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Constant Kernel Panics – userspace watchdog timeout: no successful checkins from com.apple.WindowServer
- Thread starter monstermac77
- Start date
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kernelpanicffs, Continues to display Apples customer experience position and strategy. The fact that the product does not work and function as advertised or as you expect is due to you having incorrect expectations of the product. Seems this is not going to be fixed in BigSur and it will continue for a long time yet. Eventually if sales fall far enough it may actually get addressed....until then, or the existing hardware becomes obsolete, simply find some work around and do not upgrade. It may be inconvenient and problematic and not the experience on any other platform but it stops frustration. When your hardware becomes obsolete then look for alternatives. The other option is to just sell your MAC and move to linux like johnalan suggests. Seems this is going to be a long term multiyear issue and I would not be surprised if this is actually a hardware issue in the end.
The responsibility of the watchdog is to reset the CPU in case the kernel hangs. Do not blame the messenger look for the root cause instead.
Not blaming anything, just trying to ascertain that we're talking abut the same kind of Kernel Panic.
Not blaming anything, just trying to ascertain that we're talking abut the same kind of Kernel Panic.
That is a fair comment, point taken.
My concern is that I see several different categories of kernel panics and in these forums they often get bunched into one group. Reading deeper in the logs may reveal a root cause and help you find a work around. So I agree with you that it is important that we do not mix them up in discussion.
Personally I have had kernel panics waking from sleep, which I have verified (on different systems and different OS versions) are related to CalDigit TS3+. Removing the TS3+ completely removes all kernel panics.
As an aside it seems that Apple is aware of the “noise” caused be people reading the logs and has put some work into improving them, e.g. references to BridgeOS (T2) seems to have been removed. Again T2 was generally the messenger.
I've been working through the issue with Apple for a period of weeks now, trying to determine whether there was specific software causing a problem, fresh installs etc on my Mac Mini 2018 - and no matter what we did, it still did a kernel panic at shutdown.
That eventually led to Apple saying that they would need to replace the motherboard.
I got my computer back yesterday, and whilst the motherboard has been replaced it came back with 16Gb of RAM instead of 32Gb of RAM which i had previously.
However, whilst I'll deal with that as an issue, I have yet to have a kernel panic since getting it back. I know some others have said they have had motherboard replacements and it hasn't resolved the issue - so will continue to monitor.
That eventually led to Apple saying that they would need to replace the motherboard.
I got my computer back yesterday, and whilst the motherboard has been replaced it came back with 16Gb of RAM instead of 32Gb of RAM which i had previously.
However, whilst I'll deal with that as an issue, I have yet to have a kernel panic since getting it back. I know some others have said they have had motherboard replacements and it hasn't resolved the issue - so will continue to monitor.
Disgusting mess. Still occurring in Big Sur, clean install. Beta 6. This occurred during update to 7 as I had to reboot to update. ****ing lol.
Seems unrelated, but I just tried the game Magic the Gathering: Arena which was released for macOS a couple of months ago on Catalina 10.15.6, and after quitting the game the screen froze for a few seconds and then the computer restarted with the following Kernel Panic log:
No watchdog mentioned here, but…
The drivers for the RX 5700 XT on Windows 10 was recently updated to 20.9.1 with a fix for:
A black screen, system crash or TDR may occur while gaming when performing task switches, enabling performance metrics overlay, or having video content/web browsers open on secondary displays on Radeon RX 5000 series graphics products system configurations.
