11-17-2011 01:29 PM
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
All drivers, BIOS, utilities(such as powermanager etc.) and windows are up to date.
Solved! Go to Solution.
11-17-2011 08:05 PM
11-18-2011 03:15 AM - edited 11-18-2011 09:18 AM
Okay, I tried LatencyMon.
Am I right, that the driver ndis.sys and the CPU?! is causing the issue?
How can I solve this?
11-18-2011 08:14 PM
Try using Intel drivers instead to see if the latency issues could be resolved.
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.
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Mark it as solved if the solution works for you, so it could be reference for others in the future
Refunded Set: W510, 4876-A11
Current Set: W520, 4284-A99
Dolby Home Theater v4 (ThinkMix V2)!
11-19-2011 03:49 AM
12-01-2011 11:28 PM - edited 12-01-2011 11:31 PM
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
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-
12-01-2011 11:42 PM - edited 12-02-2011 12:08 AM
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.
Edit: Reinstalling the drivers helped however I'm still getting huge dpc latency spikes when downloading files....This is ridiculous.
12-02-2011 08:58 AM