tttxx
Level 1 (10 points)

Q: Sound stuttering after Mountain Lion install

Dear community,

 

after having installed OSX Mountain Lion my sound startet stuttering whenever there is rapid movement on my screen.

This includes e.g. window movement, scrolling through image loaded websites or video playback (flash player, quicktime).

A restart didn't help. I'm using stereo output, not digital.

 

I have connected a second monitor but the problem persists after disconnecting it. Movement on the second monitor also causes the sound to stutter.

My GPU Diode temperature is at 85°C (there is some bug that keeps the GPU under load while a second monitor is connected AFAIK), but I guess it was the same under Snow Leopard.

 

In Snow Leopard the sound output was always perfect even under heavy load or heavy HDD I/O.

 

Any ideas?

iMac (27-inch Mid 2011), OS X Mountain Lion

Posted on Jul 28, 2012 5:55 AM

by Studio Engineer,Solvedanswer
Studio Engineer Studio Engineer
Level 2 (445 points)
A:

deluxeczech wrote:

 

I, too, am having this sound stuttering problem...and it all started after I upgraded to 10.8.  :-(    I have a 27" 3.1 GHz Intel Core i5 with 16GB of memory.  (My husband has an older 2009 model of the 27" and he is having the sound stuttering problem since ML too).  I can promise you that we had no such problems before upgrading, and are not ones to constantly install new software/games/etc.  We do both play World of Warcraft but have done so for a few years on our various Macs.  We don't listen to music or watch videos much on our desktops, so I cannot speak to other sound problems, but when playing WoW and using Ventrilo, there are occasional stuttering instances.  It is not very consistent (that is, always does it during X or Z).  In fact, using Ventrilo tonight and had no problems, but a week ago experienced stuttering when someone else was talking. 

 

I do wish Apple would AT LEAST release a statement acknowledging this issue.  We both work in IT development, so we understand that there are sometimes mystery problems that take time to troubleshoot.  NOT saying anything, however, just makes the company seem uncaring of its customers.  Personally, I would be a bit more content if I KNEW that Apple KNEW and that they were looking into it.

 

While not an ideal situation, it's good to know we are not alone in this...

 

 

Your problems will most likely be related to OS X "sandboxing" just about anything you do.... Sandboxing was supposed to be a "coherent" feature. But wound up being a total performance killa... Apple have been working on this issue a LONG time since 10.8.2.... hence them releasing more betas of 10.8.3 than (I think) any other beta OS X before that... A HUGE problem causing havoc with almost ALL 3rd pty. high performance software..

 

If you are a CRACK... You can google-search (goes beyond this here thread) ways of "overwriting" what OS X regards as "Items/processes which should be sandboxd"... To STOP this non sense...

 

We had to manually delete A LOT of files on the OS to get our system running to accommodate a pro-environment. Even "Files" that Apple forgot to delete themselves.......(Do the G-search or this thread WILL be deleted... hence me NOT going into details)

 

What COULD help you is to safe-boot ONCE and log in.. Then boot normally.. That in MANY cases will take of the problems (short-sighted-ly)... Each time you re-experience the issue... Redo aboe

 

IHTH

Posted on Mar 9, 2013 8:15 PM

Close
tttxx

Q: Sound stuttering after Mountain Lion install

  • All replies
  • Helpful answers

first Previous Page 25 of 82 last Next

  • by FrederikY,

    FrederikY FrederikY Sep 24, 2012 5:09 AM in response to LouFace
    Level 1 (0 points)
    Sep 24, 2012 5:09 AM in response to LouFace

    Well, my iMac is 9 month old -> Apple Care?

  • by Victor In Munich,

    Victor In Munich Victor In Munich Sep 24, 2012 5:45 AM in response to FrederikY
    Level 2 (151 points)
    Mac OS X
    Sep 24, 2012 5:45 AM in response to FrederikY

    Yes definatly contact applecare. the more that do, the better for everyone. I suggest that if you can, make an open mic recording of the issue first (use the voice memo function) and then you can tell them you have a sample to send them. There isnt actually a sound card that can be exchanged, it would be the whole logic board.

     

    I spoke to a guy called Lukas and he passed my recording onto the engineers.

     

    Use this link (I think your in Germany) and select Erste Schritte http://www.apple.com/de/support/contact/

     

    mfg

     

    Victor

  • by FrederikY,

    FrederikY FrederikY Sep 24, 2012 5:49 AM in response to Victor In Munich
    Level 1 (0 points)
    Sep 24, 2012 5:49 AM in response to Victor In Munich

    OK, thanks I'll try that.

  • by FrederikY,

    FrederikY FrederikY Sep 24, 2012 6:19 AM in response to tttxx
    Level 1 (0 points)
    Sep 24, 2012 6:19 AM in response to tttxx

    I talked to Apple care now, sent him this video (I think the video is representative): http://www.youtube.com/watch?v=6Sm9fkx-hTk

    …and he will call back after he watched the video

  • by FrederikY,

    FrederikY FrederikY Sep 24, 2012 6:42 AM in response to FrederikY
    Level 1 (0 points)
    Sep 24, 2012 6:42 AM in response to FrederikY

    Result: He will send me a diagnostic tool which loggs the whole system while I reproduce the sound stuttering: For the engeneers to decide if this is a hardware problem or a software problem (we know the answer).

