Mac won't wake up after sleep

When I leave my macbook pro unattended for a whie and come back to use it, the screen is dark (per screen saver) but I just can't wake it up. I have moved my fingers across the trackpad and pressed keyboard keys without any success. Every time, I need to restart Mac OS Lion.

expanding on my post yesterday it appears that ML puts the whole system into a deep sleep: when I returned to system this morning all was silent, no fans running, no disks turning. After pressing power button briefly, iMac woke up but wireless KB and trackpad were dead until I pressed connection button on trackpad. Message was displayed saying that connections to NAS RAID drive were lost 'ignore or disconnect' - I did nothing and this message disappeared. Finded showed no Shares at all. Firewire drive used for Time Machine (and others) then awoke and Time Machine briefly turned. Then a NAS Raid drive came to life on its own and, after a few minutes, Finder showed Sharing and then displayed the NAS - I clicked on NAS which displayed its partitions and then clicked on each individually to connect.
After all that, everything again seems as normal, but the above took around 10 minutes to achieve.
Energy Saver Settings are as below - unchanged since before ML (by me anyway)
I anticipate this whole procedure will repeat if I leave the system for an hour or so.
I shall next try changing Energy Saver settings by un-ticking the 'put disks to sleep' option.

Similar Messages

Memory RAM upgrade won't wake up after sleep mode

i just recently purchase a pair 16GB RAM of crucial CT2K8G3S160BM for newegg.com. Yeesterday i try put this on my macbook i7 intel 2.9 processor that crucial said is compatible. but found out everything was good until i close my mac lid for hibernate. What happen is, it won't wake up no matter what i do until a way of reset SMC. BTW i try stick by stick to plug in together with my original 4gb RAM together found out 1 was ok and other one was not. But somehow why the info of hardware show that memory ram 16GB was installed and was OK. Everything was run smooth even booting. The only problem is won't wake up after sleep mode. I already try reset smc, pram, delete startimage, delete powermanagement.file and also sudo hibernate 0-7. Did anyone had this same issue of me. I'm my curiousity will it be the bad ram or software problem.

i just google around and found this two both crucial ram. Both spec are the same but different model no.
CT102464BF160B 16GB and mine is CT2K8G3S160BM are this 2 same? but both same spec.
http://www.bhphotovideo.com/c/product/877010-REG/Crucial_Technology_CT102464BF16 0B_16GB_2_x.html
http://www.bhphotovideo.com/c/product/889298-REG/Crucial_CT2K8G3S160BM_16GB_2x8_ 204P_SODIMM.html

Macbook Air 2011 won't wake up after sleep

My Macbook Air 13" 2011 won't wake up after sleep. I've taken it to apple genies bar, but they offered to replace my logical board!
I bought the Macbook Air in last August. Why cannot they replace a new laptop???

One thing you want to do is "Repair Permissions" in Disk Utility before you upgrade to a new revision, and afterward do the same thing.
On occasion files will become inaccessible to the logged-in user and cause certain components of the OS from acting cooperatively. This can most often happen during/after an update. Also, by resetting permissions before an update, it is to ensure that the update process itself can accomplish all tasks.
You may also want to consider applying/re-applying the downloaded 10.7.3 "Combo Update" from the Apple.com/downloads/ section. After resetting permissions, of course.

1G iTouch won't wake up after sleep

1G iTouch won't wake up after sleep. When I plug it back into my laptop it does a complete reboot. Tried both reset and restore. Works fine as long as plugged in. It shows a full battery and drains properly but once it goes to sleep it acts like battery is fully discharged.

