Yosemite 10.10.5 Sleep Bug?

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Level 1

105 points

Yosemite 10.10.5 Sleep Bug?

I've had a repeatable bug pop up the past several weeks that I hadn't seen a few months ago.

If my Mid-2012 Mac Pro goes to sleep on it;s own under energy saver, or I put it to sleep for an extranded time, It will go to black. But when I try to wake it up...the screen is all "hash", nothing there, and the keyboard won;t wake it up and the computer is not responding to any wake uo commands.

I have to physically press the power button until it turns off completely and then restart it.

It starts up with the warning it wasn't shut down properly and takes a while to reboot.

What's going on, why does it become non-responsive and why is the screen filled with "static/hash" and no image?

If I put it to sleep and wake it up after a few minutes it seems fine.

Maybe it's a bug with sleep and hard drive shut down after a few minutes of inactivity?

But under energy saving power settings I have "never" checked off for computer sleep and display sleep, but do have "put hardisks to sleep whenever possible " checked off.

Ideas...suggestions??

Mac Pro, OS X Yosemite (10.10), 20 Gig Ram, 3.5 GigHD's Bluetooth/A

Posted on May 7, 2016 11:55 AM

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Answer 1

theratter

Level 4

3,961 points

May 7, 2016 12:48 PM in response to drshame

If you have a 15" model then see this: 2011 MacBook Pro Repair Extension Program for Video Issues.

If your model does not meet the requirements of the above, then you might consider that it is a software problem. The best way to test this is to install a fresh copy of OS X on another disk. Boot from and use this copy for a short period of time testing if it shows any sleep/wake issues. If it does not then you may have a problem with your third-party software. You can install them one at a time and test each one before installing another.

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Answer 2

drshame Author

Level 1

105 points

May 7, 2016 12:58 PM in response to theratter

Suggestion appreciated.

Mac Pro Tower, Mid 2012m not a Mac Book.

Video feeding into a Samsung SMB 2330H with no problem until a few weeks ago.

What'd I do between then and now?

Allowed several new "security updates" for 10.10.5 and did "tinker" with display and energy settings to give the hardrives some rest between actual uses.

Main Boot drive is a Crucial SSD which has been stable.

May consider turning off all energy saving /sleep settings and do it manually to see if it fixes the bug.

I've found tracking these glitches takes more time, risks crashing the entire system, more than living with it or trying to minimize the issue by other means: Like leaving it all on, or turning off the monitor power switch when I'm leaving it alone for a while.

Sometimes low tech works the best.

Which I assume, is why the on-off switch remains on everything.

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Answer 3

theratter

Level 4

3,961 points

May 7, 2016 1:19 PM in response to drshame

My apologies. Then I would suggest that the GPU may be the cause of the issue. Again, a freshly installed OS X on another drive is the best way to determine if the problem is software or hardware. Even faulty memory could cause such problems. Don't rely on memory testing software because they often miss problems more than they find them unless you can run them for hours or days.

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