Do you experience any choppiness on your MBP?

Discussion in 'MacBook Pro' started by ZballZ, Nov 25, 2006.

  1. ZballZ macrumors regular

    Nov 11, 2006
    Some people have reported choppiness issues with dashboard and expose when unplugged - what is the general idea about this?

    I dont have any choppiness on dahsboard or expose - but I noticed that iDVD has choppiness when playing some of the "themes" - especially the BLACK/WHITE REFLECTION theme - even with the AC plugged in.

    Could anyone confirm if this is "normal"?
  2. projectle macrumors 6502

    Oct 11, 2005
    The choppiness is an issue with the default Power Profiles, which say that when running off of battery power, underclock a bunch of stuff and start turning off unnecissary components when not in use (like hard disk when not accessed, DVD drive when there is nothing in it, etc.)

    The problem there is that it takes a moment for EFI to realize that "oh, I am starting to use a ton of resources, I better go back up to the normal clock speed."

    When doing something like opening Photoshop or starting to do a video project, this should not be seen, but when doing something like a quick CoreImage effect like you see on Expose or Dashboard, then you run into a problem as it can not get the resources up fast enough.

    There has been some talk in the Apple Forums that in the mean time, you can resolve the issue by going into System Preferences -> Energy Saver -> Battery and turn off "Put Hard Disk(s) to sleep when possible" and set Optimization to "Performance". Apparently, this is also going to be addressed in the next OS Update.

    No info on how they are going to fix it, but as a developer myself, what I would do when calling Expose or any other CoreAnimation program, I would first make a call to EFI returning the clockspeeds to their default settings and then run it rather than just rely on EFI trying to think for me... But then, to each his own.
  3. ZballZ thread starter macrumors regular

    Nov 11, 2006
    THX. very elaborate answer !

    So I plugged in, and everything should be at top speed I guess. The choppiness is still there.

    Could be nice with a one-on-one comparison, so if anyone could open iDVD, and simply play the "black reflection"-theme, and see if there is any choppiness - would be appreciated.
  4. daneoni macrumors G4


    Mar 24, 2006
    I dunno, i guess i have choppiness but mine seems like a pattern. The slides *jerks* like every 2 seconds continuously, making me think its actually part of the theme as there is no irregularity.

    However when i start playing the theme, there is a long 4 second jerk and things the pattern jerking ensues.

    Dashboard and everything is fine for me.
  5. gekko513 macrumors 603


    Oct 16, 2003
    I can only guess that the iDVD themes are quite resource intensive and that's the reason why there's some jerkiness when you preview and playback. However, I'm thinking this shouldn't affect the product after it's been rendered to the DVD.
  6. dpope macrumors member

    Sep 5, 2006
    Its slightly jerky for me but given that this is one of the first non-rossetta apps that seems to have taxed the machine at all in the 3 days I've owned it I'd just assume this is because the themes are resource intensive and not that there's anything wrong with your machine.
  7. kerisimasi macrumors member

    Jul 1, 2006
    expose issues

    thanks for the explanation - I was actually going to go into an apple store and see what their MBPs were far as expose on battery power. I haven't been able to solve the choppiness - the difference b/w expose on battery power and on AC power is very drastic. Do you know of any other "fixes"?

    Also, to the OP....I have choppy iDVD themes as well....regardless of power adapter connected or not. This just seems odd to me seeing as it is a brand new C2D 2.16GHz MBP. Maybe my expectations were too high....even though it seemed as if my macbook was quicker and ran everything smoother. thanks for you help
  8. SC68Cal macrumors 68000

    Feb 23, 2006
    The only thing I can comment on is the iDVD, because those effects seem to be rendered on the fly, so I'm not surprised that there is a framerate drop.

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