  • by LouFace,

    LouFace LouFace Sep 24, 2012 7:10 AM in response to FrederikY
    Level 1 (0 points)
    Sep 24, 2012 7:10 AM in response to FrederikY

    It infuriates me the way they try to dance around the fact that it's their new software that has ballsed everything up. All our different model/age/type of computers just happened to aquire the same problem at completely different times, where installing Mountain Lion was just a coincidence?

  • by tttxx,

    tttxx tttxx Sep 24, 2012 7:37 AM in response to LouFace
    Level 1 (10 points)
    Sep 24, 2012 7:37 AM in response to LouFace

    After a few days using 10.8.2 I can't reproduce the problem anymore.

     

    With 10.8.0 I had the stuttering whenever I just scrolled through websites with Safari. The GPU diode temp was at 85°C all the time.

    After the 10.8.1 update the issues still occured when for example watching a clip from myspass.de and listening to iTunes music at the same time. It was much less frequently though and difficult to reproduce.

    Since the last update I haven't had this issue anymore and the GPU diode temp is below 65°C in idle mode. Even when playing Diablo3 for some minutes the mouse lags don't occur anymore and the music plays 100%. And one can definitely tell the difference between a game lag (10.7) and a mouse input lag/glitch (<=10.8.1).

     

    So what has changed? Was ist a gfx driver issue and the freezes were a consequence of gpu throttling due to high temperatures?

    Can anyone share a way to reproduce the problem with 10.8.2 on a stock iMac with internet access?

  • by Victor In Munich,

    Victor In Munich Victor In Munich Sep 24, 2012 8:51 AM in response to tttxx
    Level 2 (151 points)
    Mac OS X
    Sep 24, 2012 8:51 AM in response to tttxx

    Glad 10.8.2 solved you issues. For me it didn't.

    How to reproduce? Boot computer to mountain lion. A fresh install will do. Play any media. iTunes QuickTime Internet radio online games. Sound will break up anytime between 1 minute and 3 hours later.

  • by tttxx,

    tttxx tttxx Sep 24, 2012 8:57 AM in response to Victor In Munich
    Level 1 (10 points)
    Sep 24, 2012 8:57 AM in response to Victor In Munich

    Could you check your GPU temperature when this happens? I used iStat for the dashboard to get the numbers...

    Does the coreaudiod process jump to 10% CPU usage? (filter to "All processes" in the activity monitor)

    I'm still interested because I don't trust the silence yet.

  • by FrederikY,

    FrederikY FrederikY Sep 24, 2012 9:30 AM in response to tttxx
    Level 1 (0 points)
    Sep 24, 2012 9:30 AM in response to tttxx

    My iMac became a lot cooler after 10.8.2, too.

    But the stuttering still exists

  • by LouFace,

    LouFace LouFace Sep 24, 2012 9:44 AM in response to tttxx
    Level 1 (0 points)
    Sep 24, 2012 9:44 AM in response to tttxx

    Upgrading to 10.8.2 is what caused my stuttering

  • by FrederikY,

    FrederikY FrederikY Sep 24, 2012 10:01 AM in response to LouFace
    Level 1 (0 points)
    Sep 24, 2012 10:01 AM in response to LouFace

    Reinstall Mountain Lion, and don't install the update!

  • by LouFace,

    LouFace LouFace Sep 24, 2012 10:10 AM in response to FrederikY
    Level 1 (0 points)
    Sep 24, 2012 10:10 AM in response to FrederikY

    Update? I only have the 10.8.2 Mountian Lion. I installed it directly from the Apple website. Went from Snow Leapord to Mountain Lion 10.8.2.

  • by FrederikY,

    FrederikY FrederikY Sep 24, 2012 10:29 AM in response to LouFace
    Level 1 (0 points)
    Sep 24, 2012 10:29 AM in response to LouFace

    ok, I see. I thought you had 10.8.0 without problems…and then installed the 10.8.2 update.

    Put so you'll probably have the same stuttering in 10.8.0.

  • by Jazzman,

    Jazzman Jazzman Sep 25, 2012 6:39 AM in response to FrederikY
    Level 2 (160 points)
    Sep 25, 2012 6:39 AM in response to FrederikY

    I've found the same thing. 10.8.2 did me in. I'm calling the Apple Care line today. I don't know if they have a fix yet or not, but I want to log my issue. I've got a late 2010 27" iMac. Listening to music via a high end headphone system is pure agony with this stuttering and occasional crackle sound. This happens with an AIFF (external HD) library as well as an ACC library (stock Apple internal HD). It even happens when I stream music via MOG.

     

    I'm going to have to go back to CD's via a CD player until this gets fixed.

first Previous Page 25 of 82 last Next