Monitor wake from sleep help

[dca693]

OK, I'll say at the start that my computer is a Hackintosh, but I'm pretty sure it's not the root cause of the issue (at least I hope not).

Here are the facts: the computer was built about 2 yrs ago. In that time, when I put my computer to sleep, it would have no issues waking up. Very rarely (like 5 times in 2 years) the monitor would apparently not wake from sleep along with the rest of the computer. On those occasions, if I fully shut the computer and powered back up, the monitor would be fine. The monitor was plugged into a battery-backed up power plug on a UPS.

Starting a few months ago, the monitor would regularly not wake up with the rest of the computer. No hardware configurations had changed. I swapped out the computer for a totally different machine. It worked fine for a few months, then it showed the same symptoms as the first computer. Thinking my UPS was bad, I got a new one. Same symptoms.

In desperation, and after having tried multiple other remedies, I plugged the monitor power plug into a non-battery-backed up plug on the new UPS. BINGO. Wake from sleep with no issues 100% of the time.

Until a month ago, when the monitor now is no longer waking properly from sleep. I've now got it plugged directly into a wall outlet, but it only works mostly.

Anybody have any ideas? I am assuming the incidents are all related. The monitor is always plugged into the computer using the DVI port. When the monitor does not wake on DVI, I can plug into another computer using VGA and the monitor works fine. (By the way, I did attempt to connect the original computer using a VGA cable, and that produced the same result - failure to wake.) The only common item in all this is the monitor, but why would it work for a while, then stop working?

Thanks in advance.

 

[C1]

Not as familiar with MACs, but recommend investigating ALL power settings:

- Start with power/display management settings in BIOS
- Next check power settings in OS (power options) for display
- Also, go into the graphics control panel setting as sometimes there are display setting options for display there too
- Finally, go thru the monitor's menu system inspecting for power settings.


Like for sound, there can be over lapping controls which duel each other. In a PC, three levels of competing (or in series) controls for sound is not uncommon (1- The OS's controls; eg, Mixer, 2- The Sound Card's control panel software; eg, SB panel and 3- The Application being used to play the sound; eg, Power DvD's volume control).

I also have cases where power timeout settings for display change on their own from time-to-time and which to date I still havent figured out the cause mechanism/chain.

 

[dca693]

Not as familiar with MACs, but recommend investigating ALL power settings:

- Start with power/display management settings in BIOS
- Next check power settings in OS (power options) for display
- Also, go into the graphics control panel setting as sometimes there are display setting options for display there too
- Finally, go thru the monitor's menu system inspecting for power settings.


Like for sound, there can be over lapping controls which duel each other. In a PC, three levels of competing (or in series) controls for sound is not uncommon (1- The OS's controls; eg, Mixer, 2- The Sound Card's control panel software; eg, SB panel and 3- The Application being used to play the sound; eg, Power DvD's volume control).

I also have cases where power timeout settings for display change on their own from time-to-time and which to date I still havent figured out the cause mechanism/chain.

Thanks C1. I will double-check all settings tonight. I didn't purposefully make any systems changes, but as you say, sometimes these things duel each other and perhaps an OS update did something funky.