I wonder if this in any way might have any implications for the macOS drivers? 🤔
Oh, well… Since the panic with ”watchdog timeout” being mentioned also seem to happen with Intel GPUs I guess there's more to it than AMD graphics drivers. 🤷♂️
Code:
Machine-check capabilities: 0x0000000000001c09
family: 6 model: 44 stepping: 2 microcode: 31
signature: 0x206c2
Intel(R) Xeon(R) CPU W3680 @ 3.33GHz
9 error-reporting banks
mp_kdp_enter() timed-out on cpu 10, NMI-ing
mp_kdp_enter() NMI pending on cpus: 0 1 2 3 4 5 6 7 8 9 11
mp_kdp_enter() timed-out during locked wait after NMI;expected 12 acks but received 1 after 35671347 loops in 1662499788 ticks
panic(cpu 10 caller 0xffffff80104471ec): "Machine Check at 0xffffff7f9353ab0e, registers:\n" "CR0: 0x000000008001003b, CR2: 0x000000010b0e3000, CR3: 0x0000000016f6d000, CR4: 0x00000000000226e0\n" "RAX: 0x0000000000000020, RBX: 0xffffff804e283e00, RCX: 0x0000000000000001, RDX: 0x0000000000000000\n" "RSP: 0xffffffa3de983d50, RBP: 0xffffffa3de983d80, RSI: 0x0000000000000006, RDI: 0xffffff804e71c880\n" "R8: 0xffffff804e739c00, R9: 0x0000153f994bf3a6, R10: 0x0000000000000000, R11: 0x0000000000000008\n" "R12: 0xffffff7f93557630, R13: 0xffffff804dba5b40, R14: 0x0000000000000006, R15: 0x00000000000007b0\n" "RFL: 0x0000000000000046, RIP: 0xffffff7f9353ab0e, CS: 0x0000000000000008, SS: 0x0000000000000010\n" "Error code: 0x0000000000000000\n"@/AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/xnu/xnu-6153.141.1/osfmk/i386/trap_native.c:168
Backtrace (CPU 10), Frame : Return Address
0xffffff8010156310 : 0xffffff801031a65d
0xffffff8010156360 : 0xffffff8010454a75
0xffffff80101563a0 : 0xffffff80104465fe
0xffffff80101563f0 : 0xffffff80102c0a40
0xffffff8010156410 : 0xffffff8010319d27
0xffffff8010156510 : 0xffffff801031a117
0xffffff8010156560 : 0xffffff8010ac1abc
0xffffff80101565d0 : 0xffffff80104471ec
0xffffff80101566c0 : 0xffffff8010ac1c28
0xffffff80101566d0 : 0xffffff80102c129f
0xffffffa3de983d80 : 0xffffff7f935336d3
0xffffffa3de983e60 : 0xffffff7f93532a4a
0xffffffa3de983f20 : 0xffffff801044857a
0xffffffa3de983f40 : 0xffffff801033f7a7
0xffffffa3de983f80 : 0xffffff801033f968
0xffffffa3de983fa0 : 0xffffff80102c013e
Kernel Extensions in backtrace:
com.apple.driver.AppleIntelCPUPowerManagement(222.0)[822E881A-D45E-3F9E-8F10-41BB1F3C8935]@0xffffff7f93530000->0xffffff7f93559fff
BSD process name corresponding to current thread: kernel_task
Boot args: agdpmod=pikera shikigva=80 mbasd=1 -wegtree -no_compat_check no32exec=0
Mac OS version:
19G2021
Kernel version:
Darwin Kernel Version 19.6.0: Thu Jun 18 20:49:00 PDT 2020; root:xnu-6153.141.1~1/RELEASE_X86_64
Kernel UUID: 1D3A0F3D-D908-397B-BD16-8F48C0823A2E
Kernel slide: 0x0000000010000000
Kernel text base: 0xffffff8010200000
__HIB text base: 0xffffff8010100000
System model name: MacPro5,1 (Mac-7BA5B2D9E42DDD94)
System shutdown begun: NO
Panic diags file available: NO (0xe00002bc)No watchdog mentioned here, but…
The drivers for the RX 5700 XT on Windows 10 was recently updated to 20.9.1 with a fix for:
A black screen, system crash or TDR may occur while gaming when performing task switches, enabling performance metrics overlay, or having video content/web browsers open on secondary displays on Radeon RX 5000 series graphics products system configurations.
I wonder if this in any way might have any implications for the macOS drivers? 🤔
Oh, well… Since the panic with ”watchdog timeout” being mentioned also seem to happen with Intel GPUs I guess there's more to it than AMD graphics drivers. 🤷♂️
Last edited:
Yep on the replacement (new logic board mac) which by the way, I checked my router logs and compared MAC address for the WiFi chip on the old and new logic boards, they are manufactured about 2 million addresses apart, so defo from different batches.
I think it may be software at this point but I cannot understand how it goes unfixed. How do engineers at Apple put up with not being able to shutdown macOS gracefully ffs.
[automerge]1600556241[/automerge]
Can’t remember, will post full panic log next time it happens (tomorrow).
Yep I think it’s something deeper. Like maybe a fundamental issue with the kernel on some build to order macs.
Well seems I'm staying on 10.15.1 still. I get issues with external monitors and a KP every few weeks after Apple replaced my 2017 logic board as Catalina killed it. Since then, and with Covid, I've not been game to even contemplate doing an upgrade given all the problems with external monitors and KP. Guess I will be staying here for a long time yet by the looks of the problem being in BigSur as well. At this point in time it is not promising that this will get fixed. I was considering a new MAC but now I've decided that since Apple can not produce reliable software that works with hardware that I will wait for as long as absolutely possible. That probably means for another 1-2 years. There is no reason to throw $$ at a high end expensive machine to find that it is unreliable. Disappointing.