Is the iPod or the laptop going to sleep?
I can't tell for sure from your post.
When you restored, was it "as a new iPod" or from a backup?
What software is on the Touch?
Scott

My mac won't wake up from sleep, what can i do

My mac won't wake up from sleep, what can i do

Can you say more about thermal cut-off? My mac has beene having problems waking from sleep and I have noticed that I hear the fan running ever so slightly in the background. When I depress the power button for a second the fan shuts off.
Just open the side an dlook to see which fan it is. The lower fands are easy to see as well as the video card fan.
When you push the power button and that fan goes off is the machine now fully off? No power light? No fans spinning? Now drives spinning?
I don't recall what I did when my machine shut off with the one exhaust fan running. I think the obvious thing I would have tried would have been to push power button for 10 seconds to shut it down fully. That or actually pull the plug.
When this happens the only way to use my Mac is to restart via the power button.
Then I guess that answers the first question. It must have turned off since pushing the power button again was the normal reboot.
I can't find any helpful info on thermal cut-off so I was wondering if you could explain what it is, what causes it, and more importantly what I can do to fix it?
That was my term for it. What else could it be? Without its fan video card would get extremely hot and throw off all that heat. Whats the point of having temperature sensors in so many places other than to use that info to protect the machine against damage due to overheating? So my assumption was card gets hot, sensor (probably the pci slot 1 temperature sensor) senses it, kills the machine. It's also seems logical to me that the circuit(s) handling temperature overloads would want to keep a exhaust fan running to dump the heat out of the machine to further protect any damage from the heat.

Turn on! My mac won't turn on after sleeping!

Ever had a problem where your computer won't turn on after sleeping for a few minutes? (I've discovered that too many downloads cause this) Anyway... have you ever tried pushing the power button for one second? Try it! It's been working for me! Hope this helped!
(If it still won't turn on, try typing in letters randomly for one minute. Just type anything like: asdjhas)

Try resetting the SMC and PRAM
Intel-based Macs: Resetting the System Management Controller (SMC)
About NVRAM and PRAM

HELP! My Mac won`t wake up after installing Windows and Bootcamp

Hello,
I posted a message in another discussion earlier but I guess it is best to open a new discussion.
I upgraded to mac Leopard today (on a new 24 inch imac) and installed bootcamp.
In bootcamp I chose the 32GB FAT partition for windows, and everything worked fine until I had to choose the partition to install windows, where I could only choose a 115 GB (or so) partition. Fearing I'd mess up my Mac partition, I quit the windows installer (following the instructions in the installer) and since this, my mac wakes up with the mac sound and the screen remains blank. No matter what keys I push durin power up, or the installation CDs I insert, my Mac won't wake up!
Does anyone know what to do?
Is there a way to recover the master boot (or whatever it is called in mac?)
Thanks
Thanks!

I have had the same issue...
I just purchased my 20" iMac less than one week ago. I tried running boot camp and got an was not able to see my bootcamp partition in the windows installer. I quit the installer and now my computer launches into the white screen and will not progress further. I have tried various methods of recovery but to no avail. Here is a list:
_Using the iMac OSX Leopard installer disk_
• insert disk into iMac slot and boot pressing "c" - result = white screen
• insert disk into iMac slot and boot pressing "x" - result = white screen
• insert disk into iMac slot and boot pressing "option' - result = white screen w/ mouse pointer
• insert disk into Power Mac G4 in target mode and boot pressing "c" - result = white screen
• insert disk into Power Mac G4 in target mode and boot pressing "x" - result = white screen
• insert disk into Power Mac G4 in target mode and boot pressing "option' - result = white screen w/ mouse pointer
• trying to boot Intel iMac in Target mode pressing "t" - result = white screen
_Using General Purpose Leopard Disk_
Same results as above.
My question is there any way to get this system to recognize a boot disk or see any boot partition outside itself?
All of the above methods were done with the power cable being unplugged and plugged back in and being all sorts of careful. I have had the CAT-5 cable out of the system during whole process.
Is there some triple secret trick that I don't know about?
Note - I have worked on and serviced video and graphics systems on Mac 8200's on up (and others) for over 12 years. So I am not a babe in the woods. My guess here is that Boot Camp is doing something to the firmware and it is toast.
Message was edited by: Martin Mcgowan

