor, it seems to flag ataport.sys as the cause. I can;t seem to find any updates for this, and all versions of software for the ide and sata controls in the chipset don't differ [the one installed with windows 7 and several versions from nvidia]. It also thinks my pcu is running at 3.4GHz but that may be a glitch.
Perhaps a clue exists which points to a basic hardware issue? Hmmm...
Right now the pc is using a copy [real legit official yadda yadda] of windows xp pro and the bios settings have all been switched back to 'auto' and that freaky 5 second freeze persists. All the drivers are updated as is the OS. DPC latency checker says " Some device drivers on this machine behave bad and will probably cause drop-outs in real-time audio and/or video streams. To isolate the misbehaving driver use Device Manager and disable/re-enable various devices, one at a time. Try network and W-LAN adapters, modems, internal sound devices, USB host controllers, etc." Peak latency after just a few minutes of running IE are 760ms; earlier today it was 1.5s after running a few hours.
I'm stumped.
jeff


Attached Files
File Type: rar latencymonitor.rar (1.7 KB, 34 views)
My System SpecsSystem Spec
17 Dec 2011   #6
drjeffreyo

windows 7 ultimate x64 sp1 oem via p2p download
 
 
3931081 microsecond latency issue persists

Still intermittent; happens with xp pro and 7 in all stages of updates/service packs and with all versions of device drivers. Logically this is a hardware issue; does anyone have a clue?
My System SpecsSystem Spec
17 Dec 2011   #7
Snookie

Windows 7 Home Premium 32bit
 
 

I have a similar problem when playing music on my pc using on-board sound card get intermittant crackles and popping sounds. It so spoils my enjoyment of listening to music via Media Player or iTunes that I now listen with my iPod istead.

I'm not a technical expert so am left floundering when it comes to the more detailed checking of latency issues.

It was suggested that I installed a seperate sound card, but looking for a suitable one was so confusing with all the various specs that I gave up ....
My System SpecsSystem Spec
19 Dec 2011   #8
drjeffreyo

windows 7 ultimate x64 sp1 oem via p2p download
 
 
not helping

so i guess you don't have a clue.
My System SpecsSystem Spec
21 Dec 2011   #9
Snookie

Windows 7 Home Premium 32bit
 
 

You are right there. Need an expert help to solve this one .....
My System SpecsSystem Spec
12 Mar 2013   #10
R4za

Windows 7 Professional 32 bit
 
 

I have the same problem, and have found multiple unresolved instances of it discussed on the web.

Somebody needs to figure this out and get the word out.
My System SpecsSystem Spec
Reply

 high dpc latency 3.8 seconds! ataport.sys intermittent a/v buzz/freeze




Thread Tools




Similar help and support threads
Thread Forum
DPC Latency ataport.sys
I've been having bad audio cut outs for a solid 3 months now. I've tried several different things to try and narrow down the driver but nothing has solved the issue. I've been using LatencyMon to track whats happening and I have it narrowed to just the ataport.sys now. My most recent change to...
Drivers
Intermittent BSOD, diag says ataport is culprit
Recently I am getting more and more frequently BSODs which nearly always indicate "Probably caused by : ataport.SYS". My laptop is a SAMSUNG NP300V4A running Win 7 home premium 64 bit and uses a Seagate ST500LM012 HDD. I am also getting sporadic errors like "not enough timers available" when...
BSOD Help and Support
System interupts causing high CPU usage, possibly from ataport.sys
I been working on this for a month now and have had no luck looking in other posts. System interrupts uses one core of my computer 100%. I ran windows performance analyzer and it seems to be caused by ataport.sys . The problem happens periodically and will last for a couple of hours then go away. I...
Performance & Maintenance
High Latency - How to Fix?
I am having a lot of problems with the audio. When I play music, the sound seems to jitter, slow, etc. I've searched for hours for a fix, but couldn't find any help. I used DPC Latency Checker and got a lot of red bars. And used LatencyMon and there are many driver files going over 20ms. What...
Music, Pictures & Video
High CPU usage, low fps, high latency.
Since Jan-Feb of this year I have encountered the following issue while trying to play games on my laptop. Abnormally High CPU Usage Extremely low FPS - After 5-20 Mins of play. Extremely High latency to servers - from 300 - 900 after 5 - 20 mins of play. The thing is all of these started 1...
Performance & Maintenance
High latency DC in WoW
So I was having trouble connecting at all to the wireless network in my home but I worked through that with drivers and what now but now I am having a different problem. I connect to the net and stay on just fine, but while playing World of Warcraft, I will be running along just fine and get a...
Network & Sharing


Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 09:21.

Twitter Facebook Google+



Windows 7 Forums

Seven Forums Android App Seven Forums IOS App