Cannot Wake Up Sleeping WI-FI Computer

ARD V3.2.1 can direct a WI-FI Client to go to Sleep but cannot wake up the same WI-FI connected computer. This can only be accomplished via an Ethernet connection.
Recommend that this option be made available in a future software update.

And to clarify what I meant by "can't be done", not only it is not possible today, it's probably not something that could ever be done. A completely new scheme for waking a computer would have to be developed, one that did not depend on directed broadcast, and that's not likely to happen.
So again, sorry, but there no solution now nor will there probably be one anytime in the foreseeable future.

Similar Messages

MacBook won't automatically wake from sleep after flipping computer open.

The only way my computer both goes to sleep and wakes from sleep is by clicking on the Apple icon and putting it to sleep before closing the lid and by pressing the power button after opening the lid. If I just close the lid without first clicking on "Sleep" under the Apple icon, the computer will continue to run and the Apple on the lid will continue to be lit while the sleep indicator light does not go on. If I just open the lid and do not press the power button, the screen will continue to be black and the sleep indicator light continues to glow. I'm not sure if I reset a system preference or something by mistake, but is there a way to fix this? Or is this an indication of a bigger problem?
Additionally, when my computer is asleep and I unplug my charging iPod, it wakes from sleep (the sleep indicator light goes black while the Apple on the back of the screen lights up). Is this an indication of a bigger problem?
My computer is only about 7 months old, so I am a bit worried if it is starting to show wear and tear already. Thank you for your help!

You're welcome to the Forums.
Go to System Preferences>Energy Saver, and set a time for your System to sleep.
Set both sliders to 10 or 15mins to nod off, when Inactive.
It's never a good idea to plug in or out, while the Computer is sleeping. If someone pokes at your ear while you're sleeping, you'll wake up too.

MacBookPro cannot wake from sleep mode.

My MBP cannot wake from a sleep mode. This doesn't happen all the time, but it is much more often since installing Mountain Lion. The only way to wake it is to force quit and restart. I've done a SMC and it did not help.

Have you also tried to reset the PRAM as well?
Reset PRAM:
http://support.apple.com/kb/ht1379
I found that if you purge the memory.
In the Mac Terminal, type:
purge
Delete saved memory state sleep file:
In the Mac Terminal, type:
sudo rm /private/var/vm/sleepimage

Cannot wake from sleep

Since installing Mountain Lion, my MBP sometimes goes to sleep and will not wake up. I have to force shut it down and then restart.

Please read this whole message before doing anything. This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it. The purpose of this exercise is to determine whether the problem is caused by third-party system modifications that load automatically at startup or login. Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode* and log in to the account with the problem. The instructions provided by Apple are as follows:
Shut down your computer, wait 30 seconds, and then hold down the shift key while pressing the power button.
When you see the gray Apple logo, release the shift key.
If you are prompted to log in, type your password, and then hold down the shift key again as you click Log in.
*Note: If FileVault is enabled under OS X 10.7 or later, or if a firmware password is set, you can’t boot in safe mode. Safe mode is much slower to boot and run than normal, and some things won’t work at all, including wireless networking on certain Macs. The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin. Test while in safe mode. Same problem(s)? After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of the test.

MBP Wake from Sleep - VRAM corruption

Just moved from G4 -> MBP. When the computer goes to sleep, ~20% of the time when I wake from sleep (opening the screen), I get a flurry of ASCII like characters that move across the screen forever, only cleared by a hard reboot (maybe a soft reboot if I could see the underlying graphics window, but I cannot).
Any thoughts... my guess is a bad graphics card, anyone else have this problem or have an idea?

I had a similar issue. Wake from sleep sometimes the computer would reload but the screen would simply not turn on...
Just had my MLB replaced for the whine issue and that issue appears to be gone as well...with the MLB, you get a new CPU and GPU as well.
Macbook Pro 2ghz Mac OS X (10.4.7)

T500 2081 - Very Strange Standby/Sleep Issue (Cannot Wake Computer Up?)