MacBook Air won't wake up after sleep

I've been reporting sleep problems with my iMac for a while in the past. No-one here would take it seriously (probably hardware, your reports are incidents, no-one else has these problems) so I just went away and I disabled the sleep function of my iMac alltogether, and I won't select the "sleep" button in the login screen anymore, or select "sleep" from the apple menu. No sleep no problem, right?
*Well, I bought a Macbook Air three days ago, and in those three days I have had TWO occasions already where I wanted to wake the Macbook after sleep* (closed lid) and it wouldn't wake up. All I get is the rainbow mouse pointer and the Macbook is unusable unless I reboot it.
Mind you, nothing is connected to the macbook but the power cable, and I find it hard to believe that my Macbook Air would also suffer from 'hardware problems' like my iMac alledgedly is.
In all my time using OSX 10.4 on my 17" PowerPC MacBook pro I have never had any problems, but since switching to Intel Macs with 10.5 I have these "sleep" problems all the time.
What gives, and can I expect Apple to do anything about this problem that I've been having since I bought my iMac more than a year ago, and is now also spoiling my MacBook Air experience?

I have a Macbook Air and it also frequently (6 times out of 10) will not wake from sleep mode, only way to revive it is to hold down power button for 10 secs and force a restart. VERY FRUSTRATING!
I also occasionally use an external Apple 24' Screen (Non LED) and find that the MBAir will often freeze when you plug that into it or unplug it from it.. Perhaps I have a hardware fault on the MB Air? Or will this be fixed in software?

Computer won't wake up after sleep

I've been reporting sleep problems with my iMac for a while in the past. No-one here would take it seriously (probably hardware, your reports are incidents, no-one else has these problems) so I just went away and I disabled the sleep function of my iMac alltogether, and I won't select the "sleep" button in the login screen anymore, or select "sleep" from the apple menu. No sleep no problem, right?
Well, I bought a Macbook Air three days ago, and in those three days I have had TWO occasions already where I wanted to wake the Macbook after sleep (closed lid) and it wouldn't wake up. All I get is the rainbow mouse pointer and the Macbook is unusable unless I reboot it.
Mind you, nothing is connected to the macbook but the power cable, and I find it hard to believe that my Macbook Air would also suffer from 'hardware problems' like my iMac alledgedly is.
In all my time using OSX 10.4 on my 17" PowerPC MacBook pro I have never had any problems, but since switching to Intel Macs with 10.5 I have these "sleep" problems all the time.
What gives, and can I expect Apple to do anything about this problem that I've been having since I bought my iMac more than a year ago, and is now also spoiling my MacBook Air experience?

I have solved my sleep issue with some help from this forum. Intel iMac 20 and 24. Leopard.
1. Repair Disk Permissions with Disk Utility.
2. Download 10.5.6 Combo: http://www.apple.com/downloads/macosx/apple/macosx_updates/macosx1056comboupdate .html
3. Reboot, and install Combo.
4. Shutdown. Unplug all Firewire and USB connections, and iMac power cord. Wait 5mins.
5. Re-attach iMac power cord only, and reboot.
6. Optional. Run a day or so without Firewire and USB items to see if sleep allows waking after overnite sleeps.
I strongly suspect the Firewire controller is the suspect.

My mac won't wake up from sleep mode?

Can someone help? My mac goes to sleep after I leave work and won't wake up when I get back to my office the next day. I have read some other people have posted similar issues but I don't find the answer which will work for me.
thanks in advance.

bryan808,
If your Mac happily goes to sleep but won't wake up--Hold down the power switch to force-reboot your machine and get it running again.
Don't worry-your Mac isn't narcoleptic. Its Open Firmware system or NVRAM (nonvolatile RAM) is likely corrupt, and your Mac can't remember how to wake up.
Restart your Mac and immediately hold down the Command-Option-O-F key combo until you see a somewhat intimidating command-line display that ends with the Open Fimware prompt. Type the following line:
reset-nvram
press the return key on your keyboard
set-defaults
press return
reset-all
press return
Your Mac will reboot. Once it's running, put it back to sleep to test. If the problem recurs your Energy Saver preferences may be the culprit. Delete the com.apple.PowerManagement.plist file (go to Finder/Hard drive/Library/Preferences/SystemConfiguration)--don't worry, your Mac will regenerate a new one--and then restart to see if that rights the wrong.
Still didn't work? Might be time to call AppleCare or see an Apple Genius or a technician.
Cheers!
DALE

