IMac :: Pixelated Screen At Login And Kernel Panics
Oct 14, 2010
Got the iMac 27" Late 2009 (bought it when it came out). Its always had the 'pixelated' issue (see attachment) just before the login screen appears but I've never bothered too much as its not been a problem, until recently where I am getting a lot of 'Kernel Panics' (screen wipes down and locks done entirely, have to restart to get the system up and running again). I am starting to think that the screen issue is finally starting to shows its true colours. Yes, I've done the PRAM resets, disk repairs, up-to-date with all the software etc. No joy.
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Dec 17, 2010
Kernel panics have been quite often lately but only when play World of Warcraft. It would just happen randomly while not doing anything extensive, anyone else having this issue?
Interval Since Last Panic Report: 445236 sec
Panics Since Last Report: 5
Anonymous UUID: 409BBAE9-3DFB-4381-B130-276656A286DA
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Apr 10, 2009
My computer is having constant kernel panics. I have had about 10 in the past 18 hours, and I am starting to freak out about it. Here is the info from the error report:
BSD process name corresponding to current thread: firefox-bin
Mac OS version:
9G55
Kernel version:
Darwin Kernel Version 9.6.0: Mon Nov 24 17:37:00 PST 2008; root:xnu-1228.9.59~1/RELEASE_I386
System model name: iMac5,1 (Mac-F42786A9)
The part that says BSD process name corresponding to current thread has changed every time. When I have apps open, it will read the name of the apps extension but if I don't run anything it will say "system kernel" or something.
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Aug 9, 2007
Yesterday a friend gave me a really nice 17" iMac G4 he was planning to throw out because it was having problems. I would really like to get this working and would potentially be willing to buy parts to repair it. I have a significant amount of Apple hardware experience, but would like to get the opinions of people who may be more familiar with iMacs than myself on these forums. The problem is that the computer has random kernel panics. Sometimes it occurs as soon as the computer is turned on, sometimes after it has been on for a few minutes, sometimes after a few hours. So far, I have replaced the RAM with known good sticks, have replaced the hard drive with a tested good one from my collection (and these were both upgrades to boot!) and I have re-applied thermal paste (Arctic Silver) to all key components (CPU, ends of heatpipe, GPU) but to no avail, I still have the same problem.
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Jul 14, 2009
Our 1st gen 24" iMac was giving us Kernel Panics under Tiger 10.4.11 recently it all started two months ago. We took it into the Apple store for a Cleaning and fresh install of Leopard.
When we received it back it locked/froze up immediately, forcing a hard restart. When I called the store they said one of my sticks of ram was not techinically bad but still suspect. This is what I did after that call.
1. Checked the ram physically (the Apple store had placed my 512mb Apple ram stick in slot 0) which I thought very strange.
2. I corrected the ram, meaning I put the 2gb (suspect) stick in slot 0 and the 512 Apple ram in slot 1. Things were better it would take 10-15 minutes of use before locking up not 1-2 minutes.
3. I placed a new stick of Crucial (2gb from OWC) in place of the supect stick. that has had ZERO affect, our mac still freezes.
4. I pulled out the 512mb Apple (Micron) ram and replaced it with a 1gb Micron stick from OWC and that gives us roughly 20-40 minutes of time befroe freezing.
The software is up to date, I've max'd out the ram (new ram per Apple's request) and all we have running is iTunes in the background to stream to AppleTV and a few tabs of Safari open when this locks up. Right before it freezes we notice lines arcoss the application windows almost as though there a distorted pixels. When we took it in (running Tiger) the Apple Tech did check the drive and boot from their network and said our HD was not the issue, but it wasn't up long enough to cause kernel panic.
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Feb 5, 2010
Late 2007 MBP 15" kernel panics upon boot up and requires two /sbin/fsck -fy filesystem checks in single user mode/safe mode in order to get it to boot. Once you are at the login screen, it hangs after a bit/login and the screen starts flickering fast and visibly. There is also a faint visible "blotch/ink blot" like transparent area on the screen when it flickers (just to let you know, the screen looks FINE, no black blots (common for broken LCDs) and there does not appear to be any physical damage.
