Q: OSX Lion + 2011 iMac 27'' + Video = Freeze

Looks like we will be taking a back seat to the problems Apple is having with the iPhone 4S.  They are getting right on that problem.  Perhaps we have to go public.

http://www.canada.com/technology/Apple+confirms+iPhone+battery+problems+promises /5652522/story.html

http://www.canada.com/technology/Apple+confirms+iPhone+battery+problems+promises /5652522/story.html

http://abcnews.go.com/Technology/iphone-4s-battery-issue-apple-investigates-batt ery-drains/story?id=14856911#.TrMm6CzDHMA

That is where the money is for Apple. Desktop Computers take a back seat. The profit is in the iPhone and iPad2. That is why they are solving the battery problem STAT! There are very few improvements in Lion to lure me to compromising my new iMacs. My Macs are running great with 10.6.8. In addition I don't like what they did with iCal,the sidebar in Finder which is now colorless,the way Spaces is in Lion and to me Rosetta is important.I have many PPC apps that can't be replaced.The top priority in Apple is iOS for the iphone and iPad2.The technical head of Engineering for Apple quit because he was not getting the support he needed.

I don't personally think that, because Apple isn't paying attention to desktop computers, then it won't do it anymore. In fact, every Apple desktop computer is SO evolved in comparisson with Windows PC, and what to say in relation to programs, that ANY computer is FAR AWAY from almost any program AND any Windows PC. I come from the Windows world, and I see that a PC doesn't perdures in time since they're "updating" their hardware almost twice per year while an early 2006 Mac Pro is a PERFECT computer. I have an early 2008 one and for the use I give to it, which is HEAVY picture editing, I just need more RAM, which is just that, RAM. There is almost ANY program able to handle ALL the power of ALL of the CPU cores and/or at near 100%. In fact, there are benchmarks comparisson between many types of Mac Pro's and guess what, none of the programs made by Adobe uses all the power of neither, 4 CPU cores, and even more, they work slower on a 12 cores Mac Pro because the architecture of the programs, which are not optimized for such hardware, nor for a 8 CPU cores. There are the benchmarks around the Internet, this is not blah, blah, blah. So who cares making faster and faster computers if programs still cannot handle the power of actual ones?

Something that reaches perfection doesn't need to evolve.

I'm getting the same exact symptoms on a 2007 iMac7,1 with an ATI Radeon HD 2400 XT that's running Lion.

11/4/11 1:43:26.000 PM          kernel          ** Device in slot: SLOT--1 **

11/4/11 1:43:26.000 PM          kernel          ** GPU Debug Info Start **

11/4/11 1:43:26.000 PM          kernel          0x000094c8

11/4/11 1:43:26.000 PM          kernel          0x000000d6

11/4/11 1:43:26.000 PM          kernel          0x00000001

11/4/11 1:43:26.000 PM          kernel          0x00000018

11/4/11 1:43:26.000 PM          kernel          0x0000d062

11/4/11 1:43:26.000 PM          kernel          0x00000001

11/4/11 1:43:26.000 PM          kernel          0x00000001

This continues indefinitely

Have narrowed down a "temporary" fix.  Every time my applications "hang", I open "force quite applications" window (command/option/esc), close that window without force quitting anything, and the hanging stops.  However, like Michele, I am having to do that every few minutes.  I'm afraid I'm going to wear the "force quite applications" window out!

For me, it turns out to be my router that conflicts with my 2011 iMac.  I experienced freezes while watching streaming video or after waking up the computer.  Genius Bar couldn't replicate the problem but my computer freezed again as soon as I tried it at home.  So I turned off my Belkin wifi and used the cable.  It no longer freezes despite hours of streaming video.  I now use airport wifi and so far so good.

My latest freeze, this morning. Still Lion 10.7.2, still an iMac 24" early 2009,

Graphics  NVIDIA GeForce GT 130 512 MB.

I was scrolling in Safari at the time - that's clearly a dangerous manoever these days! This time the screen didn't break-up, though, it simply froze instantly. So the symptomes change quite a bit.

