03-02-2012 08:10 AM
Following up to my previous post, I've tried switching graphics modes, I've disconnected from the network, I've undocked, I've run on battery vs a/c. Basically, every permutation of possibilities. The glitchiness seems to occur regardless of whether the system is relatively sedate, whether I'm playing files from the local drive, reading from a physical CD, streaming, whatever. But it seems to go in phases. Interestingly, if I keep Task Manager open while I'm playing (and sorted by CPU usage, highest at the top), I see the glitches occur more often when heavier processes undergo a priority switch, "rise to the top" (e.g. firefox, rhapsody, eclipse, etc.). I suppose it could be a combination of CPU usage and disk I/O, memory paging, etc. Note that this occurs even while using my spiffy external SoundBlaster USB soundcard.
03-04-2012 09:29 AM
How about trying this? :
1. Downgrade to older Intel LAN driver:
2. Update Intel Chipset driver: (Download and Install) V9.3
Or this (if the above version does not work) V9.2
It occurs on other machines too:
Heard from a few that this resolves their sound, jerk, lag, etc. issues. Hope it works for you all.
Have a nice day!
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03-09-2012 10:25 AM
03-11-2012 11:42 AM - edited 03-11-2012 11:44 AM
That driver, the HP-sourced one, definitely helps.
However - would you folks be so kind as to fire up your media player of choice, start playing a song, run the DPC latency checker and then hold down the mute button on the keyboard?
I'm seeing DPC latency spikes as high as 426201us when holding it, and individual presses of the mute button trigger a spike of up to 4000us. Individual presses, of course, mute the sound so you don't hear a glitch, but holding it, it sounds like a badly scratched CD.
03-11-2012 02:25 PM
03-11-2012 02:39 PM - edited 03-11-2012 02:43 PM
For me there's a distinct chirping/skipping sound, plus the occasional 'grinding' or 'electrical interference' noise combined with screen freezing, so it's more than just toggling mute.
In any event, just pointing out another way to force DPC freakouts.
Me, I've been listening to music for the better part of two days now and shuffling ISO images back and forth across my wired LAN while running Prime95 and occasionally playing Portal all together...had very severe glitching with the newest driver, and since switching to the older HP-sourced version, so far no glitching that I haven't caused myself with the mute button.
Interesting to note that the support rep I spoke to on the phone, after consulting with nearby coworkers, concluded it's a system board defect requiring replacement...which raises the question: is there anyone who has the latest drivers, uses their Ethernet connection often, and has never experienced these spikes?
03-11-2012 02:51 PM
03-14-2012 04:36 AM
thanks a lot guys, this really seems to work! I got an error message after installing the HP drivers, saying something went wrong and asked me if I want to reinstall with the same settings... I just ignored this and within the last 24 hours I haven't hab a glitch / latency issue at all.
but it is really sad that lenovo didn't care about this massive issue and the community had to come up with a solution. shame on you lenovo! I paid over 2000 € for my W520 and some more money on accessories and thought I'd get a decent machine
06-21-2012 10:28 PM
I haven't had such luck after following the above steps, however, it seems to work by uninstalling the Conexant driver and using the Windows driver instead. Only thing is, the headphone output level is attenuated, similar to when Conexant Smart Audio is limiting the headphone level. Is there a way to avoid this?