Not sure if the issue be solved(Because I sent my TBD back for exchange), but 10.8.1 causes another problem here.
Yesterday, I was not able to get connected with the projector, while doing a presentation at a client site and plugging into the client's meeting room projector via Apple's adapter(DP-VGA).
Today, I was not able to get normal display on TH-42PHD7 Plasma TV at home, and no response while pressing any button on OSX 10.8.1.
However, I am sure the display on my Plasma TV was normal, while I played PPTV on OSX 10.8.
I suspect Apple creates another fatal bug, while trying to fix the audio issue on Thunderdisplay.
Disappoint me again!!
I've had this problem with both Lion and Mountain Lion (which introduces new troubles, like kernel tasks that grab 100% of a core forever). The problem is this: if I am doing disk I/O at any appreciatable rate (including SSD IO) then audio through the Thunderbolt display crackles and withers away to nothing in a couple of minutes. As a computer scientist, it seem to me like a buffering problem. It is as though audio packets coming over the USB on the Thunderbolt detector are lost in favor of disk/SSD IO. But it's 10Gb/s connection! The traffic to the disk does not have to be heavy, perhaps 10Mb/s is enough.
This has happened on my old MBP, and on my fancy new retina MBP. It is 100% reproducible. At one time I thought it was my Promise RAID array, but no: it happens even when there is zero activity to that array. It is happening now as I back up over the Thunderbolt Ethernet to a new Time Capsule.
I have had this same problem. First I replaced the Display with a new one. Same problem. Then I replaced my new MBA 13" i5 8GB with a new 11"i7 8GB. Same problem. I have now updated to 10.8.2, same dang problem, though now I can get up to 30 minutes of music/skype before I am overwhlemed with Static/fried sounds from the display speakers.
As other have noted, any resetting of audio outputs through the cotrol panel resets the clock, but the static returns.
The other problem that I have been having with the MBA and TBD is the MBA freezing and requiring a forced restart about 75% of the time when it is connected to the display.
The MBA is working fine. I will close it, and connect it to the displays' TB cable/mag2. The display will not come on, and when I disconnect to try and use the MBA alone, it is frozen dark screen and unresponsive, though getting hot as the battery is still running. It requires a hard reset to come back.
This is maddening that apple has not fixed or ackowledged this!
Ha anbody else had this freezing problem or just he static audio problem? Again, this problem has persisted across 2 displays and 2 different MBA/processor combos...
Model Name: MacBook Air
Model Identifier: MacBookAir5,1
Processor Name: Intel Core i7
Processor Speed: 2 GHz
L2 Cache (per Core): 256 KB
L3 Cache: 4 MB
Memory: 8 GB
Boot ROM Version: MBA51.00EF.B01
SMC Version (system): 2.4f17
Vendor ID: 0x1
Device ID: 0x8002
Device Revision: 0x1
Firmware Version: 22.2
Help me Apppppple!
I'm having the same issue of degrading audio to static on my new 27'' thunderbolt display using my 2011 Macbook Pro 17''
17-inch, Early 2011
Processor 2.3 GHz Intel Core i7
Memory 16 GB 1333 MHz DDR3
Graphics AMD Radeon HD 6750M 1024 MB
Software Mac OS X Lion 10.7.5 (11G63)
Apple Thunderbolt Display
2560 x 1440
Model Name: MacBook Pro Model Identifier: MacBookPro8,3 Processor Name: Intel Core i7 Processor Speed: 2.3 GHz Number of Processors: 1 Total Number of Cores: 4 L2 Cache (per Core): 256 KB L3 Cache: 8 MB Memory: 16 GB Boot ROM Version: MBP81.0047.B27 SMC Version (system): 1.70f5
Same issue. Just purchased brand new 27" thunderbolt display and Mac Mini w/ Mac OS X 10.8.2. Sounds like it doesn't matter what computer you attach to this monitor. Unplugging all the USB stuff from monitor didn't fix until I unplugged thunderbolt cable and plugged back in. Now sound doesn't have static. I'm going to try just using Mac Mini USB and leave the monitor's USB ports empty.
Should I try exchanging monitor? I'm still within my 14 days.
Here is a video demostrating the problem by playing 2 different tone signals using iTunes. The lower tone is used at first which really shows how bad the problem is...
Same here. I did try booting up my MacBook Pro 15-inch, Late 2011 running OS X 10.8.2 with only the Thunderbolt and power attached and that seemed to cure the issue, for last night at least. FW drives and USB hub were attached directly to the respective ports on the MBP. I will report back with an update later in the week.
Macbook Pro Retina here with the same issue to 27 in thunderbold display. Thinking it was the display I hauled it in 3 times to get the speakers fixed and finally they replaced it only to find out it appears to be the macbook or connection issue. Swapping the output to internal and then back to the thunderbolt display temporarily fixes it but the issue always comes back.
I have been having this issue for almost a year. I had gotten so used to not using audio/video to prevent it, I forgot about it until recently trying to use skype video chat.
I am on 10.8.3 and it hasn't fixed it. I am on a 2012 MBA and TBD, both new that were replaced when the issue was first discovered by me, but even having an all new system didn't change anything.
It is very troubling to hear that it's happening with a macbook pro retina now. I was hoping that when I upgraded that it would be solved.
The thing is, as a computer scientist, I can see what must be the cause of the problem. But I don't have source code, so I cannot prove it (or fix it). The issue is competition for buffer space, and the USB loses.
Apple USB and Bluetooth support for the Mac has always been bad. Considering the large number of devices, you'd think that they'd make that a priority.
I had not included USB into my testing. From what I could tell, it had to do with video stress and audio, since I first discovered it by playing Diablo 3 when it was new. Since then, any game or movie/video that runs lots of cpu brings on the problem.
I do have my mouse and keyboard plugged in to the USB of the monitor. But when troubleshooting this before, an electrical engineer said this:
"Sean, thanks for posting that followup. My suspicion was correct, i.e., there is an interaction between the PICE bus running at 2.5Ghz and WiFi in the 2.4Ghz band. I was a systems engineer in the PC industry when PCIE first came out, and we had to use excessive shielding in laptops to reduce the interference. I always thought this would be the Achilles heel of Thunderbolt. It would be interesting if you could operate WiFi at 5Ghz only and see if you have the same problem.
Note: PCIe bus: 100Mhz x 25 = 2.5Ghz (PCIe 1.1 spec)."
here's the thread: http://forums.macrumors.com/showthread.php?t=1402118
I had never bothered trying wrapping the thunderbolt cable in tinfoil or copper shielding, but maybe it is time to try.
But, how would I test this with the interaction of USB as well?
Issue persists as of July 2013. Running Air, OS X 10.8.4 and Thunderbolt display with connected peripherals (keyboard, mouse, printer). Steps to replicate reliably:
1. Start Skype > Preferences > Audio/Video to see the camera. Start a music source (Spotify in my case). Drag the preference pane to Tunderbolt to see the video. Leave on.
2. Admire yourself in the camera. Pretend to type and listen to the music for 3-5 minutes.
Symptoms: Audio slowly degrades with static, disappearing alltogether. The usb keyboard disconnects.
100% replication rate on my system