Anybody know what the heck might be going on? So far, I can already tell you that I DON'T KNOW if the machine was dropped or what the user did do to it (I'm only fixing it).
Also, during the fsck, I commonly get this: "Incorrect block count for pcscd.pub" it should be 16 (or 17) which gets me scratching my noggin (googled it, not much that I was able to do to fix the machine though). Fsck fixes that, but upon the next reboot after the kernel panic, I get it again in fsck.
We called the machine but of course when it was not bought the AppleCare was not registered (even though we bought it for the user) so right now we're waiting for Apple to register it (had to fax the receipts/POs) which usually in my experience only took few minutes to complete before we can even take it to the store.
My questions are:
1.) What is going on.
2.) Hardware problem? Bad Logic Board/GPU? Hard drive going bad?
3.) Software issue? Reinstall OS X?
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Jun 21, 2012
So out of nowhere my unibody MBP (specs, etc below) locked up yesterday while I was watching a video using VLC. It stopped responding to anything so I held down the power button until it turned off. I waited about 10 minutes and turned it back on. Grey screen with spinning cog showed up for about a minute and then kernel panic. Held down power button until it turned off. Tried repeatedly - same results. Won't boot into Safe Mode - still get a kernel panic everytime. It will let me boot the machine into Target Disk Mode. It will boot from my Snow Leopard install disk where I ran Disk Utility and "repaired disk" and "repaired disk permissions" on both the drive and the volume. All the "repair disk" and "repair disk permissions" ended with messages in green type saying that the disk/permissions appear to be OK.
I have an external FW drive used for TM backups for the machine. A fair amount of data has been added since the last TM backup (which was less than 30 days ago) that, ideally, I'd like to not lose by resorting to restoring from a TM backup. It's not the end of the world if the last (roughly) 30 days of data/changes ends up being lost, but I'm willing to work on getting it back up and running without doing an erase and install and then restoring from a TM backup if at all possible.
Definitely if any other information or data is needed from me in order for anyone to assist, please let me know what it is and I'll do my best to provide it.
Hardware Overview:Model Name: MacBook ProModel Identifier: MacBookPro5,1Processor Name: Intel Core 2 DuoProcessor Speed: 2.66 GHzNumber of Processors: 1Total Number Of Cores: 2L2 Cache: 6 MBMemory: 4 GBBus Speed: 1.07 GHzBoot ROM Version: MBP51.007E.B06SMC Version (system): 1.41f2
[Code]...
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Sep 30, 2010
I have a 24" iMac which is just over 12 months old. I noticed recently that occasionally the iMac emits a short burst of grey noise, a sort of hissing which distorts whatever sound is being emitted at the time, (music or whatever). This happens at no particular time and when running no particular program. I have tested it with external speakers and also headphones to confirm that it is not the built in speakers that are causing the problem. The sound burst usually lasts just a couple of seconds. It is not particularly loud and is something I can live with. Also recently the same machine has suffered from occasional kernel panics. Usually after being on for some time. Again at no particular time or process. If I restart the computer it often panics again.
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Nov 12, 2010
I have a feeling I need a new motherboard to replace my graphics chip. I was playing World of Warcraft last night when the entire computer froze and a pink grid came over the computer. Could not force quit. About 10 seconds later, Kernel Panic screen and I have to hard reboot. Every time I reboot the pink grid is still there and it kernel panics, does not get past the spinning Apple logo. I was able to hold down shift and get it to safe mode, and was able to back up my files that way. I also ran the Apple hardware test, but it said no problems found. I am typing to you now in safe mode on this pink screen.