Satellite T230 - Won't wake up after sleep

I'm struggling with a problem on a new T230
After the machine goes to sleep, with Keyboard Wake enabled, it won't wake up no matter what I do. The only way out is to close it and restart or set it not to sleep, which undermines the main reason I bought it, the claims of long battery life
Any assistance will be most welcome

Hey,
Do you notice the same behavior when Wake on Keyboard is disabled?
Are you using the preinstalled Windows 7 from Toshiba?
To be honest its really strange that sleep mode doesnt work properly. I use often sleep mode and hibernation very often and it always works but I disabled Wake on Keyboard to safe battery power while its turned off and I have installed newest BIOS version from official Toshiba website.
Do you have newest BIOS version too?

Macbook Air 13" Mid2011 won't wake up after sleep again after replacing logic board

I have replaced my logic board a few days ago for the issue of not waking up after sleep.
It was good when I was in store and the same night.
1 day later, when I put the laptop to sleep by clicking the sleep menu item, I cannot wake it up by all means in the next morning!!!!! Again!!!!!
I hooked it with a 22" LCD monitor via thunderbold to HDMI+HDMI to DVI. Will that cause issue?
I'm not sure when this will end, I cannot just keep replacing my logic board!

I have a Macbook Air and it also frequently (6 times out of 10) will not wake from sleep mode, only way to revive it is to hold down power button for 10 secs and force a restart. VERY FRUSTRATING!
I also occasionally use an external Apple 24' Screen (Non LED) and find that the MBAir will often freeze when you plug that into it or unplug it from it.. Perhaps I have a hardware fault on the MB Air? Or will this be fixed in software?

Windows 7 won't wake up after sleep

I'm got a new Dell XPS 9000 desktop running Windows 7.   The system is set up to automatically shut down the display after 30 minutes and then put the computer is sleep after 2 hours. That works fine, however, when trying to wake up the computer after sleep, I heard the fan starting up, but nothing else happens. No display ever comes up. I am forced to shut the computer off (using the power button) and then restart it. When it does start up, it's resuming from sleep mode.
There have been a number of postings about Windows 7/sleep problems, but they are all a little different.
Anyone have any thoughts?
Thanks.

