Q: Multiple Montiors Fail after Wake from Sleep . . .
Throughout the years with OSX 10.x there has been issues with monitors that have popped up that could easily be fixed with clicking on the “Detect Displays” button. That button is gone and so is any easy way of fixing results of any bug. Over the past couple of weeks issues about monitors are happening at every wake from sleep. I am running several OS’s and restarting in another that has more stability where there is no issue, then rebooting back to 10.10.5 the monitors “usually” snap into “proper” resolution. Most of the time. On average I have to spend 1-2 hours per happening trying to resolve this. Recently, shutting down the machine, waiting awhile, then restarting will put everything as it should be. Most of the time.
Problem: At initial, first time of the day startup all monitors (2) are in proper position, resolution and appearance. Then after anytime during the day if the machine goes to sleep, after waking from sleep either the main monitor will not wake and the system goes into one monitor mode with the secondary monitor as main and primary; or the main monitor will come up as it should, but the secondary monitor goes into the wrong resolution with no proper resolution listing or no selection at all in the control panel. Swapping plugs on the graphics card does not really do anything. This has become a multiple time a day issue.
Hardware Specs:
Model Name: Mac Pro
Model Identifier: MacPro3,1
Processor Name: Quad-Core Intel Xeon
Processor Speed: 2.8 GHz
Number of Processors: 2
Total Number of Cores: 8
L2 Cache (per Processor): 12 MB
Memory: 8 GB
Bus Speed: 1.6 GHz
Boot ROM Version: MP31.006C.B05
SMC Version (system): 1.25f4
ATI Radeon HD 2600 XT:
Chipset Model: ATI Radeon HD 2600
Type: GPU
Bus: PCIe
Slot: Slot-1
PCIe Lane Width: x16
VRAM (Total): 256 MB
Vendor: ATI (0x1002)
Device ID: 0x9588
Revision ID: 0x0000
ROM Revision: 113-B1480A-252
EFI Driver Version: 01.00.252
Displays:
Samsung S22B150 (Secondary):
Resolution: 1920 x 1080 @ 60 Hz
Pixel Depth: 32-Bit Color (ARGB8888)
Mirror: Off
Online: Yes
Rotation: Supported
Samsung SyncMaster 2220WM (Primary):
Resolution: 1680 x 1050 @ 60 Hz
Pixel Depth: 32-Bit Color (ARGB8888)
Main Display: Yes
Mirror: Off
Online: Yes
Rotation: Supported
Posted on Jun 2, 2016 1:47 PM
