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2011 iMac Panic

I have a 2011 iMac that is crashing about one time a day. There does not seem to be any consistent actions that trigger the crash.

Some changes to the iMac are below:

-20GB RAM (stock 4GB + 16GB from OWC)

-SSD conversion from OWC

-2600S CPU swap

-Nvidia 2100M swap

-Running Catalina


The most recent panic report is below (continued in Crash 1) and more are attached (additional available if necessary).


Could someone help identify what is causing this issue, and how it can be resolved. Is it due to the changes above, or is it due to a faulty logic board that needs to be replaced?


panic(cpu 2 caller 0xffffff7fa2c2a306): NVRM[0/1:0:0]: Read Error 0x00000100: CFG 0x11fc10de 0x00180000 0x00000000, BAR0 0xb0000000 0xffffff968687d000 0x0e63c0a1, D0, P2/3


Backtrace (CPU 2), Frame : Return Address


0xffffff827c9832d0 : 0xffffff802193bb1b 


0xffffff827c983320 : 0xffffff8021a733e5 


0xffffff827c983360 : 0xffffff8021a64e5e 


0xffffff827c9833b0 : 0xffffff80218e2a40 


0xffffff827c9833d0 : 0xffffff802193b207 


0xffffff827c9834d0 : 0xffffff802193b5eb 


0xffffff827c983520 : 0xffffff80220d24f9 


0xffffff827c983590 : 0xffffff7fa2c2a306 


0xffffff827c983610 : 0xffffff7fa2cf711b 


0xffffff827c983670 : 0xffffff7fa2cf71c8 


0xffffff827c9836a0 : 0xffffff7fa466091e 


0xffffff827c9836f0 : 0xffffff7fa4660016 


0xffffff827c983760 : 0xffffff7fa2d21130 


0xffffff827c983780 : 0xffffff7fa2c30988 


0xffffff827c983830 : 0xffffff7fa2c2daa1 


0xffffff827c9839b0 : 0xffffff7fa2c2f619 


0xffffff827c983ab0 : 0xffffff7fa2bc2395 


0xffffff827c983ca0 : 0xffffff7fa2bc0ac1 


0xffffff827c983cc0 : 0xffffff7fa49ea556 


0xffffff827c983da0 : 0xffffff7fa49ea004 


0xffffff827c983e00 : 0xffffff7fa49ea418 


0xffffff827c983e20 : 0xffffff8022045a89 


0xffffff827c983e90 : 0xffffff80220459a9 


0xffffff827c983ec0 : 0xffffff802197d765 


0xffffff827c983f40 : 0xffffff802197d291 


0xffffff827c983fa0 : 0xffffff80218e213e 


      Kernel Extensions in backtrace:


         com.apple.nvidia.driver.NVDAResman(14.0)[ECB33CB3-2FE3-3E99-A4E6-ED7C5DA6D543]@0xffffff7fa2bbd000->0xffffff7fa2e94fff


            dependency: com.apple.iokit.IOPCIFamily(2.9)[1286D5E5-A6A1-3C44-A244-04C068903DB2]@0xffffff7fa232f000


            dependency: com.apple.iokit.IONDRVSupport(569.3)[7E47E886-8023-33FA-B62C-730522CBDDF5]@0xffffff7fa2ba1000


            dependency: com.apple.iokit.IOGraphicsFamily(569.3)[7B5CA52B-0BD1-34AB-BFC9-7D5C3A0DBE7C]@0xffffff7fa2b42000


            dependency: com.apple.AppleGraphicsDeviceControl(4.5.21)[EF326A60-9936-3267-A6E7-0044C7B4A952]@0xffffff7fa2bb1000


         com.apple.nvidia.driver.NVDAGK100Hal(14.0)[D9BD5415-852D-3F99-B5D9-9E4FD7CABEEC]@0xffffff7fa4568000->0xffffff7fa4713fff


            dependency: com.apple.nvidia.driver.NVDAResman(14.0.0)[ECB33CB3-2FE3-3E99-A4E6-ED7C5DA6D543]@0xffffff7fa2bbd000


            dependency: com.apple.iokit.IOPCIFamily(2.9)[1286D5E5-A6A1-3C44-A244-04C068903DB2]@0xffffff7fa232f000


         com.apple.driver.AGPM(111.4.1)[8531FB26-0DCE-3075-8DAD-D4205ECFD723]@0xffffff7fa49e4000->0xffffff7fa4a04fff