Just curious why drives would need to be updated.   This computer was just shipped to me.   Have not checked BIOS yet. What setting need to be set for sleep?
Hybrid sleep was already turned off.   Ran the powercfg -energy.   There were lots of errors. Not sure how to interpret this document.
Power Efficiency Diagnostics Report
Computer Name
DELL9000
Scan Time
2010-03-23T03:06:34Z
Scan Duration
60 seconds
System Manufacturer
DELL Inc.
System Product Name
Studio XPS 435T/9000
BIOS Date
10/26/2009
BIOS Version
A14
OS Build
7600
Platform Role
PlatformRoleDesktop
Plugged In
true
Process Count
87
Thread Count
1201
Report GUID
{c18f598e-7719-4851-b89b-27b70721ce7f}
Analysis Results
Errors
USB Suspend:USB Device not Entering Suspend
The USB device did not enter the Suspend state. Processor power management may be prevented if a USB device does not enter the Suspend state when not in use.
Device Name
eHome Infrared Receiver (USBCIR)
Host Controller ID
PCI\VEN_8086&DEV_3A35
Host Controller Location
PCI bus 0, device 29, function 1
Device ID
USB\VID_04EB&PID_E033
Port Path
2
USB Suspend:USB Device not Entering Suspend
The USB device did not enter the Suspend state. Processor power management may be prevented if a USB device does not enter the Suspend state when not in use.
Device Name
Realtek USB 2.0 Card Reader
Host Controller ID
PCI\VEN_8086&DEV_3A3A
Host Controller Location
PCI bus 0, device 29, function 7
Device ID
USB\VID_0BDA&PID_0151
Port Path
3
USB Suspend:USB Device not Entering Suspend
The USB device did not enter the Suspend state. Processor power management may be prevented if a USB device does not enter the Suspend state when not in use.
Device Name
USB Root Hub
Host Controller ID
PCI\VEN_8086&DEV_3A38
Host Controller Location
PCI bus 0, device 26, function 1
Device ID
USB\VID_8086&PID_3A38
Port Path
USB Suspend:USB Device not Entering Suspend
The USB device did not enter the Suspend state. Processor power management may be prevented if a USB device does not enter the Suspend state when not in use.
Device Name
USB Root Hub
Host Controller ID
PCI\VEN_8086&DEV_3A35
Host Controller Location
PCI bus 0, device 29, function 1
Device ID
USB\VID_8086&PID_3A35
Port Path
USB Suspend:USB Device not Entering Suspend
The USB device did not enter the Suspend state. Processor power management may be prevented if a USB device does not enter the Suspend state when not in use.
Device Name
USB Root Hub
Host Controller ID
PCI\VEN_8086&DEV_3A36
Host Controller Location
PCI bus 0, device 29, function 2
Device ID
USB\VID_8086&PID_3A36
Port Path
USB Suspend:USB Device not Entering Suspend
The USB device did not enter the Suspend state. Processor power management may be prevented if a USB device does not enter the Suspend state when not in use.
Device Name
USB Root Hub
Host Controller ID
PCI\VEN_8086&DEV_3A3A
Host Controller Location
PCI bus 0, device 29, function 7
Device ID
USB\VID_8086&PID_3A3A
Port Path
USB Suspend:USB Device not Entering Suspend
The USB device did not enter the Suspend state. Processor power management may be prevented if a USB device does not enter the Suspend state when not in use.
Device Name
USB Composite Device
Host Controller ID
PCI\VEN_8086&DEV_3A36
Host Controller Location
PCI bus 0, device 29, function 2
Device ID
USB\VID_046D&PID_C517
Port Path
2
USB Suspend:USB Device not Entering Suspend
The USB device did not enter the Suspend state. Processor power management may be prevented if a USB device does not enter the Suspend state when not in use.
Device Name
USB Mass Storage Device
Host Controller ID
PCI\VEN_8086&DEV_3A3A
Host Controller Location
PCI bus 0, device 29, function 7
Device ID
USB\VID_059B&PID_0370
Port Path
5
USB Suspend:USB Device not Entering Suspend
The USB device did not enter the Suspend state. Processor power management may be prevented if a USB device does not enter the Suspend state when not in use.
Device Name
Saitek Cyborg Evo Wireless (USB)
Host Controller ID
PCI\VEN_8086&DEV_3A38
Host Controller Location
PCI bus 0, device 26, function 1
Device ID
USB\VID_06A3&PID_353E
Port Path
1
Platform Power Management Capabilities:ACPI _PSD Object Failed Validation
There is a problem with the definition of the ACPI _PSD object on this computer. Installing the latest system firmware (BIOS) may resolve this issue.
Group
0
Index
0
Platform Power Management Capabilities:ACPI _PSD Object Failed Validation
There is a problem with the definition of the ACPI _PSD object on this computer. Installing the latest system firmware (BIOS) may resolve this issue.
Group
0
Index
1
Platform Power Management Capabilities:ACPI _PSD Object Failed Validation
There is a problem with the definition of the ACPI _PSD object on this computer. Installing the latest system firmware (BIOS) may resolve this issue.
Group
0
Index
2
Platform Power Management Capabilities:ACPI _PSD Object Failed Validation
There is a problem with the definition of the ACPI _PSD object on this computer. Installing the latest system firmware (BIOS) may resolve this issue.
Group
0
Index
3
Platform Power Management Capabilities:ACPI _PSD Object Failed Validation
There is a problem with the definition of the ACPI _PSD object on this computer. Installing the latest system firmware (BIOS) may resolve this issue.
Group
0
Index
4
Platform Power Management Capabilities:ACPI _PSD Object Failed Validation
There is a problem with the definition of the ACPI _PSD object on this computer. Installing the latest system firmware (BIOS) may resolve this issue.
Group
0
Index
5
Platform Power Management Capabilities:ACPI _PSD Object Failed Validation
There is a problem with the definition of the ACPI _PSD object on this computer. Installing the latest system firmware (BIOS) may resolve this issue.
Group
0
Index
6
Platform Power Management Capabilities:ACPI _PSD Object Failed Validation