In the last month or two, I have been experiencing issues when putting my T500 2081 (with dedicated graphics - currently using Energy savings mode, or integrated graphics) into sleep mode.
In the first month or so, the computer sometimes made a long sequence of beeps when I tried the wake the machine up, then computer then would restart and get stuck at a black screen. (A forceful shutdown was required to reboot the machine) (Power indicator on, sleep indicator off)
Since then, I never got the beeps anymore, although it has progressed to just being stuck after the machine is awakened. (While the power indicator shows that the machine is on, the sleep (moon) indicator remains lit.) A force shutdown was still required to reboot the machine.
Now, it again has progressed to something totally different. When the computer awakes, the power will completely shut off for a second (it makes the same sound that is made when you forcefully shut down your computer), then the computer turns on again, but gets stuck at a black screen. (Power indicator is on, sleep indicator off) Once again, a forceful shutdown was required to reboot the machine.
If I were to look in the System event logs, it would see this whenever it freezes up after being awaken:
"The last sleep transition was unsuccessful. This error could be caused if the system stopped responding, failed, or lost power during the sleep transition."
Interestingly, the computer would only freeze when it is put into sleep for a very long time. (ex. leaving the computer in sleep mode overnight versus putting it to sleep for 15 minutes.) The computer usually do not freeze when it is put into sleep for a short duration such as an hour or 15 minutes.
I was wondering if this would be caused by faulty drivers, or perhaps maybe a bug in the design of the video card drivers and/or the BIOS.
I am running Windows Vista Ultimate 32 bit SP2, BIOS version 3.00, and is using the latest switchable graphics driver provided by Lenovo. I have tried reinstalling the graphics drivers and resetting the BIOS settings to default. No avail. Anyone has the same issues and wanted to share their experiences?
Thanks!
Message Edited by swg0101 on 06-04-2009 12:49 PM

I hope someone else will have some ideas.
Only two vague thoughts occur to me:
Vista SP2 is very new, so it might indeed be a BIOS or driver conflict, as you suggested.
Especially if you've recently updated the video driver, you might try rolling it back to an earlier version if possible.
As a work-around, can you just use hibernate for now? Or does that fail as well?
Good luck!
Results of Your Ideal Business-Class Laptop survey, concluded 2009-07-29.
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Say thanks! with a kudo.
Even better: Pay it forward, help someone else.

I cannot get the new mac mini to wake from sleep and trigger the displays - this is the second mac mini I have had and both have had the same issues. It worked before on my macbook extremely well...

I cannot get the new mac mini to wake from sleep and trigger the displays - this is the second mac mini I have had and both have had the same issues. It worked before on my macbook extremely well...
Using 2 displays, connected via HDMI and thunderbolt
Been on to support a number of times now - is anyone experiencing the same issues?

BUMP.
I actually showed this to Apple geniuses when I took my computer to the apple store, and it's still here. In console it says:
kernel[0]: Previous Shutdown Cause: -128
I don't know if that's related or not, but maybe helps?

