Intel Mac :: Sound Disabled Upon Restarting On 21.5" Running 10.7.3
Mar 21, 2012
I was wondering if anyone knows of a fix for my iMac 21.5" which seems to disable the onboard sound upon restarting?
I understand that this can be remedied by resetting the SMC but I cannot be expected to do this each and every time the machine is restarted. Is there any way I can get it to work permanently?
Upon restarting the volume icon is greyed out, and pressing the volume up/down keys bring up the volume box with a "no entry" sign underneath the icon. I've tried unplugging and replugging the external speakers to no avail, and this occurs with the internal speakers also. I've checked the correct device is selected in the volume settings and the optical output is not switched on.
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May 31, 2012
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iMac, Mac OS X (10.5.8)
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Mar 26, 2012
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Today I downloaded the MacOSXUpdCombo 10.7.4 from the apple website. I opened it up and it got to about half way through installation before a grey hue dropped down on my screen and a message appeared "Your computer needs to restart". After restarting, I got a error message saying that my computer had to shut down due to issues and to submit a bug report to apple. I decided to give it another go and the exact same thing happened
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Dec 7, 2014
I recently had to reformat my iMac because it was restarting constantly and it kept freezing too. After a reformat, I installed a few programs. Skype, Microsoft Office 2010, VLC, Plex Home Theatre, Plex Media Server, an uTorrent.
My computer restarted randomly again, twice :-( I included the crash report below if it is useful.
Anonymous UUID: D5BFA84C-1ECE-3EC9-ED1F-6392EF1A3BB8
Mon Dec 8 02:13:49 2014
*** Panic Report ***
panic(cpu 0 caller 0xffffff80040e8887): "complete() while dma active"@/SourceCache/xnu/xnu-2782.1.97/iokit/Kernel/IOMemoryDescriptor.cpp:3307
Backtrace (CPU 0), Frame : Return Address
[code].....
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Mar 5, 2012
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iMac (27-inch Mid 2010), Mac OS X (10.7.4)
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For some strange reason i don't have sound anymore on my macbook pro running snow leopard.
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Mar 13, 2008
I have the early 2008 Mac Pro, standard configuration. I run a 30" ACD and recently added a second monitor. Ever since then I have been hearing this faint whirring sound, as if something in the machine is starting/reving up and then whirring down. It's audible to me because I have my machine sitting on top of a pedestal desk right beside my table. Does running two monitors make something inside, maybe a fan, run wierd? Could it be the fan of the video card? I am just curious, as I had not heard the sound before when I was running just one monitor. Oh, and the second monitor in question is a Wacom Cintiq. Video card is the stock ATI Radeon HD 2600 XT. I dare not open the side panel when the machine is running to check what's causing it lest I mess something up. It's like, rrrrrrrrrrrrr, rrrrrrr, rrrrrrrrrrr, like a miniature reving sound. LOL, that's the best I can do to imitate the sound. It's as audible as the sound of the regular fans.
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I just noticed that the sound of my 21.5" iMac speakers kinda changes notably when I'm using Windows (BootCamp). Compared to the sound while using Snow Leopard, it sound very thin, bass-less and... just strange. More like MacBook speakers, or just small speakers. Another thing is that the headphone input doesn't work on Windows. Could these issues be related to audio drivers? I don't know much about that sort of stuff.
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