Had another panic this morning and thought of you
Had nothing attached, no USB devices etc.
Code:
panic(cpu 2 caller 0xffffff80213139ec): watchdog timeout: no checkins from watchdogd in 306 seconds (419 totalcheckins since monitoring last enabled), shutdown in progress
Backtrace (CPU 2), Frame : Return Address
0xffffffa0c69fbc00 : 0xffffff801e0bb65d
0xffffffa0c69fbc50 : 0xffffff801e1fdb33
0xffffffa0c69fbc90 : 0xffffff801e1edf4a
0xffffffa0c69fbce0 : 0xffffff801e060a2f
0xffffffa0c69fbd00 : 0xffffff801e0baefd
0xffffffa0c69fbe20 : 0xffffff801e0bb1e8
0xffffffa0c69fbe90 : 0xffffff801e8b9754
0xffffffa0c69fbf00 : 0xffffff80213139ec
0xffffffa0c69fbf10 : 0xffffff8021313346
0xffffffa0c69fbf50 : 0xffffff801f67d9f0
0xffffffa0c69fbfa0 : 0xffffff801e06013e
Kernel Extensions in backtrace:
com.apple.driver.watchdog(1.0)[6CB1722A-2CA3-31BF-88AD-EE8DACDE3B68]@0xffffff8021312000->0xffffff8021313fff
com.apple.driver.AppleSMC(3.1.9)[4608700D-CAD2-3873-9E6F-A8EBC8BF937D]@0xffffff801f66e000->0xffffff801f686fff
dependency: com.apple.driver.watchdog(1)[6CB1722A-2CA3-31BF-88AD-EE8DACDE3B68]@0xffffff8021312000->0xffffff8021313fff
dependency: com.apple.iokit.IOACPIFamily(1.4)[3EC07BB1-A5FF-387B-BBA8-C22A91181C4A]@0xffffff802049a000->0xffffff802049bfff
dependency: com.apple.iokit.IOPCIFamily(2.9)[642AE6D9-5637-3B98-AEA5-2E31C30035B6]@0xffffff80209df000->0xffffff8020a06fff
Process name corresponding to current thread: kernel_task
Boot args: chunklist-security-epoch=0 -chunklist-no-rev2-dev
Mac OS version:
20A5374g
Kernel version:
Darwin Kernel Version 20.1.0: Sat Sep 12 20:06:09 PDT 2020; root:xnu-7195.40.84.171.4~1/RELEASE_X86_64
Kernel UUID: E52A5F5D-A078-3D28-8BFA-CC0CF48D5221
KernelCache slide: 0x000000001de00000
KernelCache base: 0xffffff801e000000
Kernel slide: 0x000000001de10000
Kernel text base: 0xffffff801e010000
__HIB text base: 0xffffff801df00000
System model name: MacBookPro16,1 (Mac-E1008331FDC96864)
System shutdown begun: YES
Hibernation exit count: 0
System uptime in nanoseconds: 4480854747113
Last Sleep: absolute base_tsc base_nano
Uptime : 0x0000041347c17016
Sleep : 0x0000000000000000 0x0000000000000000 0x0000000000000000
Wake : 0x0000000000000000 0x0000000ecb88192e 0x0000000000000000
last started kext at 398632994064: @filesystems.msdosfs 1.10 (addr 0xffffff7fbe577000, size 57344)
last stopped kext at 1096913079076: >usb.!UHostPacketFilter 1.0 (addr 0xffffff8020e0a000, size 8192)
loaded kexts:
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@!AGPUWrangler 6.1.23
|IOSlowAdaptiveClocking!F 1.0.0
|IOAccelerator!F2 439.35.1
@!AGraphicsDeviceControl 6.1.23
|IOGraphics!F 585
>usb.cdc.ncm 5.0.0
>usb.cdc 5.0.0
>usb.networking 5.0.0
>usb.!UHostCompositeDevice 1.2
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|IOSerial!F 11
|IO80211!FV2 1200.12.2b1
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>corecapture 1.0.4
>!AThunderboltPCIDownAdapter 4.1.1
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>!A!ILpssDmac 3.0.60
>!ABSDKextStarter 3
|IOSurface 289.2
|IOSkywalk!F 1
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@filesystems.hfs.encodings.kext 1
>usb.!UVHCIBCE 1.2
>usb.!UVHCICommonBCE 1.0
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>!AEffaceableNOR 1.0
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|IOUSB!F 900.4.2
>usb.!UXHCIPCI 1.2
>usb.!UXHCI 1.2
>!AEFINVRAM 2.1
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$!AImage4 3.0.0
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>DiskImages 493.0.0
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$quarantine 4
$sandbox 300.0
@kext.!AMatch 1.0.0d1
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>!AKeyStore 2
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>!AMobileFileIntegrity 1.0.5
@kext.CoreTrust 1
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>watchdog 1
@kec.pthread 1
@kec.corecrypto 1.0
@kec.Libm 1Sad isn't it that new device with nothing attached crash. And seeing all the attempted work arounds to turn every thing thats possible in the OS off and then uninstall software of any nature. It is just a mess that will eventually hurt Apple. Apple seem to want to ignore that the problem exists and it has a history of doing this until the noise gets too loud. Guess a year is not long enough.....maybe 2.
