Kernal_task 100% after wake up

hello my mbp battery went bad after i noticed that kernal_task using 100% of one of cpu core, that usually happens after it wake up from sleep. i searched for solutions but the problems still occoured so is this a bug of maverick? or did apple say anything about this? n other effective solution? thx

I'm not seeing anything, besides kernal_task, that is out of the ordinary.
Spotlight will show a dot in the center of the magnifying glass in your toolbar. If you click the magnifying glass, it will display information about how far along in the indexing process (if it is indeed indexing. If it isn't indexing, it will only display the search field)
I posited bad RAM because that might cause issues. I doubt it though. How large is your internal drive? At this point, I feel it has something to do with a bad migration. I would try to add a 2nd partition to your boot drive and do a clean install of Leopard on it (minimum install, you don't need to install printers, etc.) If your drive is large enough (at least 15 GB free), launch Disk Utility and select your boot disk (not volume, the boot disk will have some numbers beside it and not Macintosh HD.) Next click on the Partition Tab. On the left side of the Partition tab there is a graphic for the Volume Scheme, click on the little '+' sign on the lower left. You can drag the slider in the middle of the graphic to size the 2nd partition. Click Apply. Proceed to install OS X from your install disks to this 2nd partition. If the system performs normally on this 2nd partition, we know your primary OS has something in it that is causing problems. If it behaves the same as the primary, we probably have a hardware issue (I doubt this.) If the 2nd system works properly, I would get an external hard drive, clone your boot drive to the external using either Carbon Copy Cloner or Super Duper! (Boot the external clone to make sure it works) Re-partition and Erase your internal drive and do a clean install on your internal. You can then try to migrate your settings from the external at this point.
Let me know...
D.

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MacBook Pro Retina Mountain Lion + Dell U2713hm hangs after wake-up

This is a more specific description of my problems here:
https://discussions.apple.com/thread/4385171
I use a Dell U2713hm together with a MacBookPro Retina under Mountain Lion. The Dell is connected via the Thunderboldt to DVI-D adapter that is sold by apple. The Dell has a USB 3 Hub. The upstream is connected to the Apple-DVI adapter. I use a mouse and a Logitech keyboard, which are connected to the Dell USB hub.
The display blanks from time to time for some seconds, which is suboptimal and I would be greateful if this could be fixed. But the biggest problem is that the system hangs after wake up. Sometimes the external monitor just stays dark, sometimes I get the login screen, but cannot type since the swapping wheel is shown. I have to reboot the machine.
To me this looks like a USB(3) sync problem.
If there are any ways around this I would be really glad. Is there a way to disable USB3? I also noticed that the speed of components that is displayed in the system profiler depends on the ports I use for keyboard, mouse and camera ...
Thanks!

The solution is to dump the 100€ mini-display port DVI-D adapter that apple sells and buy a mini-Display to Display-Port cable for 6€. No crashes, no annoying interruption of the display (which I had several times the day for 2 or 3 seconds). There are very short interruptions now, but it is much better than with the apple adapter. The apple adapter needs a USB port, which is not necessary with the simple cable.
As for the monitor: Burn In, otherwise great. The burn in can be erased via monitor menu but should not be there in the first place.
Hope this helps.

MBP takes long time to restore wired network connection after wake-up

Hello...
My Mid-2010 MBP (MacBookPro6,2) has been experiencing this problem recently -- Whenever I wake up the computer from sleep, it needs approximately 10 seconds to restore its wired network connection. I know there are other annoying connection issues with MBP's WiFi/AirPort out there, but I'm talking about the wired connection here.
Maybe some don't even think this slowness is a problem at all, but this laptop used to be network-ready right after wake-up until 3~4 months ago. That was around the time when I upgraded to SSD and changed some settings via pmset, not sure if that's the culprit. It is now running OS X 10.8.5 and its pmset settings are:
Battery Power:
lidwake              1
ttyskeepawake        1
hibernatemode        3
gpuswitch            2
hibernatefile        /var/vm/sleepimage
displaysleep         2
sleep                15
acwake               0
halfdim              1
sms                  0
lessbright           1
disksleep            10
AC Power:
lidwake              1
ttyskeepawake        1
hibernatemode        0
gpuswitch            2
hibernatefile        /var/vm/sleepimage
womp                 1
displaysleep         10
networkoversleep     0
sleep                60
acwake               0
halfdim              1
sms                  0
disksleep            0
I'd appreciate help of any kind
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zuoy

