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sunny5

macrumors 6502a
Original poster
Jun 11, 2021
629
444

I have to admit that Apple needs to work hard on their own chip to prevent a lot of crashes. My M1 Mac mini crashed so many times since last year btw. And this time, it was different. I got SOCD report detected: (AP watchdog expired). There are many users reporting this issue on Google and it has to do with HDD and USB connected to M1 Mac. I can not believe M1 Mac crashes just because of both USB and HDD are connected to M1 Mac.

Clearly, there are still a lot of bugs and errors related to M1 chip itself.
 
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sunny5

macrumors 6502a
Original poster
Jun 11, 2021
629
444
Last edited:

bananataffy

macrumors regular
Dec 18, 2012
112
48
I hope Apple is able to fix this through a software update. It seems to be a very common issue for people who use external drives/data hubs, and it's been an issue dating back to many months ago. The fact that Apple hasn't been able to resolve it for so long makes me think it may be a hardware related bug, possibly one connected to the logic board.

I've had this bug happen to me multiple times since owning my M1 Mac mini. The last time, my system restarted during a data transfer and I was afraid that one of my external HD's became corrupted.

According to some of the recent posts in the apple.com thread, it looks like they still haven't fixed it in the latest OS beta, as of July 2021. I'm seriously contemplating returning my Mac if this hasn't been fixed before my return window closes.
 

sunny5

macrumors 6502a
Original poster
Jun 11, 2021
629
444
Are your external drives formated with apfs?
Ich have two mechanical 4tb hard drives and never probkems even without restart for five days.
I think its clickbait article.
Oh, then a lot of users having the same problems are hoax?
 
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sunny5

macrumors 6502a
Original poster
Jun 11, 2021
629
444
I hope Apple is able to fix this through a software update. It seems to be a very common issue for people who use external drives/data hubs, and it's been an issue dating back to many months ago. The fact that Apple hasn't been able to resolve it for so long makes me think it may be a hardware related bug, possibly one connected to the logic board.

I've had this bug happen to me multiple times since owning my M1 Mac mini. The last time, my system restarted during a data transfer and I was afraid that one of my external HD's became corrupted.

According to some of the recent posts in the apple.com thread, it looks like they still haven't fixed it in the latest OS beta, as of July 2021. I'm seriously contemplating returning my Mac if this hasn't been fixed before my return window closes.
It's surprising that some people consider this issue as a clickbait.
 
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xraydoc

macrumors demi-god
Oct 9, 2005
8,703
2,866
192.168.1.1

I have to admit that Apple needs to work hard on their own chip to prevent a lot of crashes. My M1 Mac mini crashed so many times since last year btw. And this time, it was different. I got SOCD report detected: (AP watchdog expired). There are many users reporting this issue on Google and it has to do with HDD and USB connected to M1 Mac. I can not believe M1 Mac crashes just because of both USB and HDD are connected to M1 Mac.

Clearly, there are still a lot of bugs and errors related to M1 chip itself.
Interesting. First I've heard of it. I've had my M1 MBA since February and fortunately I've not seen this error. I've got a Thunderbolt SSD connected frequently.
Hopefully it's resolved in the just-released macOS 11.5.
 

dmccloud

macrumors 68000
Sep 7, 2009
1,935
789
Anchorage, AK
I've had my M1 MBP since December of last year, and I haven't had any issues with external HDs or system crashes, even though I've been running developer previews of MacOS most of the time.
 

bananataffy

macrumors regular
Dec 18, 2012
112
48
No idea why a buzzword like "clickbait" is being thrown around when this is actually a legitimate issue. The Apple and Reddit forum threads that OP linked, which I also have been following, are fairly extensive and have many other users reporting the same issue.

A common link seems to be certain external HDD's, specifically Western Digital ones, and some have been reporting reboots with just a data hub or monitor connected. I have a few WD Easy Stores connected to a Plugable USB hub and it seems to trigger this SOCD Watchdog bug, which causes the system to freeze and requires a reboot. Reformatting and/or reinstalling the OS doesn't fix it, and some users in the aforementioned threads have had their logic board replaced by Apple, also to no avail.

I haven't experienced it in about a week, and I just upgraded to macOS 11.5, so I'll have to wait and see if it's been resolved.
 

ImaginaryNerve

macrumors member
Nov 11, 2020
81
70
Daytona Beach - Florida
Interesting. I've not yet come across this problem. I've a WD 6TB HDD attached directly, a WD HDD attached sort of indirectly (its one of those hubs with a 2.5" HDD slot), and an M.2 thunderbolt drive attached directly.