Computer won't wake from sleep

For some reason when I leave my computer alone for more than about 15 mins and the display goes to sleep, I cannot wake it back up. I have to hold down the power button to force a restart. I would prefer not to do this as I lose everything that I was working on. I just did a clean (format and reinstall) install of Snow Leopard last week and downloaded all the updates as per Software Update.
Here is the report I get when I reboot the machine:
Interval Since Last Panic Report: 172784 sec
Panics Since Last Report:          6
Anonymous UUID:                    4EAD0A2D-C73C-4930-9EE0-60929B537D75
Tue Jun 21 18:07:15 2011
panic(cpu 0 caller 0xffffff80002d1208): Kernel trap at 0xffffff800022ac78, type 14=page fault, registers:
CR0: 0x0000000080010033, CR2: 0x0000000400178727, CR3: 0x000000011f03c000, CR4: 0x0000000000040660
RAX: 0xffffff8016b6c7e8, RBX: 0x00000000914015ca, RCX: 0x0000000000000012, RDX: 0x0000000000000012
RSP: 0xffffff80b17eb470, RBP: 0xffffff80b17eb470, RSI: 0xffffff80b17eb510, RDI: 0x0000000400178727
R8: 0x0000000000000000, R9: 0x0000000000000001, R10: 0x0000000000000000, R11: 0x0000000000000000
R12: 0xffffff8026388e08, R13: 0x0000000000000012, R14: 0xffffff80b1946e58, R15: 0xffffff80b17eb510
RFL: 0x0000000000010206, RIP: 0xffffff800022ac78, CS: 0x0000000000000008, SS: 0x0000000000000010
Error code: 0x0000000000000000
Backtrace (CPU 0), Frame : Return Address
0xffffff80b17eb110 : 0xffffff8000204d15
0xffffff80b17eb210 : 0xffffff80002d1208
0xffffff80b17eb360 : 0xffffff80002e3f4a
0xffffff80b17eb370 : 0xffffff800022ac78
0xffffff80b17eb470 : 0xffffff8000234684
0xffffff80b17eb4d0 : 0xffffff80004212be
0xffffff80b17eb5d0 : 0xffffff80004221d0
0xffffff80b17eb760 : 0xffffff80004256f1
0xffffff80b17eb800 : 0xffffff800042f8d4
0xffffff80b17eb9c0 : 0xffffff800023db0c
0xffffff80b17eba00 : 0xffffff8000235ed7
0xffffff80b17ebad0 : 0xffffff8000236bef
0xffffff80b17ebbd0 : 0xffffff8000302782
0xffffff80b17ebd60 : 0xffffff8000302b00
0xffffff80b17ebf40 : 0xffffff80004e8158
0xffffff80b17ebfa0 : 0xffffff80002e4874
BSD process name corresponding to current thread: virusbarriers
Mac OS version:
10J4138
Kernel version:
Darwin Kernel Version 10.7.4: Mon Apr 18 21:24:17 PDT 2011; root:xnu-1504.14.12~3/RELEASE_X86_64
System model name: MacBookPro8,3 (Mac-942459F5819B171B)
System uptime in nanoseconds: 39121162047609
1 pagetable corruption incident(s) detected, timeout: 0
Incident 0x1, reason: 0x8, action: 0x4, time: 0x255536c4dcc
unloaded kexts:
com.intego.iokit.BehavioralKext          1 (addr 0xffffff7f81705000, size 0x12288) - last unloaded 36221862217803
loaded kexts:
com.intego.iokit.VirusBarrierX6Service          10.6.12 - last loaded 36235199674314
com.intego.iokit.BehavioralKext          1
com.intego.iokit.VBX6NKE          1
com.intego.kext.VirusBarrier.AppBarrierKPI          10.6.12
com.intego.kext.VirusBarrierKPI          10.6.12
com.apple.filesystems.afpfs          9.7
com.apple.nke.asp_tcp          5.0
com.apple.filesystems.autofs          2.1.0
com.apple.driver.AppleHWSensor          1.9.3d0
com.apple.driver.AGPM          100.12.31
com.apple.driver.AppleMikeyHIDDriver          1.2.0
com.apple.driver.AppleHDA          2.0.5f13
com.apple.driver.AppleMikeyDriver          2.0.5f13
com.apple.driver.AudioAUUC          1.57
com.apple.kext.ATIFramebuffer          6.3.4
com.apple.driver.AppleUpstreamUserClient          3.5.7
com.apple.driver.AppleMCCSControl          1.0.20
com.apple.Dont_Steal_Mac_OS_X          7.0.0
com.apple.driver.AudioIPCDriver          1.1.6
com.apple.driver.ACPI_SMC_PlatformPlugin          4.7.0a1
com.apple.driver.AppleLPC          1.5.1
com.apple.driver.AppleGraphicsControl          2.10.6
com.apple.ATIRadeonX3000          6.3.4
com.apple.kext.AppleSMCLMU          1.5.2d10
com.apple.driver.AppleIntelHDGraphics          6.3.4
com.apple.driver.AppleIntelSNBGraphicsFB          6.3.4
com.apple.driver.SMCMotionSensor          3.0.1d2
com.apple.driver.AppleUSBTCButtons          201.2
com.apple.driver.AppleUSBTCKeyboard          201.2
com.apple.driver.AppleIRController          303.8
com.apple.BootCache          31
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
com.apple.iokit.IOAHCIBlockStorage          1.6.4
com.apple.driver.AppleUSBHub          4.2.0
com.apple.driver.AppleFWOHCI          4.7.3
com.apple.driver.AirPort.Brcm4331          432.11.3
com.apple.iokit.AppleBCM5701Ethernet          3.0.5b8
com.apple.driver.AppleEFINVRAM          1.4.0
com.apple.driver.AppleSmartBatteryManager          160.0.0
com.apple.driver.AppleAHCIPort          2.1.7
com.apple.driver.AppleUSBEHCI          4.2.0
