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This seems to be a known issue that Apple is aware of but has not made a permanent fix
https://discussions.apple.com/thread/3669283?start=0&tstart=0 <click link
This is what I am reading up on with many others having the same symptoms as yourself
Looks like a bunch of temp fixes to the problem but I have not come across the permanent fix yet but still have to read the last page of this thread
Are you getting any display and no sound or both?
Yes, it seems to be the same problem, I will try the suggested solution.
I will stand by while you try and see if you can get this going
It does not work!
which solution did you try
(the shift control option power)
. Shut Down your laptop
2. Unplug Display(both power and thunderbolt connection) for 15 sec or so
3. Press & Release Shift+Control+Option+Power
4. Wait for 15 sec or so
5. Plug back display and power
Try unplugging the power from the monitor only. Wait a minute then plug the power back in to the monitor. Keep the Mac on through this process
It does work
Let me just try to put it to sleep and see if that works too.
So, if the laptop goes to sleep, it doesn't work when it wakes.
Does that mean I have to unplug for one minute each time?
It sounds like it
It is a problem that Apple never made a solution for
You have done all your updates correct?
I have. And isn't it odd that it took one year for that problem to show up?
I would have to agree with you. I think it has to do with Sleep mode and the USB ports not sending out a signal to re detect what is plugged in
Let me see if I can come up with more solutions
Are you using the same port you have always used with the TB display?
Have you added any other devices since then?
Is it a TBD problem or a laptop problem?n
I have Lion on my laptop (latest version)
And your connecting the TB straight to the laptop correct? No USB hubs or etc
My logical answer is for some reason when the computer wakes back up it is not detecting what is connected via USB. So when we turn the power off the TB display for a minute then plug it in then it tells the USB port hay I am here.
By USB do you mean TB of am I missing something?
no the port the TB is plugged in to on your computer
Here is an Idea
and I want you to test it and see if it works. It will also go with our theory
Before closing the laptop to go to sleep how about unplugging the TB display from the computer
put the computer to sleep
wake the computer up
plug the TB display back in to the laptop
see if it works
Yes, it works!
That is a little faster to deal with the problem then
for some reason the TB is not being detected on wake up
after reading a lot of threads on this same issue most people have exchanged their TB display for a new one
then the problem would go away
I noticed that people had their logic boards replaced but the problem still was there.
So by reading threads they blame the TB
I am sure your TB is not under warranty any more correct?
It's been more than a year and I didn't take any special guarantee.
sometimes if it is not to long past the year they might extend the warranty
Like in the 13 or 14 month
I am reading this thread now.
It looks like the macbook pro fix for this came in 10.8.1
but I am still reading where people had to replace the TB to fix the issue
so it is a toss up
here is a try
Click the "Apple" menu and click the "System Preferences" entry in the list. Click the "Energy Saver" option. Slide the "Display Sleep" switch to the amount of minutes you want the computer to wait before putting the computer to sleep. Drag the "Computer Sleep" slider to the "Never" position.
but this will tell your computer to not sleep
but if you close your lid the display should go blank
I know I can only give you work arounds for this. There is no true fix other than trying a different TB display which in most threads I have read was the only true fix
So the computer will never go to sleep, will the display go to sleep?
You will have to test it.
The only thing I was trying was to keep the ports that the TB display is plugged in to active instead of them going to sleep
Change the power settings like above then close your lid and see what happens
The AppleCare Protection Plan can be purchased only while your Apple Display is still covered under the standard one-year limited warranty
Ok, I am not sure what the word lid means. But I have put the screen of my laptop in contact with the keyboard, and the TB display went blank, then it went to life with the resolution 1280 * 720 (my laptop's resolution). However, the audio kept working.
so that is out of the question. I just looked that up on the apple website
so the TB stayed active which defeats the purpose of sleep
So your options are go with this setting or unplug the TB before putting the laptop to sleep. Then wake the computer and plug back in the TB
I have one last idea on this
First put your power options back to normal the way they was
Shutdown the computer
unplug the power adapter
Take out the battery
hold the power on button for a minute
this will drain all power out of the unit
then put the battery back in and plug the power adapter back in
Turn on the computer
Then test the sleep function with the TB display as before and see if this makes it go back to the original way
Dont do the unplug TB from computer keep it plugged in and see if it wakes up when the computer wakes up
My goal is to reset the Power Management Chip
How do I take out the battery?
On the underside of the laptop do you see where you can eject the battery
or is yours built in
I just looked it up and yours is built in sorry
At this point it seems the best is to just unplug the TB before putting the computer to sleep
then wake it up and plug in the TB
Even with the "never let the computer sleep", it seems whenever the display goes to sleep, the problem shows up.
so it seems to point more towards the TB display then the port on the laptop
trying again to make sure.
http://support.apple.com/kb/DL1453 Thunderbolt Display firmware update 1.1
Ok, it seems that as long as music is playing while the TB display goes blank, there is no problem
the music is probably keeping the port alive
it is when the port goes to sleep that the TB is not say hay I am here when the computer wakes back up
I wonder if the firmware update might fix this issue
I am pretty sure I have already applied it, but let me try.
Yep, the installer told me "your display does not need this update
Well I am out of idea's as a permanent fix
I can only give you the work around fix for it
does the computer go to sleep while music is playing?
Not until the music is done playing
and inactivity after a certain time
Ok, does it work even when the sound level is zero?
I would say if the music is playing and the sound level is zero then it should stay active
Ok, I think I can live with that.
I am sorry we could not come up with a total fix. This one is in Apples court to come up with a fix
At least we have a few work arounds though
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Alright. Thank you for your help.