Just finished reading this entire thread, thought I'd chip in with my experience:
2017 iMac Pro (Radeon Pro Vega 56)
DELL U2718Q via Thunderbolt/DisplayPort
macOS 10.15.6
I have gotten a "panic(cpu 2 caller 0xffffff7f8aba1ad5): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 120 seconds service: com.apple.logd, total successful checkins since load [etc]" several times with very specific GPU loads.
I am a college professor and I am teaching remotely. We use Webex (YUCK), and I have to share my iPad screen, which Webex does not directly support. To do this I use QuickTime -> New Movie Recording, then choose my iPad as the source; this mirrors my iPad onto my screen. I then share QuickTime through Webex. I'm also streaming audio and video, plus receiving video from my class - so theres a lot of stuff going on. I have had the above panic about 20% of the time using this setup. Usually things freeze up after ~1 hour of doing this.
2017 iMac Pro (Radeon Pro Vega 56)
DELL U2718Q via Thunderbolt/DisplayPort
macOS 10.15.6
I have gotten a "panic(cpu 2 caller 0xffffff7f8aba1ad5): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 120 seconds service: com.apple.logd, total successful checkins since load [etc]" several times with very specific GPU loads.
I am a college professor and I am teaching remotely. We use Webex (YUCK), and I have to share my iPad screen, which Webex does not directly support. To do this I use QuickTime -> New Movie Recording, then choose my iPad as the source; this mirrors my iPad onto my screen. I then share QuickTime through Webex. I'm also streaming audio and video, plus receiving video from my class - so theres a lot of stuff going on. I have had the above panic about 20% of the time using this setup. Usually things freeze up after ~1 hour of doing this.
Also just finished reading this entire thread; (and every other thread I could find on the internet).
My primary machine is running 10.15.6 w/ the supplemental update. It crashes every day (usually around 10am) with this same panic. I've got all suggested options set. Running Caffeine seems to extend the uptime to 3-5 days, even though sleep is disabled. Specs: iMac Pro 10-core/128/Vega 64 w/ 5700xt in Razor eGPU, LG 5k, Apple XDR, and Dell 38" Ultrawide. Unplugging everything does nothing to change the frequency of the crashes.
Just upgraded a headless 2013 Mac Pro from 10.15.3 (fresh install) to 10.15.6 and now it's doing the same thing, daily. Sadly, it's offsite and requires me to send someone to physically restart it.
Lastly, I have a 2019 MBP 15" also on 10.15.6 that has never experienced this issue, even when connected to the same eGPU & displays as the iMac, but it recently has started suffering crashes from "Sleep Wake Failure in EFI" errors.
Pulling my hair out... This is absurd.
My primary machine is running 10.15.6 w/ the supplemental update. It crashes every day (usually around 10am) with this same panic. I've got all suggested options set. Running Caffeine seems to extend the uptime to 3-5 days, even though sleep is disabled. Specs: iMac Pro 10-core/128/Vega 64 w/ 5700xt in Razor eGPU, LG 5k, Apple XDR, and Dell 38" Ultrawide. Unplugging everything does nothing to change the frequency of the crashes.
Just upgraded a headless 2013 Mac Pro from 10.15.3 (fresh install) to 10.15.6 and now it's doing the same thing, daily. Sadly, it's offsite and requires me to send someone to physically restart it.
Lastly, I have a 2019 MBP 15" also on 10.15.6 that has never experienced this issue, even when connected to the same eGPU & displays as the iMac, but it recently has started suffering crashes from "Sleep Wake Failure in EFI" errors.
Pulling my hair out... This is absurd.