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Apr 14, 2009
I purchased an imac g5 on ebay about 2 months ago. She said it's an older computer that is in good working condition except it may need restarted a few times every now and then. Everything worked fine for the first few weeks.. but now when I try to power it up it makes a loud crackling noise and freezes. After about 5 or 6 times of restarting it I can finally get it to start up correctly. But then my applications quit unexpectedly all the time.. especially safari.. and illustrator and indesign a lot too. I ran the extended hardware test and it fails on the memory.
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Jun 24, 2014
Recently, tried leaving my iMac in sleep mode for hours but it keeps crashing with those Crash Reports popping up when I click to wake it. They mention Kernel Panics.(Also, been getting Kernel Panics randomly popping up when I start up at the desktop. This is a 2010 iMac which I purchased refurbished not quite a year ago Already emailed seller with issues, think I might just return it as seems like hard drive is going. , as to troubleshooting before I go this route?
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Dec 4, 2008
This is the image I get on my iMac 2.4 GHz Intel Core Duo OSX10.5.4. I have repaired permisions and removed all login items. Once I move the cursor or open up a window the screen clears behind the cursor or window etc... It freezes up at least once or twice a day...
I started up again and attached another screen, the image was normal on both screens. But alone the iMac still starts up with the pixelated screen.
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Oct 30, 2010
I own an early 2008 iMac running Snow Leopard. A few months ago, it started getting a little buggy and running slow, you know, things you would expect from a computer that's now 2 years old. But then it started freezing and giving me "kernel panics". Of course, the first thing I did was install VirusBarrier and remove any and all viruses it could find, and I repaired the disk and disk permissions and ran all the diagnostic tests from the install DVD. Then I left it unplugged for a day, upgraded the memory from 2 GB to 4 GB and did everything a second time. After all that, everything seemed to work just fine.
Now it seems to be starting all over again! This time the virus scan only picked up a few Windows viruses on an old external hard drive and repairing the disk, disk permissions, and running diagnostics turned up nothing. I've done everything I know to do, short of taking the thing back to Apple! Right now, the main issue is this bug at startup that's really just freaking me out. Linked is a video of what happens. The apps that run at startup are BumpTop, HughesNet Status Meter (as of last month), and Brother Printer Utility. [URL]
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Jan 21, 2009
Whenever I play HD movies on my iMac in full screen with QuickTime, you can always see the pixels, some are big some small, like boxes. Is there any fix to this? also this is a Aluminum mid level 20 inch iMac
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Jun 19, 2010
I have an iMac G4 running 10.4.11. (not intel). When I turned it on today, it was all pixilated, little white squares in between the colored ones. I can hardly make out what is on the screen so I can?t really choose anything using the mouse. Everything else seems normal except for the the screen.
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Feb 12, 2010
I think it's UNIX. Not too familiar with it. I have G4 powerbook. 4 years old. Tiger. I was surfing safari, when I got the wheel. Couldn't even click the desktop to activate the finder. Did a hard reboot. Now, the mac Icon comes up, then goes to a black screen, then to the MAC OSX start up window (bar doesn't move). Then a black screen with Darwin/BSD (new-host.home) (console) login: It just comes up with a line that ends with my user name and restarted then same thing happens.
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Jan 14, 2010
I have a late 2006 24" IMac which has a myriad of issues. The most concerning to me at this point is the occasional appearance of a 1-2 pixel wide horizontal line which runs from 2" across to sometimes as much as 12" across the screen. It happens most often on the desktop and in firefox. It disappears as mysteriously as it appears.
Could the graphics card be going bad? Any ideas on what might be happening and how I might be able to solve this.
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Nov 18, 2010
I tried to locate /Library/Logs/PanicReporter according to this link to no avail. I'm not happy with logging using verbose mode and having to retype it all up. I also don't have it in a network of macs to allow for this technique and I feel as if there's a pretty obvious way of capturing these reports that I'm missing.