There is a problem with the definition of the ACPI _PSD object on this computer. Installing the latest system firmware (BIOS) may resolve this issue.
Group
0
Index
7
Warnings
Power Policy:Display timeout is long (Plugged In)
The display is configured to turn off after longer than 10 minutes.
Timeout (seconds)
1800
Power Policy:Sleep timeout is long (Plugged In)
The computer is configured to automatically sleep after longer than 30 minutes.
Timeout (seconds)
7200
Power Policy:802.11 Radio Power Policy is Maximum Performance (Plugged In)
The current power policy for 802.11-compatible wireless network adapters is not configured to use low-power modes.
CPU Utilization:Processor utilization is moderate
The average processor utilization during the trace was moderate. The system will consume less power when the average processor utilization is very low. Review processor utilization for individual processes to determine which applications and services contribute the most to total processor utilization.
Average Utilization (%)
3.16
CPU Utilization:Individual process with significant processor utilization.
This process is responsible for a significant portion of the total processor utilization recorded during the trace.
Process Name
DellDock.exe
PID
4176
Average Utilization (%)
1.50
Module
Average Module Utilization (%)
\Device\HarddiskVolume3\Windows\winsxs\amd64_microsoft.windows.gdiplus_6595b64144ccf1df_1.1.7600.16385_none_2b4f45e87195fcc4\GdiPlus.dll
1.14
\Device\HarddiskVolume3\Windows\System32\msvcrt.dll
0.20
\SystemRoot\System32\win32k.sys
0.04
CPU Utilization:Individual process with significant processor utilization.
This process is responsible for a significant portion of the total processor utilization recorded during the trace.
Process Name
System
PID
4
Average Utilization (%)
0.65
Module
Average Module Utilization (%)
\SystemRoot\system32\hal.dll
0.35
\SystemRoot\system32\DRIVERS\athrx.sys
0.18
\SystemRoot\system32\ntoskrnl.exe
0.06
Information
Platform Timer Resolution:Platform Timer Resolution
The default platform timer resolution is 15.6ms (15625000ns) and should be used whenever the system is idle. If the timer resolution is increased, processor power management technologies may not be effective. The timer resolution may be increased due to multimedia playback or graphical animations.
Current Timer Resolution (100ns units)
156000
Power Policy:Active Power Plan
The current power plan in use
Plan Name
Custom
Plan GUID
{49ef8fc0-bb7f-488e-b6a0-f1fc77ec649b}
Power Policy:Power Plan Personality (Plugged In)
The personality of the current power plan when the system is plugged in.
Personality
Balanced
Power Policy:Video quality (Plugged In)
Enables Windows Media Player to optimize for quality or power savings when playing video.
Quality Mode
Optimize for Video Quality
System Availability Requests:Analysis Success
Analysis was successful. No energy efficiency problems were found. No information was returned.
Battery:Analysis Success
Analysis was successful. No energy efficiency problems were found. No information was returned.
Platform Power Management Capabilities:Supported Sleep States
Sleep states allow the computer to enter low-power modes after a period of inactivity. The S3 sleep state is the default sleep state for Windows platforms. The S3 sleep state consumes only enough power to preserve memory contents and allow the computer to resume working quickly. Very few platforms support the S1 or S2 Sleep states.
S1 Sleep Supported
false
S2 Sleep Supported
false
S3 Sleep Supported
true
S4 Sleep Supported
true
Platform Power Management Capabilities:Processor Power Management Capabilities
Effective processor power management enables the computer to automatically balance performance and energy consumption.
Group
0
Index
0
Idle (C) State Count
3
Performance (P) State Count
10
Throttle (T) State Count
0
Platform Power Management Capabilities:Processor Power Management Capabilities
Effective processor power management enables the computer to automatically balance performance and energy consumption.
Group
0
Index
1
Idle (C) State Count
3
Performance (P) State Count
10
Throttle (T) State Count
0
Platform Power Management Capabilities:Processor Power Management Capabilities
Effective processor power management enables the computer to automatically balance performance and energy consumption.
Group
0
Index
2
Idle (C) State Count
3
Performance (P) State Count
10
Throttle (T) State Count
0
Platform Power Management Capabilities:Processor Power Management Capabilities
Effective processor power management enables the computer to automatically balance performance and energy consumption.
Group
0
Index
3
Idle (C) State Count
3
Performance (P) State Count
10
Throttle (T) State Count
0
Platform Power Management Capabilities:Processor Power Management Capabilities
Effective processor power management enables the computer to automatically balance performance and energy consumption.
Group
0
Index
4
Idle (C) State Count
3
Performance (P) State Count
10
Throttle (T) State Count
0
Platform Power Management Capabilities:Processor Power Management Capabilities
Effective processor power management enables the computer to automatically balance performance and energy consumption.
Group
0
Index
5
Idle (C) State Count
3
Performance (P) State Count
10
Throttle (T) State Count
0
Platform Power Management Capabilities:Processor Power Management Capabilities
Effective processor power management enables the computer to automatically balance performance and energy consumption.
Group
0
Index
6
Idle (C) State Count
3
Performance (P) State Count
10
Throttle (T) State Count
0
Platform Power Management Capabilities:Processor Power Management Capabilities
Effective processor power management enables the computer to automatically balance performance and energy consumption.
Group
0
Index
7
Idle (C) State Count
3
Performance (P) State Count
10
Throttle (T) State Count
0