Maybe try this, i am not sure that it will resolve the problem, but it is worth trying anyways.
http://social.technet.microsoft.com/Forums/en-US/w7itpronetworking/thread/eef49e64-157c-4082-8e80-52e48309691f
Hi All,
I've seen this problem multiple times, especially with Windows 7 64-bit versions and Enterprise edition. The source of the problem appears to be the Bonjour service that is installed in the background and set to "Automatic" when installing certain 3rd
party applications. Apple applications like iTunes and Adobe applications like Acrobat Professional and Creative Suites have been known to cause this problem. I've also seen virtualization software like VMWare and VirtualBox cause similar issues
with network adapters.
The solution in most of the cases I've come across has been to stop and disable the Bonjour service. The Bonjour service also masquerades as a service with a name of the format "##Id_String1.6844F930_blahblahblah". Here's how to disable this service
in Windows 7:
Right-Click on Computer > Select 'Manage'
Expand the 'Services and Applications' section in the bottom of the Left-Nav dialog and Select 'Services'
Sort the Services list by name and look for either "Bonjour" or the "##Id_String..." name mentioned above
Right-Click on the service and select 'Properties'
Click the 'Stop' button to stop the service
Select 'Disabled' from the 'Startup type' drop down list
Click 'Apply' and then 'OK'
Reboot your machine and see if the "Multiple Networks" issue is resolved. If so, you should have internet connectivity again.
Hope this helps.
cheers,
Aaron

After update to OS X 10.7.5 on my Mac Pro (2009) USB ports don't work at all after wake up from sleep mode; with 10.7.4 there was (nearly) any problem.

hello,
after update to OS X 10.7.5 on my Mac Pro (2009) USB ports don't work at all after wake up from sleep mode; with 10.7.4 there was (nearly) any problem.
the used ports appear to be "killed"; the unused USB ports seem to work, but the Mac works in slow-motion.
The only "solution" is to restart my Mac.
- SMC-reset, PRAM-reset or repairing user rights had no positive effect; what is the solution - a bug-fix-update???

I have a mac mini (A1283) with OS 10.7.4. Upon upgrading to 10.7.5 it did not start up again. Instead, the light was on and the hard drive did not start up. The light on the connected USB mouse was not lit.
My solution:
Cold start with Command-v pressed.
This should start Verbose mode (see http://support.apple.com/kb/HT1492 ).
What happened on my mac mini was that the grey startup screen with the Apple logo appeared for a long while before the login screen came.
Maybe Cmd-v set open firmware params and fixed some corruption.
Anyway: my mac mini works again.

Force external drive to remain in stand by after Wake up

I have a WD My Book external drive connected to my iMac 27" via USB 3.0
The drive is initially in a stand by mode (drive doesn't spin, it's visible in disk utility).
Now when backup script starts, it first checks to see if drive is mounted. If it's not it then mounts it (drive begins to spin), then the backup process starts, and lastly the disk is ejected (drive stops spining, it's again in standby)
All this works, however my problem is when my mac wakes from sleep, drive automatically starts to spin and is mounted. I want the drive to always remain in stand by except from when it is manually mounted.
How can I achieve such a thing? I have tried the folowing:
Disabling the USB Mass storage: requires restart and results in all USB ports being disabled, which is unaccepted
Setting the drive to "Power up in Stand By feature" with linux command "hdparm": Even tho hdparm says the disk supports this feauture, I've got I/O error
Setting the jumper to proper position to enable PUIS: the white lid is switched on, but nothing happens (not visible in disk utility)
Adding the line in /etc/fstab to prevent auto mounting, which partially works. (drive still spins after wake up)

Thanks for your reply.
There is only the spinning wheel in the finder sidebar when it is actually backing up.
Not after it has finished according to the progress bar in TM Preferences. When that has finished, the Hard Drive just carries on gurguling and ticking.
Until I drag the volume icon to the trash then it stops. AND I have just noticed the wheel starts spinning in the finder window after I have done this and it starts backing up again. It does not eject but I get a notice saying " Is in use could not be ejected. Try quitting applications and try again." (well I do have applications open). Then after this back up all is quiet. But the cycle starts off again after the next sheduled backup starts.
I can not see anything called backupd in activity monitor while the noise is current.
The only activity seems to be from "Activity Monitor" "Finder" "System Preferences" "SystemUIServer"
In 'Console' under All Messages it says Backup Completed succesfully. followed by
kernel............SetCryptoKey R: len 32, idx 1
Sorry I can't make things any clearer.