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Jan 9, 2011
I have had the Macbook air 11.6 for five weeks now and it has been rock solid except for a couple of kernel panics. Once when I first got it I got a kernel panic in Safari. I only use google browser now. I got a kernel panic two days ago. I went to open the lid and it did not come on. I found out there was a kernel panic. I am afraid if I take it to the genius bar they will have me reinstall the OS and add one app back at a time to see what is causing it but since they are so infrequent this is obviously not convenient. Also I have had my IMac 24 for three years and have tons more junk on it and have never got one panic.
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Sep 8, 2009
Can kernel panics on one machine somehow cause panics on another machine. My situation, I recently started using a BC338 esata card in my mid 2007 MBP running Leopard. Never had panics before but since trying to use this card with an esata drive I've had 5 kernel panics. I also have a Mac Mini running Snow Leopard which has had two kernel panics during times when the MBP had panics. Can these be related? Before using this card, I never had panics on either machine?
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Nov 14, 2009
This morning my Macbook encountered 3 kernel panics within 5 hours. Here is the log:
Sat Nov 14 13:47:44 2009
panic(cpu 1 caller 0x2a7ac2): Kernel trap at 0x0103d710, type 14=page fault, registers:
CR0: 0x8001003b, CR2: 0xffffff91, CR3: 0x00100000, CR4: 0x00000660
EAX: 0x4fd4bcc8, EBX: 0x00000000, ECX: 0x615d0000, EDX: 0x07867000
CR2: 0xffffff91, EBP: 0x0793c300, ESI: 0x00000003, EDI: 0x00000000
EFL: 0x00010206, EIP: 0x0103d710, CS: 0x00000008, DS: 0x00000010
Error code: 0x00000002
BSD process name corresponding to current thread: kernel_task
Mac OS version: 10C540
Kernel version:
Darwin Kernel Version 10.2.0: Tue Nov 3 10:37:10 PST 2009; root:xnu-1486.2.11~1/RELEASE_I386
System model name: MacBook4,1 (Mac-F22788A9)
System uptime in nanoseconds: 3940362197226 ....
From the log, can anyone tell me what's causing the kernel panic?
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Nov 23, 2009
What does it mean when a kernel panics? People talk about it all the time, what does it mean?
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Apr 3, 2010
I am currently planning to upgrade my 2gb RAM and I heard that my model supports up to 6GB of RAM, hence I am planning to upgrade to that size cause Aperture uses lots of memory and I use Aperture a lot. I am planning to get it from here: OWC 6GB PC5300 DDR2 667MHz DIMM Upgrade Kit. Everything is cool and all until I find out that some users are having kernel panics on OSX 10.6 with 6GB RAM (which is what I am using). It is now 10.6.3, so anyone care to report if it is safe to use 6GB or the problem still exist?
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Apr 7, 2010
Haven't had panics before but that's 2 today so far. Running 10.6.3 on 13" MBP.
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Apr 20, 2010
I've been having a lot of Kernel Panics (you need to restart black screens). I've only just worked out that they almost always occur after the mac has been dormant. For instance, I'll leave the machine on (and the black screen/sleep mode activates instantly), after twenty minutes I come back to the machine, it comes back to life, but within a minute or so it crashes. This seems to be the pattern, it very rarely crashes mid-use. Safari is also nearly always loaded?
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May 16, 2010
I have some problems with my macbook 4,1 (early 08). Since a few weeks I get sometimes kernel panics. Last night I had 7 kernel panics within 1 hour. Can anyone help me analysing these logs? memtest86+ doesn't show any problems after 8 hours.
http://pastebin.de/6527
http://pastebin.de/6528
http://pastebin.de/6529
http://pastebin.de/6530
http://pastebin.de/6531
http://pastebin.de/6532
http://pastebin.de/6533
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May 10, 2012
I kid you not, ever since I updated 10.7.4 last night, I've had at least 3 kernel panics, plus it wouldn't wake up from sleep.
Sometimes it seems to crash for no reason at all -- the computer will just be sitting there and I won't be doing anything; granted, I'm sure a skillion processes are running, but no more than I would usually run.