            dependency: com.apple.iokit.IOPCIFamily(2.9)[1286D5E5-A6A1-3C44-A244-04C068903DB2]@0xffffff7fa232f000


            dependency: com.apple.driver.IOPlatformPluginFamily(6.0.0d8)[0FA49449-221B-3D8F-976F-BDE030111BA7]@0xffffff7fa445d000


            dependency: com.apple.iokit.IONDRVSupport(569.3)[7E47E886-8023-33FA-B62C-730522CBDDF5]@0xffffff7fa2ba1000


            dependency: com.apple.iokit.IOGraphicsFamily(569.3)[7B5CA52B-0BD1-34AB-BFC9-7D5C3A0DBE7C]@0xffffff7fa2b42000


            dependency: com.apple.AppleGraphicsDeviceControl(4.5.21)[EF326A60-9936-3267-A6E7-0044C7B4A952]@0xffffff7fa2bb1000




BSD process name corresponding to current thread: kernel_task


Boot args: -no_compat_check




Mac OS version:


19C57




Kernel version:


Darwin Kernel Version 19.2.0: Sat Nov  9 03:47:04 PST 2019; root:xnu-6153.61.1~20/RELEASE_X86_64


Kernel UUID: C3E7E405-C692-356B-88D3-C30041FD1E72


Kernel slide:     0x0000000021600000


Kernel text base: 0xffffff8021800000


__HIB  text base: 0xffffff8021700000


System model name: iMac12,1 (Mac-942B5BF58194151B)


System shutdown begun: NO


Panic diags file available: YES (0x0)




System uptime in nanoseconds: 1324153882714


last loaded kext at 23896684917: >AudioAUUC 1.70 (addr 0xffffff7fa4ea9000, size 32768)


last unloaded kext at 173753056402: >usb.!UUHCI 1.2 (addr 0xffffff7fa3699000, size 139264)



Thank you!


iMac 21.5", macOS 10.15

Posted on Feb 13, 2020 5:49 AM

Reply
Question marked as Top-ranking reply

Posted on Feb 13, 2020 2:32 PM

Looks for certain to be Video card related.


Have you blown the dust out of the intakes lately?

What temperatures does this App report?

This App can be used to speed up the fans, all my iMacs would be dead without it.

Never ever ever drop fan speeds below the speed that the Mac itself is calling for.

MacFansControl…

https://www.crystalidea.com/macs-fan-control

Similar questions

13 replies
Question marked as Top-ranking reply

Feb 13, 2020 2:32 PM in response to T_Stevenson

Looks for certain to be Video card related.


Have you blown the dust out of the intakes lately?

What temperatures does this App report?

This App can be used to speed up the fans, all my iMacs would be dead without it.

Never ever ever drop fan speeds below the speed that the Mac itself is calling for.

MacFansControl…

https://www.crystalidea.com/macs-fan-control

Feb 13, 2020 2:40 PM in response to BDAqua

Thanks for the reply!

That will be disappointing if it is the gpu - I did get it off ebay (from a reputable dealer), but I really had no way to test it for functionality.


I did clean the fans as much as I could when I had it open last month.


The temps are attached - I have had Macs Fan Control installed since I got the machine, but it has been on auto.



Feb 13, 2020 5:09 PM in response to T_Stevenson

I had a 2011 27" iMac with the AMD Radeon HD 6770M card and it crashed on me. Apple had a recall on it (up to 4 years of purchase) so got it replace free. It crashed again a couple of years later so in on a newer iMac.


Repairing the GPU probably isn't cost effective. I'd strip out the hard drives, recycle the unit and get a new one.


Feb 13, 2020 4:59 PM in response to BDAqua

Good to know that 77°C is the target temp to avoid. I set the optical drive and hard drive fans to hit max at 70°C on the GPU heatsink - hopefully this helps.


It looks like logging isn't an option in MFC anymore (maybe the version I have [1.5.4 Free]?), but I did use the command line parameter to turn it on. Hopefully it will catch something going on during the next crash.


Thanks!

Feb 13, 2020 5:22 PM in response to BDAqua

I'm glad I wasn't just overlooking and the option was still there!


I actually thought about not reinstalling the disc drive when I had the imac open - I guess I should have done that to let the ODD fan be even more effective! Something to keep in mind if turning up the fans doesn't stop the crashes.


If it continues like it has been I should have a useful log tomorrow when it crashes ha

2011 iMac Panic

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