06/11/2011 11:04:49.186 RFBEventHelperd SetEventTapFlag - Unable to stat /dev/console 13

06/11/2011 11:04:54.217 RFBEventHelperd SetEventTapFlag - Unable to stat /dev/console 13

06/11/2011 11:04:54.345 RFBEventHelperd SetEventTapFlag - Unable to stat /dev/console 13

06/11/2011 11:04:54.865 RFBEventHelperd SetEventTapFlag - Unable to stat /dev/console 13

06/11/2011 11:04:55.001 RFBEventHelperd SetEventTapFlag - Unable to stat /dev/console 13

06/11/2011 11:10:51.000 kernel  NVDA(OpenGL): Channel exception! exception type = 0x3 = Fifo: Unknown Method Error

06/11/2011 11:10:51.000 kernel  IOVendorGLContext::ReportGPURestart

06/11/2011 11:10:51.000 kernel  00000069

06/11/2011 11:10:57.413 sandboxd        ([5935]) DumpGPURestart(5935) deny ipc-posix-shm apple.shm.notification_center

06/11/2011 11:10:57.434 sandboxd        ([5935]) DumpGPURestart(5935) deny ipc-posix-shm apple.shm.notification_center

06/11/2011 11:10:57.461 sandboxd        ([5935]) DumpGPURestart(5935) deny ipc-posix-shm apple.shm.notification_center

06/11/2011 11:10:57.474 sandboxd        ([5935]) DumpGPURestart(5935) deny ipc-posix-shm apple.shm.notification_center

06/11/2011 11:10:57.525 sandboxd        ([5935]) DumpGPURestart(5935) deny ipc-posix-shm apple.shm.notification_center

06/11/2011 11:10:57.628 sandboxd        ([5935]) DumpGPURestart(5935) deny file-read-metadata /Library/Managed Preferences

06/11/2011 11:12:11.676 fseventsd       event logs in /.fseventsd out of sync with volume.  destroying old logs. (416026 18 416074)

06/11/2011 11:11:52.000 bootlog BOOT_TIME 1320570712 0

Just like to point out that I get the same freeze (always after waking from sleep) on my new 27" iMac. However, I am running Snow Leopard 10.6.8.

A Genius told me to upgrade to Lion and comped me the upgrade, but now that I'm seeing this thread I'm quite hesitant. 

I'd hold off on upgrading to Lion.  Wish I had.

I first experienced the freezing when using Snow Leopard (10.6.6 and up).  I had hoped installing LION would solve the problem, but it did not and the freezing continued (in addition to other problems like running the iMac at very high temp).

It is interesting to finally hear from someone freezing in 10.6, as I thought it was just me.  I have a 2008, 20" iMac, so I've just returned to LEOPARD---and have no more trouble.

SOMEONE working for Apple must use an iMac that runs LION.  And they must be freezing like us.

Interesting. Out of curiousity, what CPU do you have? How much RAM? Is your RAM from Apple or 3rd party?

The processor on my 2008 iMac is a Core 2 Duo, 2.66 Ghz.

The RAM is Apple Factory RAM---4 GB.

I meet all of the minumum requirements to run LION.

Apple has released a desktop OS for which there is no iMac capable of running it properly.  Perhaps the Macbook Air and the Mac Mini can deal with it.  But no one seems to have an iMac ( new or not-so-new) that doesn't have LION troubles.  And these are diabolical troubles.

LION is unusable for many of us.

I shared in this frustration for some time but updating to 10.7.1 cleard the freezing problem for me. I don't say this to make those who are still fighting the problem feel badly but to counter the charge that "no one seems to have an iMac ( new or not-so-new) that doesn't have LION troubles."

I know that many who are using 10.7.1 or 10.7.2 are still having this problem and I don't know what in OS 10.7.1 fixed the problem on my 27" mid-2011 iMac. You have my sympathy but Im afraid that's all I can offer.

Well I finally took my imac into the genius bar, they ran diagnostics on it, and determined that the hardware was fine, so they opted to reinstall lion as it was the only possibility remaining, i picked it up the next day, and it was running smoothly, no artifacts. Fast-forward a few days, i woke my imac this morning to find the very same problem, there are artifacts on the display, and it's unresponsive, essentially frozen. This is truly unnacceptable, i'm trying to make money as a designer, and make music as a hobby, and this crap keeps setting me back, i dont have time for this, and apple will be receiving a call later today.