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[possible solution] Wake problem / black screen after resume/standby

a4d

Joined
Apr 13, 2012
Messages
1
Motherboard
Mountain Lion 10.8.2. on a GA-Z68X-UD3H-B3
CPU
Intel Core i5-2500K, 3600 MHz (36 x 100)
Graphics
XFX Radeon HD 6870
Mac
Classic Mac
Mobile Phone
iOS
Hi all,
just to give you a short notice what helps me out of my "can't wake" problem on my ML 10.8.2 with an Gigabyte GA-Z68X-UD3H-B3.

First of all: I think I've tried nearly everything, read - I think - the most of the topics in this forum... but nothing helps:

- different Darkwake settings
- a clean install with extra hardware (e.g. cdroms, bluray, hdd, graphic cards) or completely without
- with several boot flags for the graphic card like npci=0x3000
- with different MultiBeast settings
- Different Bios Settings (Disabled Overclocking (just modified multiplier) of my i5-2500k, disabled Memory XMP profiles, different Powermanagement settings...)
and much more

And the I tried to disable specific default options in the bios and here is the root caus of my personal evil :)
CMOS Setup -> Advanced Frequency Settings -> BCLK/DMI/PEG Clock Control = Enabled

When I DISABLE the setting, everything works perfectly. When I enable it, ML resumes but the screen stays black and the OS is not reachable via ssh or whatever.
Maybe this is helpfull for some people whose ML won't wake up correctly.
 

Attachments

Joined
Jun 28, 2012
Messages
207
Motherboard
Asus Z97i-itx
Graphics
GTX 970 - 4GB
Mac
MacBook Air, Mac mini
Mobile Phone
iOS
Hi all,
just to give you a short notice what helps me out of my "can't wake" problem on my ML 10.8.2 with an Gigabyte GA-Z68X-UD3H-B3.

First of all: I think I've tried nearly everything, read - I think - the most of the topics in this forum... but nothing helps:

- different Darkwake settings
- a clean install with extra hardware (e.g. cdroms, bluray, hdd, graphic cards) or completely without
- with several boot flags for the graphic card like npci=0x3000
- with different MultiBeast settings
- Different Bios Settings (Disabled Overclocking (just modified multiplier) of my i5-2500k, disabled Memory XMP profiles, different Powermanagement settings...)
and much more

And the I tried to disable specific default options in the bios and here is the root caus of my personal evil :)
CMOS Setup -> Advanced Frequency Settings -> BCLK/DMI/PEG Clock Control = Enabled

When I DISABLE the setting, everything works perfectly. When I enable it, ML resumes but the screen stays black and the OS is not reachable via ssh or whatever.
Maybe this is helpfull for some people whose ML won't wake up correctly.
Do a test for me. With it in the 'broken' state, put the computer to sleep. Wake it up and be patient. See if the screen turns on after 1-2 minutes.

I had a simliar issue and it turned out a simple DSDT fix is all I needed.
 
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