Won't wake up after sleep

My desktop won't wake up when it's been sleeping for a few hours. It wakes up short term. It just started this a few weeks ago. Any thoughts?

Well my solution may not be the most cientific one but it works for me (at least until the real solution comes to the public)...
My computer has the problem that when it goes to sleep mode she never comes back... but it the screen that does not comes back... all the system is workin in behind (its like the brightness level was set on the less power possible) so i had to turn off the computer and had to do for a long time some times i had to wait that the computer cooled off a little and then try again to turn it on... I some tried things that the support page of apple said it could be... but did worked out... i dont know i think is a problem over 2 factors...
1. heating (the screen generates to many heat but, TO MANY!)
2. tiger os the OS "sleep mode" (it knows that the screen its heating a lot and tries to go to sleep to prevent over heating and damage)
So based on this i tried conecting a external monitor to the computer while she was unable to "awake" (or to show some thing in the screen)... and it worked whit no problem at all... so my conclusion was to prevent the over heating (1st factor) and the sleep mode (2nd factor)... so I deactivated the sleep mode setting up the computer to a never sleep mode... and to prevente the over heating well I use a low bright and when i need more brightness (to se the colors of what im doing or some thing like that) I use high brightness... when I away I set the brightness level to no brightness so there is no over heat and no sleep mode (cus if it is deactivated and it over heats it will go to sleep anyway...
Soooooo....
1. deactivate Sleep mode...
2. Activate a Screen saver...
3. And remember to contro your brightness your self... and turn it off when you are not using your computer...
well i hope it works for some body :P cya...

Hi my mac wouldn't wake up after sleep so I read to try deleting power management plist but not I have whole lot of other problems help?

I'm running snow leopard and now I just got a panic on computer and it froze. I'm an idiot I shouldn't have trusted what I read in a support comment : my mac wasn't waking up from sleep so read if j deleted power Managment plist it would possibly fix issue and that the file would regenerate obviously it hasn't so what can I do ?

Reset the SMC, as per > Resetting the System Management Controller
1. Shut down the computer.
2. Unplug the computer's power cord.
3. Wait fifteen seconds.
4. Attach the computer's power cord.
5. Wait five seconds, then press the power button to turn on the computer.
Also, what mouse and keyboard are you using...? If they are wireless, go to Apple > System Preferences > Bluetooth > click Advanced > click Allow Bluetooth Devices to wake this computer.

Mac won't wake up after sleep

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