2011 iMac Panic

Question

Level 1

8 points

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

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Answer 1

Best reply

BDAqua

Level 10

239,483 points

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

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Answer 2

T_Stevenson Author

Level 1

8 points

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.

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Answer 3

Old Toad

Level 10

207,751 points

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.

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Answer 4

BDAqua

Level 10

239,483 points

Feb 13, 2020 3:47 PM in response to T_Stevenson

The temps are OK, GPU @ 77°C. is normally where I start seeing Problems on 2011 iMacs.

But who knows how hot it got in the past?

In MFC's Prefs you can set Logging & restart ^& maybe catch the temps near a crash.

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Answer 5

T_Stevenson Author

Level 1

8 points

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!

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Answer 6

T_Stevenson Author

Level 1

8 points

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

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Answer 7

T_Stevenson Author

Level 1

8 points

Feb 15, 2020 11:18 AM in response to BDAqua

Just a quick update - after pushing the fans higher I haven't seen a crash again (knock on wood). Obviously there is a larger issue going on (GPU or logic board?), but for now this seems to work! Thanks for all the help!

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Answer 8

rkaufmann87

Level 10

140,856 points

Feb 13, 2020 3:55 PM in response to T_Stevenson

Did you buy the computer from OWC, if so then please contact ASAP!

Reply

Answer 9

T_Stevenson Author

Level 1

8 points

Feb 13, 2020 5:00 PM in response to rkaufmann87

Unfortunately, that isn't an option - I only got the SSD and RAM from OWC. Even so, it sounds like it may be a GPU issue which has been swapped out from the stock AMD GPU

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