Though this reminds me of a similar bug I had to deal with a few years ago with Windows. I had a 2TB WD HDD that, whenever I would attempt to copy data over from Windows, would cause a BSOD and I'd have to restart the PC. I tried formatting the drive in various filesystems, I tried different USB ports, USB cables (can I just say...I absolutely hate the USB SS 3.x connector), etc. Nothing worked. Eventually I gave up and just started using the drive on my iMac.

I wonder if its related somehow.
 

paulv1958

macrumors newbie
Dec 9, 2012
6
3
The issue is real

Had this issue 3 times in the past month. 1st time Crackling sound whist playing blueray on external dive. and Mac mini reset, Second time pink dots like a bad video card on external monitor connected via HDMI & reset also whilst watched video clip. 3rd time today 10 min ago Green screen whilst playing a YouTube video then restart.
Mac M1 mini 16Gb purchased April this year.
Has started occurring since I installed an old external power hub to power Pioneer BDXL bluray writer( requires 2 usb connections for sufficient power) and connected 4TB Seagate drive to same Hub( Mbeat 7port USB 3 /2 Hub( Powered).

Previously Seagate was attached directly to USB port on back of mini. No issues prior.

Have just move it back to see if problem persists.

Could well be USB hub & external drive problem as suggested.

OS Big Sur 11.5.1
 
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Kodiak2012

macrumors newbie
Sep 10, 2011
2
0
Just had it happen on Aug 13th 2021 with iMac M1, Big Sur 11.5.2
Was watching a youtube video with Firefox, Only thing aside from the
OS update was I added a pair of Bose external speakers to the headset
port on the side. Been using the iMac for one month with no problems
until now.

macOS Big Sur
Version 11.5.2
iMac (24-inch, M1, 2021)
Chip Apple M1
Memory 16 GB
Startup Disk Macintosh HD (1TB)
 
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rabbacuda

macrumors newbie
Aug 19, 2021
1
0
The issue seems to be related to the wireless connection (AP = Access Point). Wireless delays or disconnections have been reported as well when connecting/disconnecting USB peripherals. You can try and see yourself if that applies to you by launching ping 8.8.8.8 in the terminal, inserting or removing a USB drive and looking at the time values which will start to go up indicating some kind of interference between the USB and the wireless adapter.
 

la_manzana

macrumors newbie
May 3, 2016
22
14
I just experienced this "socd report detected (ap watchdog expired)" on my new MBA M1 (just 14,5 weeks old) with macOS 11.5.2 installed myself. Since I had nothing connected to USB at all (this means also no WD HDD and not even a power cable was plugged in) at the moment it happened I don't believe the cause of this issue is directly related to any external devices at all. I mean it is possible that connected USB devices increase for whatever reason the probability that the error occurs, but most certainly not causing it.

Since it just happen once I have no idea how often it will happen and under witch circumstances. When it happened I had Safari 14.1.2 open and watched a YT video minimised with the picture-in-picture function while playing some Hearthstone game.

What I see with Mac Fan Control (I just use it to visualise a temperature sensor since MBA M1 has no fans) after system comes back was that the temperature of "Power Manager Die Average" was at 75 Celsius and you could also feel it that the MBA was warm (warm and not 75 C hot since I not touched the die directly within the Mac).

So maybe this is causes by a thermal issue of the M1 CPU? It was probably a bad design decision that the MAB has no fan at all since it also can become hot/warm if it uses much CPU power (I checked it in this two APP constellation is 25% of CPU power not more) for a longer period of time. If I only surf and do not play a game the die temperature is only between 35-40 C. But what is the point of have so much CPU power if you are not allowed to use it?

So I really do hope in this case it is only a software issue of macOS and not caused by any form of bad hardware design.


Within the console app in the diagnostics section I also found two identical "ResetCounter-2021-08-22-214510.diag" entries afterwards with following content:
Code:
{"bug_type":"115","timestamp":"2021-08-22 21:45:10.00 +0200","name":"Reset count","os_version":"macOS 11.5.2 (20G95)","incident_id":"PRIVAT"}
Incident Identifier: PRIVAT
CrashReporter Key: PRIVAT
Date: 2021-08-22 21:45:10.00 +0200
Reset count: 0
Boot failure count: 1
Boot faults: wdog
Boot stage: 227
Boot app: 0

*I just replaced the Ids and Keys with PRIVAT.