com.apple.driver.AppleACPIButtons          1.3.6
com.apple.driver.AppleRTC          1.3.1
com.apple.driver.AppleHPET          1.5
com.apple.driver.AppleSMBIOS          1.7
com.apple.driver.AppleACPIEC          1.3.6
com.apple.driver.AppleAPIC          1.4
com.apple.driver.AppleIntelCPUPowerManagementClient          142.6.0
com.apple.security.sandbox          1
com.apple.security.quarantine          0
com.apple.nke.applicationfirewall          2.1.11
com.apple.driver.AppleIntelCPUPowerManagement          142.6.0
com.apple.iokit.IOSCSIBlockCommandsDevice          2.6.8
com.apple.iokit.IOUSBMassStorageClass          2.6.6
com.apple.iokit.IOSCSIArchitectureModelFamily          2.6.8
com.apple.driver.AppleProfileReadCounterAction          17
com.apple.driver.DspFuncLib          2.0.5f13
com.apple.driver.AppleProfileTimestampAction          10
com.apple.driver.AppleProfileThreadInfoAction          14
com.apple.driver.AppleProfileRegisterStateAction          10
com.apple.driver.AppleProfileKEventAction          10
com.apple.driver.AppleProfileCallstackAction          20
com.apple.driver.AppleSMBusController          1.0.10d0
com.apple.iokit.IOFireWireIP          2.0.3
com.apple.iokit.IOSurface          74.2
com.apple.iokit.IOBluetoothSerialManager          2.4.5f1
com.apple.iokit.IOSerialFamily          10.0.3
com.apple.iokit.IOAudioFamily          1.8.3fc2
com.apple.kext.OSvKernDSPLib          1.3
com.apple.driver.AppleHDAController          2.0.5f13
com.apple.iokit.IOHDAFamily          2.0.5f13
com.apple.iokit.AppleProfileFamily          41
com.apple.driver.IOPlatformPluginFamily          4.7.0a1
com.apple.driver.AppleSMBusPCI          1.0.10d0
com.apple.driver.AppleBacklightExpert          1.0.1
com.apple.driver.AppleThunderboltEDMSink          1.0.5
com.apple.driver.AppleThunderboltEDMSource          1.0.5
com.apple.kext.ATI6000Controller          6.3.4
com.apple.kext.ATISupport          6.3.4
com.apple.iokit.IONDRVSupport          2.2
com.apple.iokit.IOGraphicsFamily          2.2
com.apple.driver.AppleSMC          3.1.0d5
com.apple.driver.AppleThunderboltDPOutAdapter          1.2.0
com.apple.driver.AppleThunderboltDPInAdapter          1.2.0
com.apple.driver.AppleThunderboltDPAdapterFamily          1.2.0
com.apple.driver.AppleThunderboltPCIDownAdapter          1.1.5
com.apple.driver.BroadcomUSBBluetoothHCIController          2.4.5f1
com.apple.driver.AppleUSBBluetoothHCIController          2.4.5f1
com.apple.iokit.IOBluetoothFamily          2.4.5f1
com.apple.driver.AppleUSBMultitouch          207.5
com.apple.iokit.IOUSBHIDDriver          4.2.0
com.apple.driver.AppleUSBMergeNub          4.2.2
com.apple.driver.AppleUSBComposite          3.9.0
com.apple.driver.XsanFilter          402.1
com.apple.driver.AppleThunderboltNHI          1.2.3
com.apple.iokit.IOThunderboltFamily          1.3.5
com.apple.iokit.IOUSBUserClient          4.2.0
com.apple.iokit.IOFireWireFamily          4.2.6
com.apple.iokit.IO80211Family          320.1
com.apple.iokit.IONetworkingFamily          1.10
com.apple.iokit.IOAHCIFamily          2.0.6
com.apple.iokit.IOUSBFamily          4.2.2
com.apple.driver.AppleEFIRuntime          1.4.0
com.apple.iokit.IOHIDFamily          1.6.6
com.apple.iokit.IOSMBusFamily          1.1
com.apple.kext.AppleMatch          1.0.0d1
com.apple.security.TMSafetyNet          6
com.apple.driver.DiskImages          289
com.apple.iokit.IOStorageFamily          1.6.3
com.apple.driver.AppleACPIPlatform          1.3.6
com.apple.iokit.IOPCIFamily          2.6.3
com.apple.iokit.IOACPIFamily          1.3.0
Model: MacBookPro8,3, BootROM MBP81.0047.B0E, 4 processors, Intel Core i7, 2.3 GHz, 8 GB, SMC 1.70f3
Graphics: AMD Radeon HD 6750M, AMD Radeon HD 6750M, PCIe, 1024 MB
Graphics: Intel HD Graphics 3000, Intel HD Graphics 3000, Built-In, 512 MB
Memory Module: global_name
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xD6), Broadcom BCM43xx 1.0 5.100.198.104.3)
Bluetooth: Version 2.4.5f1, 2 service, 19 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: M4-CT512M4SSD2, 476.94 GB
Serial ATA Device: M4-CT512M4SSD2, 476.94 GB
USB Device: FaceTime HD Camera (Built-in), 0x05ac (Apple Inc.), 0x8509, 0xfa200000 / 3
USB Device: Hub, 0x0424 (SMSC), 0x2514, 0xfa100000 / 2
USB Device: Apple Internal Keyboard / Trackpad, 0x05ac (Apple Inc.), 0x0245, 0xfa120000 / 5
USB Device: BRCM2070 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 4
USB Device: Bluetooth USB Host Controller, 0x05ac (Apple Inc.), 0x821a, 0xfa113000 / 8
USB Device: Hub, 0x0424 (SMSC), 0x2514, 0xfd100000 / 2
USB Device: IR Receiver, 0x05ac (Apple Inc.), 0x8242, 0xfd110000 / 3

