Currently Being ModeratedMay 9, 2012 8:37 AM (in response to David Portela)
Changed title to increase range to later Snow Leopard updates, which also seem to have updated the NVIDIA kexts and thus, to cause this issue.
Currently Being ModeratedMay 9, 2012 4:58 PM (in response to David Portela)
I have the exact same iMac9,1, only with 4gb less memory than you do, and the exact same problems. I've been trying to identify the issue but no discussion seemed to match the specific symptoms I'm seeing, until I saw your thread.
I started getting the lockup when I had the pre-Lion up-to-date release of Snow Leopard, I thought it was an issue with Silverlight/Flash as it only seemed to happen when I was watching video. I installed Lion in hopes of remedying the problem, but it has made no difference. When I start seeing the mosaic/artifacts on my screen I know that a lockup is coming and I usually restart before I have to hard restart. I don't get a kernal panic screen I don't get anything, one moment the mouse is moving on the screen, the next it's not. On occasion if I am watching video, the sound will continue to play for a short time but everything else is locked down my only recourse being a hard reset. My uptime is terrible.
I also have Windows 7 dual booted, and also have no issues when in the Windows environment.
I just started turning off my computer whenever not in use because I was tired of it freezing up when coming out of a sleep screen.
Prior to Lion's release I ran the hardware test (I believe the option was removed with Lion) and everything showed up as okay. I've verified disk and permissions, and nothing indicates a problem. I have pretty much done everything you've tried and still have the problem. I'd love to see some feedback on our problem as it is very, very aggravating and I'm not yet in a position to upgrade computers. Is this at least a problem that will be addressed by Mountain Lion?
Currently Being ModeratedMay 9, 2012 11:52 PM (in response to David Portela)
Crashed again, this time while running screen saver. Here's the log:
Interval Since Last Panic Report: 258975 sec
Panics Since Last Report: 1
Anonymous UUID: 8A9BDB66-541D-4132-8BDD-D171D358B321
Thu May 10 03:48:23 2012
panic(cpu 1 caller 0xffffff7f8092a907): NVRM[0/2:0:0]: Read Error 0x0061002c: CFG 0x00000000 0x00000000 0x00000000, BAR0 0xd2000000 0xffffff80f3175000 0x094700a1, D0, P3/4
Backtrace (CPU 1), Frame : Return Address
0xffffff80f179bc80 : 0xffffff8000220702
0xffffff80f179bd00 : 0xffffff7f8092a907
0xffffff80f179bd90 : 0xffffff7f80a1aa64
0xffffff80f179bde0 : 0xffffff7f80c1e4dc
0xffffff80f179be00 : 0xffffff7f809e3673
0xffffff80f179be20 : 0xffffff7f80a8ba0a
0xffffff80f179be90 : 0xffffff7f809177d6
0xffffff80f179bf40 : 0xffffff7f808d143e
0xffffff80f179bf70 : 0xffffff800023db2c
0xffffff80f179bfb0 : 0xffffff8000820057
Kernel Extensions in backtrace:
dependency: com.apple.iokit.IOPCIFamily(2.6.8)[F63D4ABE-42DA-33EF-BADD-3415B0CB0179]@0xffff ff7f80846000
dependency: com.apple.iokit.IONDRVSupport(2.3.2)[4B3F84DC-18B3-3897-BC56-4E3940878047]@0xff ffff7f808b8000
dependency: com.apple.iokit.IOGraphicsFamily(2.3.2)[FE536983-1897-3D6B-965E-24B5A67080DA]@0 xffffff7f80880000
dependency: com.apple.NVDAResman(7.1.8)[94BA87BA-B128-3310-9860-98EC67AB7FAF]@0xffffff7f808 ca000
BSD process name corresponding to current thread: kernel_task
Mac OS version:
Darwin Kernel Version 11.3.0: Thu Jan 12 18:47:41 PST 2012; root:xnu-1699.24.23~1/RELEASE_X86_64
Kernel UUID: 7B6546C7-70E8-3ED8-A6C3-C927E4D3D0D6
System model name: iMac9,1 (Mac-F2218FC8)
System uptime in nanoseconds: 137075074753775
last loaded kext at 39719236478: com.apple.driver.AppleHWSensor 1.9.4d0 (addr 0xffffff7f81e72000, size 28672)
Currently Being ModeratedMay 10, 2012 9:57 AM (in response to David Portela)
After updating to 10.7.4, the issue still continues. In fact, here is a screen shot showing pixellation a few minutes after the 10.7.4 installation rebooted the machine (click the image to see the pixellation better):
Am I wrong or does this make it clear that this is a software issue? If it was a hardware issue, the system would be telling it to display one thing, and the hardware would be displaying another. So a screenshot should (theoretically) show what the hardware was being told to display. In this case, the screenshot also shows the pixellation, meaning the hardware is simply displaying what it's being told to. The bug is in Apple's NVIDIA driver.