Where are the pertinent logs hiding so I can share them with some wise soul?
Info:
Mac OS X (10.7.4)
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Oct 10, 2007
Last week, after completely normal use, the computer booted up to a screen with the finder icon / flashing question mark. After a few more atempts to power up i started getting just the grey apple screen with spinning wheel and loud fans. I was advised by a friend to boot from the install DVD by holding alt when powering up. When i try this, after selecting the DVD from the boot up options, I get kernel panic and the message " panic: We are hanging here...". Then nothing.
Information:
G5 Dual 2.0
Mac OS X (10.4.5)
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Apr 8, 2008
I've been using my new Mac Pro with no issues for several weeks with the same hardware setup & OS all along. Suddenly I'm getting kernel panics. It happens when I startup from the system drive or from install disc. And sometimes when I startup it just hangs on the blue screen with no desktop coming onto the screen. It started happening after I did a Carbon Copy Clone of my system drive onto a firewire drive, & when I came back to my computer several hours later the screen was black & white stripes. I've been on the phone with apple care several times and even took my machine to the genius bar today where they recommended a stress test and said I would get it back in 5 - 10 business days (gasp!). Of course there were no kernel panics while I was there (for an hour, and at home I'm getting them every few minutes), so I decided to take it home & check it over myself in a process of elimination.
I've removed all third party ram, and have 2 hard drives installed - the system drive & the drive I use for time machine. The RAM is listed as OK in system profiler and the HD's are verified with Disk Utility - also disk permissions verified & repaired on the system drive. I have 2 Acer monitors - model AL2016W. I tried plugging in one at a time in each DVI port for a total of 4 tests - each with a fresh startup. There were no kernel panics. Then I plugged them both in at the same time, started up, & got the kernel panics. Tried this twice with the same results. With or without any applications open, it's the same. Within 2 - 4 minutes I get a kernel panic when both monitors are plugged in. Later, I got kernel panics with just one monitor connected. So my question is; What could be the reason it's getting kernel panics sometimes & sometimes not? As I said, nothing has changed in my setup since I got the machine - and everything was running fine since mid February.
During my testing I have these connections:
One or two monitors. Power cord. Apple wired keyboard & mouse (these were not connected at the time this started happening so I have eliminated them from the possible source of trouble.) All bluetooth devices are powered off & no other external devices are connected. I just completed the Apple Hardware Test & it detected this error: "4HDD/11/40000004.SATA(0,0)" Does this mean there's something wrong with a hard drive? If so, which one?
Mac Pro Early 2008 2.8 Mhz 8 core
OS X 10.5.1
2 gigs original "apple" RAM
HD 1 - Samsung F1 (system - 750 gigs of which 420 are being used)
HD 2 - Hitachi (time machine - 1 TB)
2 Acer monitors DVI
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Feb 10, 2009
I have become increasingly frustrated and angry at my MacBook in the last few weeks. Nearly every time I plug in a USB hub, I get a kernel panic. When I send the report to apple, this is what comes up near the bottom of the window:
Code:
Backtrace continues...
Kernel loadable modules in backtrace (with dependencies):
com.baltaks.driver.DoubleCommand(1.6.5)@0x3441b000->0x34420fff
dependency: com.apple.iokit.IOHIDFamily(1.5.3)@0x709000
com.apple.iokit.IOHIDFamily(1.5.3)@0x709000->0x741fff
Sometimes there's a USB HUB written in there. What is going on? I've tried switching from a rather generic hub to a Belkin one, and most recently I just plugged in my aluminum keyboard and immediately got a KP. They've been happening with regularity over the past while, all when I unplug or plugin my USB hub with an iPod touch, keyboard/mouse, USB drive and headset (though recently I've been removing peripherals). I'm about to do an archive and install (assuming my MB works long enough for me to download the combo updater) but want to kill this bug soon.
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