Sounds like you need to take it to Apple if it's under warranty or AppleCare, or to a repair shop.

Mac Mini 2014 Oct cannot wake up after sleep

Mac Mini 2014 Oct Version, cannot wake up after sleep by typing on keyboard or moving mouse (both hardwired USB) if external HDMI screen goes to sleep mode too (usually after 1 min if no signal coming from the MAC). To wake up, I ust turn off and turn on the screen and keep typing on the keyboard. I already checked "prevent computer from sleeping if display goes to sleep". But does not help. This is very annoying. I now try to set the sleep timer to more than 1 hour. Wasting my energy and not helping. I tried connecting my HDMI screen to a HDMI to mini-Display port adaptor cable, then plug into the thunderbolt port of the MAC. Same issue, no improvement.

I may know whats going on with the wake from sleep issue. I have a Mac Mini 2012 but this fix (see below) should work on any product running 10.8.2 Mine is at 10.10.1 and it worked.   First off you can tell if your Mac Mini is in sleep mode by looking at the small light on the front of the Mini. If its pulsing... going from bright to dim its in sleep mode. If you put your Mac in sleep mode, or it goes into sleep mode it will wake from sleep BUT ONLY for the first 4 hours. After 4 hours it will go into what is known as "safe sleep". The light on the front will be off and you won't be able to wake your Mac. The only way to wake the Mac when in safe sleep is to hit the power button and then wait a minute or longer as your system will need to pull the data from the disk and load to ram. This is causing the issue where its not waking from sleep. You can move your mouse or hit the keys all you want but it won't wake from sleep. This is a real pain as you have to press the power button on the back of the Mac mini and wait for the system to come out of its slumber.   Here's what Apple says:
With the release of the OS X Mountain Lion v10.8.2 supplemental update 2.0, a new feature was introduced to enter safe sleep after four hours of the computer being connected to AC power. This is an effort to comply with the European Energy Standards (ErP Lot6). This will only occur if there is no wireless or Ethernet activity and no activity from external devices such as USB storage devices. This is normal behavior for the following models:
MacBook Pro (Mid 2012 and later)
MacBook Pro (Retina, Mid 2012 and later)
MacBook Air (Mid 2012 and later)
iMac (Late 2012 and later)
Mac mini (Late 2012 and later)
I have found a fix that puts an end to this nonsense..... Go to the Mac terminal (Google if you don't know how or youtube) and run the following commands (Very easy to do and if a novice like my self can do you can for sure)
1. When in the terminal mode type:
pmset -g          This will show your current configuration of your sleep, hibernate, etc You may want to print so you can restore these values if needed.
2. Change your standbydelay to 86400    86400 is number of seconds which is 24 hours. Here’s the command:
sudo pmset -a standbydelay 86400
3. Change autopoweroffdelay to 86400 Here’s the command:
sudo pmset -a autopoweroffdelay 86400
4. At last but not least change autopoweroff to 0   Here’s the command:
sudo pmset -a autopoweroff 0
Run pmset -g to verify your setting have changed. I rebooted my system and checked again to make sure. Since I made the changes no more going into Safe sleep!!! You can change the values to what you like. I used 86400 secs. (24 hours) I hope this helps!

