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2 Posts

08-09-2013

Wollongong

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  • Registered: ‎08-09-2013
  • Location: Wollongong
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DPC Latency problems with Intel 82579LM based Network Controller in T420 on Windows 8

2013-08-09, 11:56 AM

I have been experiencing audio dropouts on my Thinkpad T420 related to DPC spikes and have tracked the issue down to the driver for the 82579LM Network Controller. Please see the message below I posted in the Intel forum relating to the issue.

 

http://communities.intel.com/thread/43498

 

Lenovo, please release an Ethernet (LAN) driver for the 82579LM in the T420 that is fully compatible with Windows 8 (or work with Intel on a solution to this problem). I noticed that you do not have a driver listed for Windows 8 on this site.

 

This problem makes the T420 useless for creating/editing professional audio whilst the Ethernet Card is enabled in the system. It also causes issues which may affect other users as well, such as intermittent mouse freezes, video pausing, etc so it is important this is resolved.

 

The exact model of my T420 for reference is 4236J29.

 

Thanks.

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12 Posts

06-04-2012

Canada

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  • Posts: 12
  • Registered: ‎06-04-2012
  • Location: Canada
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Re: DPC Latency problems with Intel 82579LM based Network Controller in T420 on Windows 8

2013-12-28, 4:57 AM

 

Install an older driver from HP

 

http://forums.lenovo.com/t5/T400-T500-and-newer-T-series/DPC-latency-audio-mouse-skip-and-stutter-on-t420s/td-p/602481

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