Still there. 🥴
I was nearly excited because there was a release note to say:
Excellent Analysis here:
jm33.me
I was nearly excited because there was a release note to say:
- An issue with the kernel no longer causes applications to quit unexpectedly. (69093270)
Code:
panic(cpu 2 caller 0xffffff8021b139ec): watchdog timeout: no checkins from watchdogd in 306 seconds (8 totalcheckins since monitoring last enabled), shutdown in progress
Backtrace (CPU 2), Frame : Return Address
0xffffffa0c722bc00 : 0xffffff801e8bb65d
0xffffffa0c722bc50 : 0xffffff801e9fdb33
0xffffffa0c722bc90 : 0xffffff801e9edf4a
0xffffffa0c722bce0 : 0xffffff801e860a2f
0xffffffa0c722bd00 : 0xffffff801e8baefd
0xffffffa0c722be20 : 0xffffff801e8bb1e8
0xffffffa0c722be90 : 0xffffff801f0b9bf4
0xffffffa0c722bf00 : 0xffffff8021b139ec
0xffffffa0c722bf10 : 0xffffff8021b13346
0xffffffa0c722bf50 : 0xffffff801fe7d9f0
0xffffffa0c722bfa0 : 0xffffff801e86013e
Kernel Extensions in backtrace:
com.apple.driver.watchdog(1.0)[6CB1722A-2CA3-31BF-88AD-EE8DACDE3B68]@0xffffff8021b12000->0xffffff8021b13fff
com.apple.driver.AppleSMC(3.1.9)[4608700D-CAD2-3873-9E6F-A8EBC8BF937D]@0xffffff801fe6e000->0xffffff801fe86fff
dependency: com.apple.driver.watchdog(1)[6CB1722A-2CA3-31BF-88AD-EE8DACDE3B68]@0xffffff8021b12000->0xffffff8021b13fff
dependency: com.apple.iokit.IOACPIFamily(1.4)[3EC07BB1-A5FF-387B-BBA8-C22A91181C4A]@0xffffff8020c9a000->0xffffff8020c9bfff
dependency: com.apple.iokit.IOPCIFamily(2.9)[6223446D-5319-3378-9CE2-0A8E8E74F67B]@0xffffff80211df000->0xffffff8021206fff
Process name corresponding to current thread: kernel_task
Boot args: chunklist-security-epoch=0 -chunklist-no-rev2-dev
Mac OS version:
20A5374i
Kernel version:
Darwin Kernel Version 20.1.0: Thu Sep 17 22:14:18 PDT 2020; root:xnu-7195.40.84.171.5~4/RELEASE_X86_64
Kernel UUID: 1BEB2151-70F0-3656-AF8F-9BF853F1F2C1
KernelCache slide: 0x000000001e600000
KernelCache base: 0xffffff801e800000
Kernel slide: 0x000000001e610000
Kernel text base: 0xffffff801e810000
__HIB text base: 0xffffff801e700000
System model name: MacBookPro16,1 (Mac-E1008331FDC96864)
System shutdown begun: YES
Hibernation exit count: 0
System uptime in nanoseconds: 370718570962
Last Sleep: absolute base_tsc base_nano
Uptime : 0x00000056508c81bb
Sleep : 0x0000000000000000 0x0000000000000000 0x0000000000000000
Wake : 0x0000000000000000 0x0000000ab2d19236 0x0000000000000000
last started kext at 7210061830: >!AHIDKeyboard 222 (addr 0xffffff801fc68000, size 16384)
loaded kexts:
>!ATopCaseHIDEventDriver 4000.21
>!AHIDALSService 1
>AGPM 119
>!APlatformEnabler 2.7.0d0
>X86PlatformShim 1.0.0
@fileutil 20.036.15
@filesystems.autofs 3.0
@filesystems.ntfs 3.14.3
@kext.AMDRadeonX6000 4.0.0
@kext.AMDRadeonServiceManager 4.0.0
>!AUpstreamUserClient 3.6.8
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@AGDCPluginDisplayMetrics 6.1.23
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@kec.Libm 1Excellent Analysis here:
Digging Into A macOS Kernel Panic
TL;DR (2021-06-09) AppleSMC is a kernel module that communicates with SMC (System_Management_Controller), and the SMC is basically an Apple co-processor that has its own firmware, used to manage the upper layer system including disk encryption, etc. I was able to dig into AppleSMC's backtrace...
jm33.me
Last edited:
Just to let you know I've also ruled out it being a bad macOS install by doing a clean install of Catalina 10.15.6 – same Kernel Panic happened there too after a while.
The only third party app that was running was Firefox with a YouTube clip open and after a wake from sleep the screen stayed black and a minute or so later the computer restarted showing me the Kernel Panic log.
The only third party app that was running was Firefox with a YouTube clip open and after a wake from sleep the screen stayed black and a minute or so later the computer restarted showing me the Kernel Panic log.