Audio volume low when computer wakes from sleep - os x yosemite

I've been having an issue ever since I upgraded to OS X Yosemite, where the audio volume coming out of my external speakers is extremely low after I wake my computer up from sleep. The only resolution I have found is restarting the computer. Once I do that, the audio volume is great. If I were to boot up my computer after it has been completely shut down, the audio volume is also great. The issue only occurs after sleep. Anyone else having a similar issue? Is there another fix besides restarting the computer?
Speakers: Bose Companion 2 Series II (these are wired, not bluetooth)
Computer: Mac Pro - late 2013 - running Yosemite

This is a BUG. It has been submitted to engineering many times - unfortunately Apple has not done anything about it.   We have 5 Mac Pros, all 5 do the same thing after updating to Yosemite.   The PRAM / SMC reset is useless - we even installed a fresh OS on one of the machines (a suggestion of the level 2 Apple tech) same problem.   Clearly this is a system level bug.   Only way to get it resolved is to keep pounding the bug report site with requests.     The squeaky wheel gets the oil.   The problem is 100% repeatable on the machines that exhibit the bug.
In the mean time set up an applescript with this command and it will reset the sound - do not include the brackets :
<do shell script "sudo killall coreaudiod" with administrator privileges>
Run it every time you wake from sleep and you won't have to deal with the problem ever again.
Pretty lame that Apple has not fixed it even though the problem appears to be pretty widespread.

Display Changes Resolution When Computer Wakes From Sleep

I have a MacBook Pro bought in May of 2006. In the last year, this problem has been getting progressively more annoying to me. When the computer wakes from sleep (not every time, but most of the time) the screen will flash blue, then reset the resolution to 640 x 480, I think. To fix it, all I have to do is go to System Preferences and change the resolution, but when I do that, it pops up two windows, like it thinks I have a dual display set up. To fix this, I always click 'detect displays,' and it fixes it, but the next time I wake the computer from sleep, it does it again. This isn't really an urgent problem, but I would expect my computer to behave a bit better for me.
Thank you in advance for any aid you might give me.
Lisel

Hi Lisel. I have a similar age MacBookPro that does the same thing. I don't really know how to fix it I'm sorry, I wish I did cause it's annoying. I just thought I'd let you know you're not the only one with this issue.
Basically, for some reason it thinks it has two displays connected, even when there isn't. To stop it being a total pain, make sure when it does come up with the two Display Pref windows to set them both to 1440x900, at least then when it does go dual display it won't be 640x480 and you can still read stuff.
I've also left the Display Pref icon on the top tool bar (next to the AirPort and Bluetooth and stuff), so I can just click that and Detect Displays. When it does that it figures out for itself it doesn't actually have two displays connected and so goes back to normal.
I know that's a workaround and not a fix, sorry. I'd be keen to know if anyone else has any better solutions:)
Thanks,
Mark.

10.4.7 kernel_task eats 70% of CPU only when computer wakes from sleep.

On my machine (FW 800), 10.4.7 caused: machine to slow perceptably after wake from sleep. Activity Monitor tells me kernel_task is consuming hundreds of times it's normal CPU cycles.
I installed a FRESH 10.4. Imported my files and folders. Upgraded all the Apple software EXCEPT 10.4.7 combo updater. The partition worked fine, before and after sleep. Upgraded using the 10.4.7 combo updates.
Again, kernel_task consumes 60-70% of CPU cycles after my Mac wakes from sleep. Note that it works fine when first rebooted.
As slow as it was, it was unusable. I reverted to 10.4.6 to get work done.

I have the very same problem on the same platform, except that I have 2 int. bootable disk drives. One boots 10.4.6 and has no problems at all. The other Boots 10.4.7 and operates perfectly, as far as I can tell from a few hours of use. It will continue to work just fine until I put it to sleep. On awakening, the Kernal Tasks CPU Usage jumps to 55% - 75% and does not decrease any further (ever). Restart or Shutdown restores perfect operation after reboot (but don't let him fall asleep).
I have repeated this dozens of times, with identical results.
The update was performed by the book. External devices disconnected, permissions repaired, disk verified by Disk Util. and DiskWarrior and the 10.4.7 combined update was used. Permissions and Drive Verif. was repeated after sucessful install. In my case, no other apps were effected. No Sys Errors were logged, No crash events, no Kernel Panics.
There are thousands of Sys Config combinations involving both hardware and sotware. This looks like a flawed release on this hardware. "Updater Beware", especially the first month after a major release like this. Look for a fix very soon.
Even so, the people at Apple have done extremely well over the last few years.
I know, because I work with a dozen or more Generic PCs and there has never been a trouble free update from the other side.
Having a second internal hard disk with identical OS and applications is like having a second computer in the same case. It is also a good idea to use backup software to auto-sync your user files in realtime. You can boot from one while repairing the other etc.

