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First issue with my new 21.5" iMac

S

SidZer0

macrumors newbie
Original poster
Sep 6, 2012
8
0
So I'm running a dual monitor setup with my new iMac, the 2nd monitor is a fairly new LG E2241 connected with a Mini DVI to HDMI cable via the Thunderbolt port. Here's the issue, everytime I go to "wake up" the system after a prolonged sleep period the iMac starts starts up fine but the 2nd monitor remains in sleep mode as if it wasn't even connected. The iMac actually reverts back to a single screen setup too. The only way to get it to wake up its to disconnect and reconnect from the TB port. I could turn off the sleep feature but I really don't think that's a good idea, so my work around is turning off the iMac between long periods of use.

Is anyone else having this issue with their dual monitor setups? If so were you able to fix it or know if this issue will be resolved with an update or patch?

FYI, I never had this problem with my mid 2010 MBP connected to this same monitor for over a year. So I'm suspecting this is a TB issue.

Thanks in advance.
 
Last edited:
Are you on 10.8.2, if so that might be the problem, plenty of sleep issues, if so try this, set the Mac to never sleep and manually put it to sleep, if this helps you can set it back but need to set the standby and autopoweroff to 0 in pmset

to do so enter in terminal:

sudo pmset autopoweroff 0
enter
enter password
sudo pmset standby 0
enter
If asked for password enter it again.

But, before you do first enter pmset -g, it will show you the current values, after you do the above commands enter pmset -g again and compare with first ones.
 
So what exactly will those commands change if the iMac is already in "never sleep" mode? Sorry, I'm not that proficient with terminal.
 
Last edited:
justperry said:
Power Management settings, if it does not work you can easily revert by changing 0 to one or 1 to zero, no damage done.
Click to expand...

Should I run those settings with the display sleep enabled or disabled?
 
SidZer0 said:
Should I run those settings with the display sleep enabled or disabled?
Click to expand...

These are my settings and since I set them to these the Mini does not have sleep problems.
Also, read Macman45's link, I think I got this from him or his link. before.

standby 0
powerbutton 1
womp 0
autorestart 1
hibernatefile /var/vm/sleepimage
networkoversleep 0
disksleep 10
sleep 0
autopoweroffdelay 14400
hibernatemode 0
autopoweroff 0
ttyskeepawake 1
displaysleep 10 (display sleep prevented by )
standbydelay 4200
 
These are my settings now and it has seemed to have worked. :D

standby 0
powerbutton 1
womp 1
halfdim 1
hibernatefile /var/vm/sleepimage
autorestart 0
networkoversleep 0
disksleep 10
sleep 120
autopoweroffdelay 14400
hibernatemode 3
autopoweroff 0
ttyskeepawake 1
displaysleep 30
standbydelay 4200

Thank you.
 
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