Message was edited by: David Portela - added instructions to click image.
Currently Being ModeratedMay 10, 2012 11:20 AM (in response to David Portela)
Those are exactly the same artifacts I get. I downloaded the combo update of 10.7.4 and haven't had any problems as of this writing, but I also haven't used the computer much as I've been away. I left the computer on all night and will be working today so I should be getting something soon...
Currently Being ModeratedMay 10, 2012 4:25 PM (in response to Quasimoto)
...and here we go. After being away from my computer for a bit I got this weird computer glitch which I screengrabbed while in mission control. While opening said picture of mission control in photoshop, after a restart I might add, I got an entirely new set of weird screen gobbeldygook, including the multicolored artifacts that you had pictured.
Currently Being ModeratedMay 10, 2012 7:08 PM (in response to David Portela)
More lovely behavior this evening. I clicked my Applications folder to start up an app...instead of the App menu listing all the apps, Lion presented me with this pearl instead (poor screenshot because I was using Screens on the iPad to connect when this happened):
Notice how the menu is wrongly redrawn on either side of the actual menu. Now notice what is behind the menu...it is being redrawn sideways, and multiple times, superimposed over and over and over.
When I got to the iMac I could still move the mouse around. I took a screen shot and the screen shot sound triggered, but after a startup, no screen shot was found. However, before I restarted, I tried clicking around for a bit to see whether I could get the system to respond again. After about 20 seconds this is what I got:
After that I restarted and got no "Your computer was shut down due to a problem..." dialog, so supposedly it still hadn't actually kernel panicked, but was locked up anyway.
Currently Being ModeratedMay 10, 2012 10:10 PM (in response to David Portela)
I get exactly all these issues on 10.7 to 10.7.4 with my 3.06Ghz NVIDIA GT130 iMac setup. The tiny patches of purple and blue pixels, the stuck blocks, the purple blocks and even the flickering described in the video above.
Gah! Just waiting for the new iMacs and will send this one back to Apple for testing. I just can't do without my daily machine at this point to send it in, even after phone calls from Apple themselves.
Just wanted to add to the thread to reassure people it's not just them.
Currently Being ModeratedMay 11, 2012 9:16 AM (in response to David Portela)
I'm "suffering" the same issue with my iMac9,1, but mine has NVIDIA GeForce GT 120. It is really frustrating...
Has someone tried to run lion in 32 bits mode and see if this issue happens also in that case? I've not tried yet, but perhaps it's worth a try...
Currently Being ModeratedMay 11, 2012 9:32 AM (in response to Zahori)
Zahori and Anke, welcome to the club none of us wants to be part of! Zahori, your 32-bit suggestion is a good one, I'll try to reboot in 32-bit tonight and see if that helps.
Currently Being ModeratedMay 11, 2012 2:49 PM (in response to David Portela)
Another crash tonight, while editing video (this happens often). First the video looked really weird, with bright pixels in surrounding the edges of the speaker as he moved. I tried a screen saver reset and it appeared to work, however as I continued editing, I noticed more strangeness...the last thumb in iMovie had three horizontal strips displayed across it, each of which was zoomed into a specific part of the actual video (you can see the zoom-in on the tie, in the middle). I hit Shift-Command-3 and the screen shout sound started, but the computer froze completely at that point (and no screen shot was saved – I checked after rebooting). So I took a photo with my iPhone instead:
No prompt at startup. And pixellation began right again after opening iMovie, but has thankfully not crashed again yet. Hoping to make it through export without another crash...
Currently Being ModeratedMay 11, 2012 5:00 PM (in response to David Portela)
Out of curiosity were you running under 64 bit mode or 32 bit? I restarted under 32 and have seen no problems as of yet, but then again I've been on and off the computer all day.
Currently Being ModeratedMay 11, 2012 5:07 PM (in response to Quasimoto)
Haven't tried restarting in 32-bit mode yet, will do as soon as this video exports...if I don't get a crash before then. :-)
Currently Being ModeratedMay 11, 2012 6:19 PM (in response to Quasimoto)
Just rebooted in 32-bit mode and everything seems fine so far! Will keep testing and see if anything else occurs.