When I close the lid on my retina MacBook Pro with Thunderbolt and it goes to sleep, I cannot wake it without shutting it down and restarting it. Called Apple tech and they did not have a solution. Any ideas?

When I close the lid on my retina MacBook Pro with Thunderbolt and it goes to sleep, I cannot wake it without shutting it down and restarting it. Called Apple tech and they did not have a solution. Any ideas?

Try these places:
MacBook Pro
https://discussions.apple.com/community/notebooks/macbook_pro
https://discussions.apple.com/community/mac_os?view=discussions
http://www.apple.com/support/macbookpro
Mac OS X Help
Isolating Issues in Mac OS
http://support.apple.com/kb/TS1388
https://www.apple.com/support/osx/
https://www.apple.com/support/quickassist/
http://www.apple.com/support/mac101/help/
http://www.apple.com/support/mac101/tour/
Get Help with your Product
http://docs.info.apple.com/article.html?artnum=304725
TimeMachine 101
https://support.apple.com/kb/HT1427
Mac OS X & Mountain Lion Community
https://discussions.apple.com/community/mac_os
https://discussions.apple.com/community/mac_os/os_x_mountain_lion?view=discussio ns
Recovery Mode
http://support.apple.com/kb/HT4718

Computer won't start & fails to wake from sleep

First post -- I have a 2009 HP Pavilion Elite w/Windows7. Good box & OS, never a problem until now. Started about a month ago w/the box not waking up from "sleep" -- no response (power light turned from amber to blue as usual but nothing else happens). Had to turn it off, but then won't come back on! After 10-15 minutes of repeated power-on button presses, it starts back up. Removing/reinserting the power cord during trys doesn't help. Occasionally it starts right up from sleep, but usually has this problem. Windows7 is up-to-date and no viruses or malware detected. HP or Microsoft diagnostics show no issues.
I opened the box to clean out dust -- also took off the CPU heatsink (really dusty) & cleaned it too. Fans rotate easily & aren't an issue.
So now I have "sleep mode" turned off, but occasionly the box has to be turned off & afraid it won't come back on. I've seen some of the HP videos & will try shorting the two start-up pegs on the MBoard, but the power-switch was hardly ever used & I seriously doubt that's the problem -- it wouldn't have anything to do w/the sleep-wakeup problem. Any suggestions?

Hello @beng1,
I understand that your desktop computer is not able to wake from sleep mode, or power on intermittently. I would be happy to assist you in this matter!
To enable your system to successfully wake from sleep mode, I recommend following the steps in this document on Troubleshooting sleep and hibernate issues (Windows 7).
Additionally, I also recommend following the steps below to restore the power settings on your computer:
Step 1. Click the Start button
Step 2. In the search box, type "Command Prompt"
Step 3. Right-click Command Prompt
Step 4. Click Run as administrator
Step 5. At the command prompt, type powercfg /restoredefaultschemes and press Enter
In regards to the computer not powering on, I suggest following this resource on Computer Does Not Start (Windows 7). This should help enable your computer to consistently power on.
If the issue persists, please call our technical support at 800-474-6836. If you live outside the US/Canada Region, please click the link below to get the support number for your region.
http://www8.hp.com/us/en/contact-hp/ww-phone-assist.html
I hope this helps!
Regards
MechPilot
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the right to say “Thanks” for helping!

My password works fine when I turn the computer on, but when I try to wake it from sleep mode the computer doesn't recognize my password -- the same one I used successfully when I turned the computer on.

My password works fine when I turn the computer on, but when I try to wake it from sleep mode the computer doesn't recognize my password -- the same one I used successfully when I turned the computer on.

Okay, I seem to have solved the problem I posted about earlier. I noticed that the language preference in the upper right hand corner of the screen (between the date and time and the Spotlight icon) had somehow gotten switched from American English to French. When I switched it back to American English, my password worked when waking the computer from sleep mode. I have no idea why changing the language preference would affect the way the password works but that seems to have been the case. I'll post again if I experience more problems.

Cannot Wake Up Sleeping WI-FI Computer

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