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    Weird USB issue

    Discussion in 'Alienware M11x' started by Rishwin, Nov 22, 2011.

  1. Rishwin

    Rishwin Notebook Deity

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    Last night i was copying something from my external HDD to my M11x (both using USB 3), and i noticed that while it was copying my mouse (plugged into the USB slot behind the HDD) was jerking and lagging.

    I tested the trackpad and the cursor moved freely without issues, but the moment i tried to use the mouse the cursor became jerky & choppy again. Once the copying is over, everything's fine.

    Is my HDD copying at the entire USB bandwidth which is slowing down my mouse?

    This happened yesterday while plugged in, and again just now running off battery.
     
    Rishwin, Nov 22, 2011
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  2. darkdomino

    darkdomino Notebook Deity

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    I've noticed a weird kind of lag that occasionally happens in Windows when there is a lot of disk activity. Just like you said, the mouse will lag a bit... but then "catch up" and everything is fine.

    It's not really noticeable for me, and only happens rarely. If yours is doing it consistently then you may have a bad USB port. Might wanna call Dell?
     
    darkdomino, Nov 22, 2011
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  3. bouddha

    bouddha Notebook Geek

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    I think the USB bus was just too busy dealing with the transfert to allow smooth operation of the mouse.
    had something similar when I had all my music on an external USB HDD and I couldn't really use my comp without having stuttering on the music, it seems that USB is quite sensitive to processor or bus activity.
     
    bouddha, Nov 23, 2011
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