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    A weird problem with my asus when running on battery

    Discussion in 'Asus' started by frogman23, Jun 18, 2008.

  1. frogman23

    frogman23 Notebook Enthusiast

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    hello all, i got a weird problem with my v1sn. Everything runs just fine when the ac adapter plugged in. However, when i unplug the adapter and run on battery, any UAC prompts for approval or hitting ctrl + alt + del to bring out the task manager will reset the brightness to max. I have tried with all the power plans and also removed the power4gear, the problem still exists. Do you have any idea on why this happens? Thanks in advance. :confused:


    EDITED: Just realized another problem that happens in concurrence with the brightness reset. When the laptop runs on battery, the UAC prompts cause a severe mouse lag (it returns to normal when the prompt is closed). This problem only happens when I first login from fresh reboot, if I log out and then log in again (on battery), the lag is gone but the brightness reset problem remains.
     
    frogman23, Jun 18, 2008
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  2. E.B.E.

    E.B.E. NBR Procrastinator

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    You can check the power profiles of Vista, see if there is anything about dimmning the LCD there.
     
    E.B.E., Jun 18, 2008
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  3. frogman23

    frogman23 Notebook Enthusiast

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    EBE, thanks for the reply. The maximum brightness in all the power plans of vista are set to 50-80%.
     
    frogman23, Jun 18, 2008
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  4. E.B.E.

    E.B.E. NBR Procrastinator

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    I really don't know, but I can take a shot in the dark... it looks related to the ACPI (power management). Have you tried upgrading or reinstalling those drivers?
     
    E.B.E., Jun 18, 2008
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  5. Oldman

    Oldman Notebook Evangelist

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    Another suggestion this is kind of warning message generated by either P4Gear or OS power management.
    May be it make sense to access config or settings to look at all these check/uncheck boxes.
    Another option to go crt-alt-del and check all these power management related processes that run automatically but this is the way with complications if you do not know exactly what you are doing
     
    Oldman, Jun 18, 2008
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  6. frogman23

    frogman23 Notebook Enthusiast

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    Interestingly, the problem was solved by updating the display driver! It seems that the 174.74 from LV2G got some conflicts with the power management. Updating to the latest 174.82 released by Asus solved the problem. Thanks for all the suggestions anyway ;)
     
    frogman23, Jun 19, 2008
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  7. E.B.E.

    E.B.E. NBR Procrastinator

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    Yeah, that's also an often occurrence (GPU driver conflicts with ACPI)... I didn't think about it when replying, sorry :)
     
    E.B.E., Jun 19, 2008
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