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Platonio
Posts: 7
Registered: ‎09-26-2011
Location: Nürnberg
0
Accepted Solution

X220 high dpc latency

Hey,

 

I´m very disappointed at the moment of my new X220.

 

I´ve got very high dpc latency when I´m using the integrated 82579LM Adapter.

Sound is stuttering while surfing playing music.

 

With the Wireless 6205 all is fine!

 

What I have already tried:

 

-Windows new install (Lenovo clean install tutorial)

-Newest Intel driver for the nic

-Newest Lenovo driver for the nic

-Set powermanager to max performance

-BIOS default

 

All drivers, BIOS, utilities(such as powermanager etc.) and windows are up to date.

 

Any suggestions?

 

 

 

Guru
ColonelONeill
Posts: 6,784
Registered: ‎12-26-2009
Location: Toronto
0

Re: X220 high dpc latency

Try LatencyMon. It'll pinpoint exactly which driver is causing the issue. Sometimes some other unrelated driver causes the issue.
W520: i7-2720QM, Q2000M at 1090/695/1390, 22GB RAM, 500GB HDD, FHD screen
TPT1: 1839-23U, stock ICS
X61T: L7500, 3GB RAM, 500GB HDD, XGA screen, Ultrabase
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Platonio
Posts: 7
Registered: ‎09-26-2011
Location: Nürnberg
0

Re: X220 high dpc latency

[ Edited ]

Okay, I tried LatencyMon.

 

Am I right, that the driver ndis.sys and the CPU?! is causing the issue?

 

How can I solve this?

http://abload.de/image.php?img=dpcbd82k.png

Guru
PeterTWJ
Posts: 1,102
Registered: ‎05-29-2010
Location: Singapore
0

Re: X220 high dpc latency

Hi Platonio

Try using Intel drivers instead to see if the latency issues could be resolved.

Chipset:
http://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&ProdId=816&DwnldID=20019&ProductFamily=Chipse...
 

 

Network Card:
http://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&DwnldID=18713&ProdId=3299&lang=eng&OSVersion=...

I am using Chipset driver from Intel and NIC driver from Lenovo and it's working smoothly. You could try Intel new NIC driver, they may provide some performance improvement, etc. for the newer driver.

Cheers! :smileyvery-happy:

Peter

=============================================
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Mark it as solved if the solution works for you, so it could be reference for others in the future :smileyvery-happy:

 

Refunded Set: W510, 4876-A11

Current Set: W520, 4284-A99

 

Dolby Home Theater v4 (ThinkMix V2)!

http://forums.lenovo.com/t5/W-Series-ThinkPad-Lapt​ops/W520-Sound-Enhancement-Thread/m-p/451401#M155...

 

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Platonio
Posts: 7
Registered: ‎09-26-2011
Location: Nürnberg
0

Re: X220 high dpc latency

Thanks for your help, but the problem still exists.
This machine drives me crazy...
You can´t work smoothly with traffic on the nic...also the mouse is lagging and jumping.
http://www.abload.de/image.php?img=dpc414et4.png

http://www.abload.de/image.php?img=dpc36pe9x.png

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r00bin
Posts: 16
Registered: ‎10-19-2011
Location: Minnesota
0

Re: X220 high dpc latency

[ Edited ]

I have the exact same problem.

 

It took me several week to realize that it was the ethernet that was causing the audio stuttering and the high DPC latency. All of my drivers are up to date and I'm on AC power. I've removed the wired NIC drivers in device manager. and see if the windows 7 default drivers work. I need this gigabit ethernet as a do a lot of data transfer between other computers on my lan. Wireless simply isn't an option.

 

As for the jumpy mouse, i believe it's due to poor grounding in your AC adapter (pathetic levovo...) Take a look at this thread

http://forums.lenovo.com/t5/X-Series-ThinkPad-Laptops/Alternative-power-adapters-for-the-X220/td-p/4...

 

It appears the throttling and mouse jumping problem can be solved with a 3rd party power adapter. I my self just ordered this http://www.amazon.com/Anker-Laptop-Adapter-Supply-ThinkPad/dp/B004764AIQ/ref=pd_cp_e_1 which is listed in that thread as solving all throttling and mouse jumping problems. 

 

 

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r00bin
Posts: 16
Registered: ‎10-19-2011
Location: Minnesota
0

Re: X220 high dpc latency

[ Edited ]

YES!, Solution!:

 

1. Go to device manager

2. Right click on 82579LM Gigabit ethernet and click uninstall. A popup will appear and check "delete drivers"

3. Let the computer uninstall the drivers.

4. Reboot computer

5. With wifi on, let windows automatically install drivers for the gigabit card.

 

DONE!

 

Edit: Reinstalling the drivers helped however I'm still getting huge dpc latency spikes when downloading files....This is ridiculous.

 


 

Guru
ColonelONeill
Posts: 6,784
Registered: ‎12-26-2009
Location: Toronto
0

Re: X220 high dpc latency

What if you try ASIO4ALL?
W520: i7-2720QM, Q2000M at 1090/695/1390, 22GB RAM, 500GB HDD, FHD screen
TPT1: 1839-23U, stock ICS
X61T: L7500, 3GB RAM, 500GB HDD, XGA screen, Ultrabase
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orion9727
Posts: 220
Registered: ‎11-01-2011
Location: boston
0

Re: X220 high dpc latency

lookie lookie.
half way down on this review you see it and the fix.
http://www.notebookcheck.net/Review-Lenovo-ThinkPad-X220-IPS-Subnotebook.55639.0.html
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Platonio
Posts: 7
Registered: ‎09-26-2011
Location: Nürnberg
0

Re: X220 high dpc latency

No, that´s not the solution. Have you read my first post?
With Wireless no high dpc latency occurs.
Only with the integrated LAN 82579LM adapter!