Mouse settings don't stay as selected after wake-up

I am having a weird issue with my mouse tracking settings. I want them to be fast (all the way to the right), so when I got my Mac 4 years ago I set them that way.
For a week now they "jump back" to about medium speed after wake up. I have to go back and manually change it back to fast again.
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Sorry one corrections I am running the latest OS X all my software is up to date

BUG: Sandisk USB flash drive in "half-mounted" state after wake from sleep

My Sandisk Cruzer Crossfire 4GB Flash Drive is left in a half-mounted state after wake from sleep. The Finder believes the drive is still mounted, the icon is on the Desktop. However opening a file on the drive, or trying to eject the drive, results in a long beach ball, followed by a message that I removed the drive without Ejecting it first. The same drive continues to work fine on my Tiger machine, and on PCs.
Bug Report:
Setup:
Macbook 1st Gen (2.0 Ghz)
Mac OS X Leopard 10.5 Clean Install
Sandisk Cruzer Crossfire 4GB USB Flash Drive (in either port)
Repro:
Plug in the drive.
Close the MacBook to put it to sleep
Reopen the MacBook
Result:
The lights on the flash drive never light back up after wake from sleep. Navigating the drive, or trying to eject it results in a "you removed the device without ejecting it first" message.
Expected:
Drive should still be mounted and accessible after waking back up.

It may be a design flaw in the device. Mac OS X does a lot more power management than most other OSes, including tearing devices down to little or no power during sleep. It is possible that the device simply misbehaves due to corrupted memory state or reports a substantially different GUID or something similarly bizarre upon wake. (Okay, that last one wouldn't technically be a power management issue....)
If it doesn't have any problems except when sleeping the system, I would just make sure I unmounted it before putting the machine to sleep and wouldn't worry about it. Maybe check with Sandisk to see if they have a firmware updater for the device.

Airport issue after wake from sleep (lion)

With 10.6, this was not a problem. With Lion, very often after wake up from sleep mode, the system is unable to reconnect to my airport extreme base station. Killing the prefs in the library did not help. Any suggestions?

My wife's Macbook has EXACTLY the same problem and I've been through dozens of suggestions trying to fix it and the problem still persists.
The problem started right after I upgraded to Snow Leopard but also installed an Airport Extreme router and WPA2 wireless encryption. I've deleted all the networks, changed the order to put the Airport as the highest preference, deleted all the keys on the keychain, ran DiskUtility, all to no avail.
I'm not sure if this is somehow related to the Airport Extreme or occurs with any router. Also, have another MacBook Pro (unibody), and it does't have this problem connecting to the same Airport Extreme.
The other factor is it is intermittent --- and doesn't always fail. Rebooting the Macbook or the router will get it to re-connect, as will shutting off and turning on the Airport several times. But that's not a solution to the problem.
Apple needs to pay attention to this as many people are now reporting the problem.

My Mac Pro loses network connection after wake from sleep since Yosemite upgrade.

Mac Pro loses network connection after wake from sleep since Yosemite upgrade. Any one have this issue as well. And is there a work around?

Wi-Fi?
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Wi-Fi Problems in OS X Yosemite (2)
Wireless Diagnostics
Also try turning off Bluetooth.
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After update to 10.7.1, Wifi retrieved after wake up from sleep?

Anyone who had "no wifi after wake up from sleep @ MBA 2011 " issue before, is this fixed after 10.7.1 update installed? Any tester please drop your comment.

In another Mac forum saying that after the 10.7.1 update, need to reset the PRAM to get this issue solved.

