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Deferred Procedure Calls problem

 
    • a dit :...
    • Utilisateur
    • 21 août 2008, 9h19m

    Deferred Procedure Calls problem

    Hi,

    Recently I noticed that my computer (laptop) is under load (~50%) even if I'm not producing any load. Also it (task manager) didn't show (hidden usage) what process was using so much CPU time.

    Then I ran Process "Explorer" and noticed that Deferred Procedure Calls (DPC) usage is constantly pretty high (~50%). To be sure that I don't have malfunctional hardware or driver problems I ran some diagnostics and reinstalled video and audio drivers. As I excepted then everything was fine and working.

    After I ran KernRate I found that my sound chip driver (camc6hal.sys) produces such high load.



    I noticed yesterday that DPC usage will increase instantly if I pause or stop my media player (foobar2000, sometimes WMP, but also tested it with Winamp), so I made some tests.

    1.
    Media player status: playing
    Last.fm client status: running



    2.
    Media player status: playing
    Last.fm client status: not running



    3.
    Media player status: stopped
    Last.fm client status: running



    4.
    Media player status: stopped
    Last.fm client status: not running



    I didn't run any debugger, but seems that last.fm client (or plugin) panically tries to communicate with my sound device.

    OS: Windows XP Professional
    Sound chip: Conexant AMC

    I didn't found older version of last.fm client, but it would be cool if I can test it with older version (they was working fine) of last.fm client. Then I can be really sure that isn't hardware issue.

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    • dougma a dit :...
    • Alumni
    • 21 août 2008, 13h05m

    Re: Deferred Procedure Calls problem

    sakuza_warrior said:
    I noticed yesterday that DPC usage will increase instantly if I pause or stop my media player (foobar2000, sometimes WMP, but also tested it with Winamp), so I made some tests.


    curious... it's almost certainly going to be a hardware/driver problem. possibly agravated by lastfm as you've noticed. checked for latest drivers?

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    • a dit :...
    • Utilisateur
    • 21 août 2008, 16h44m
    Downgraded to version 1.5.1.29527 and voila... it is working normally again... Houston we have a problem! :( BUG!

    dougma, yes I did it (reinstalled audio and video drivers) and quite many times, but no help. Also I reinstalled last.fm client (version 1.5.2) least 4 times, but again - no help.

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    • dougma a dit :...
    • Alumni
    • 21 août 2008, 17h36m
    sakuza_warrior said:
    Downgraded to version 1.5.1.29527 and voila... it is working normally again... Houston we have a problem! :( BUG!

    Nice work with the bi-section!

    Next-step would be to diff. :)

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    • a dit :...
    • Utilisateur
    • 26 août 2008, 13h23m
    Anyway, I have been using 1.5.1 version 3 days for now and everything seems to be ok. I tried once again 1.5.2 version, but I had same problems like before.

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    • dougma a dit :...
    • Alumni
    • 27 août 2008, 15h42m
    sakuza_warrior said:
    Anyway, I have been using 1.5.1 version 3 days for now and everything seems to be ok. I tried once again 1.5.2 version, but I had same problems like before.
    Interesting... because according to http://static.last.fm/client/ChangeLog.txt all that's changed from 1.5.1.29527 is translations.

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