When googling for "bug_type":"115" and "wdog" you found a lot about iPhone crashes.
So it could be speculate if this is neither because iPhones uses the same CPU architecture as the M1 macs or if there is a software issue within iOSSupport of macOS Big Sur (I have some iOS weather apps running on my Mac). But since it happens only on M1 Macs and not Intel Macs and it seams to happen also on iPhones it looks more like an issue related to the ARM platform.
 
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Kung gu

macrumors 65816
Oct 20, 2018
1,376
2,407
So maybe this is causes by a thermal issue of the M1 CPU? It was probably a bad design decision that the MAB has no fan at all since it also can become hot/warm if it uses much CPU power (I checked it in this two APP constellation is 25% of CPU power not more) for a longer period of time. If I only surf and do not play a game the die temperature is only between 35-40 C. But what is the point of have so much CPU power if you are not allowed to use it?
The MBA throttles after 10 minutes at 90 degrees Celsius. It goes down to 60 degrees after 10 minutes under extreme load.
Even iPad Pro has no fan and has the M1 chip.

If you put into the M1 chip in the Mac Pro, this issue would occur because it is clearly a software issue.

This issue also happens on any M1 (even one with fans) Mac, so this issue is software and likely a bug in ARM macOS.

The A12Z Dev Kits that Apple sent out also had this probelm.
 
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la_manzana

macrumors newbie
May 3, 2016
22
14
really tough to generate statistics with your single sample.

In my case it is fourthly just a single sample until now. Fingers crossed. 🤞

But if you google for the exact error string you find this issue is just all over the place. In many forums speaking people that people experience this error since at least march 2021. Some multiple times. Google already found 695 results for the exact error string matching. That are enough samples for me to assume that here is really something.

I'm using Macs and Computers since decades and I experienced a lot of issues and kernel panics over the years. But this issue is different since this error message has a complete lack of informations to narrow the cause down. And this for a really harsch error comparable to a kernel panic or the GPU reset. In case of a kernel panic you have at leased a detailed log message after the reboot containing a backtrace that shows all involved kernel modules and drivers. But not in this case and that is why I take it more serious.
 
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la_manzana

macrumors newbie
May 3, 2016
22
14
The MBA throttles after 10 minutes at 90 degrees Celsius. It goes down to 60 degrees after 10 minutes under extreme load.
Even iPad Pro has no fan and has the M1 chip.

If you put into the M1 chip in the Mac Pro, this issue would occur because it is clearly a software issue.

This issue also happens on any M1 (even one with fans) Mac, so this issue is software and likely a bug in ARM macOS.

The A12Z Dev Kits that Apple sent out also had this probelm.
That sound kind of promising if this could really a SW problem since SW can be fixed. Flaws in HW not that easy until the vendor not admits it and starts a HW exchange campaign. Like back then with the problems with the Nvidia chips in the 2008 MBPs when Apple exchange all motherboards for free when this issue happens.
 

la_manzana

macrumors newbie
May 3, 2016
22
14
I did a reverse grep on system folder for "SOCD" string and found some matches in the binaries of these kernel extensions from the OS:

/System/Library/Extensions/AppleD2422PMU.kext/Contents/MacOS/AppleD2422PMU
/System/Library/Extensions/AppleD2449PMU.kext/Contents/MacOS/AppleD2449PMU
/System/Library/Extensions/AppleSMC.kext/Contents/MacOS/AppleSMC
/System/Library/Extensions/ApplePMGR.kext/Contents/MacOS/ApplePMGR
/System/Library/Extensions/AppleSPMIPMU.kext/Contents/MacOS/AppleSPMIPMU
/System/Library/Extensions/AppleT8103PMGR.kext/Contents/MacOS/AppleT8103PMGR

PMU = Power Management Unit
SMC = System Management Controller
PMGR = Power Manager (?)

Could mean SOCD is somehow related to the tasks that on Intel Macs did the SMC and PMU.

If we got strange problems on an Intel Mac in the past we would do a SMC and PRAM/NVRAM reset.
But how do this on M1 Mac? I read SMC and PRAM/NVRAM reset functions are no longer available on M1 Macs.
How do a SOCD reset?
 
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l0stl0rd

macrumors regular
Jul 25, 2009
188
196
never had it happen an my M1 air, perhaps I am just lucky or it likes my external drives (using both ssd and hdd).
 
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