5.0.1 my iPhone battery seems to be better...still showing 100% after 1 hrs standby and 15 mns usage

5.0.1 my iPhone battery seems to be better...still showing 100% after 1 hrs standby and 15 mns usage

Do you have wifi syncing turned on? Is your itunes always open?
There is a glitch with the iPad where, as long and anytime iTunes is open, it'll sync...like once an hour or some such rate.
Originally the wifi syncing was only supposed to take place if the device is plugged into power, but that's not the case. If I have my iTunes open my iPad will try to sync almost continuously.
So check your wifi sync and iTunes settings (my iTunes used to be set to open automatically when the device is connected, I had to change it to only open when I do it manually because in the course of an evening's surfing my iPad opened my iTunes and started to sync three different times until I turned it off)
If you have iCloud syncing enabled that may also be contributing to your battery issues. I don't sync over iCloud, I tried it but after it ate all my contacts, I stopped using it. However, if the same glitch is present, the device trying to continually sync even when not plugged into power, that could also be part of your drain.

After installing Mountain Lion on my MBP Retina, WiFi connection drops frequently (not happening to other devices around); it also takes a lot to reconnect after wake up.

After installing Mountain Lion on my MBP Retina, the WiFi connection drops frequently (not happening to other devices around, like on an iPhone); it also takes a lot to reconnect after wake up. Does anybody have a solution for this?

After installing Mountain Lion on my MBP Retina, the WiFi connection drops frequently (not happening to other devices around, like on an iPhone); it also takes a lot to reconnect after wake up. Does anybody have a solution for this?

Left USB-Port dead after wake from sleep. Just restart helps.

I hoped Apples keyboard-Update today would solve my biggest hate-bug in this buggy POS called Leopard. It didn't.
As usual on my Leopard-Macbook Pro, no device will work on the left USB-Port after I waked the computer from sleep. Just a restart helps. I hoped this update to solve this, because it replaced among others "IOUSBFamily.kext".
Terminal gives a timeout error for the internal USB-Hub after wake from sleep. I assumed this should be related.
I'm really angry now.
When will Apple solve the most urgent problems in Leopard?
Was 10.5.1 just smoke and mirrors to make (fool people into...) people upgrade who intended to wait until the first maintenance-update?
Was Leopard Apples attempt to make Windows-Users more comfortable by putting in some heavy extra-bugs and blue screens?
FIX IT FINALLY! And f... don't wait for Macworld to release 10.5.2. It's desperately needed and the current state of Leopard will leave some people very sad at christmas after getting their first Mac. First impression counts and many more peoples first contact with the Mac will be at christmas...

Apple knows the problem and for some reason they are stumped on fixing it. this is so bad I can't believe it. On my macbook pro with Leopard installed, USB left port is dead after sleep. Only restarting can power it back up. I have to restart every day to use my external hard drive for time machine or when putting my flash drive in the port.
Come on already Apple. This is a SERIOUS, SERIOUS problem.
Fix it.

Reconnect NAS after wake up

Hi,
If I set my Macbook Pro to standby mode and let it wake up again, the connection to the network drive in my network attached storage is lost. I have to reconnect manually using the apple-k command.
Is there a way to get these drives reconnected after wake-up automatically? This is definitely no issue with Windows - I wonder why it should not be possible on Mac.
(I am not talking about rebooting the machine, but about waking it up from standby - reconnecting automatically after a reboot can be done easily by adding the drives to my startup objects).
Thanks
Simon

Hi Tomasz
One question;
Do you speak about an external soundcard which is connected via USB to the notebook or do you speak about the inbuilt Realtek soundcard!!!
I know about a similar sound issue on Vista OS.
I have read in the Microsoft knowledge base about similar problems;
Please check this:
http://support.microsoft.com/kb/929685/en-us
Please provide more details if this patch will not help you!

T400 bluetooth doesn't turn on after wake-up from standby mode

Hello
Please help
My T400 doesn't turn on bluetooth after wake-up from standby mode
i need to enable it every time by hand.
Thing thing appeared after migration to Windows 7. Before, i used WinXp and that worked fine.
I setup all recommended software via SystemUpdate

On T400s this happend, if you try Linux to install and after that you install Windows 7. I have test Ubuntu (boot from LiveCD) and after that i had exactly sam eproblem. Solution was to reset BIOS to default values.
Lenovo T440s, 20AQ0067MC, Windows 8.1 Pro x64 UEFI, Samsung 840 EVO SSD 250 GB, 8 GB RAM
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Kernal_task 100% after wake up

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