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Constant Kernel Panics – userspace watchdog timeout: no successful checkins from com.apple.WindowServer

cfdlab said:
I am also seeing -20 as crash shutdown reason

Code: 
2020-11-19 22:12:06.240157+0530 0xd0       Default     0x0                  0      0    kernel: (AppleSMC) Previous shutdown cause: -20
Click to expand...

cjmildenberg said:
I can also confirm that I am also getting -20 as the shutdown reason.

This problem had gone away for me in 10.15.6+

Back with a vengeance in Big Sur (including the 11.1 beta).

I can resolve this issue by unplugging one of my two external monitors. (iMac Pro)
Click to expand...

Have you tried the the SMC reset I suggested above?

Reset the SMC of your Mac - Apple Support

The SMC is responsible for managing power on your Mac. Resetting it can resolve certain uncommon issues related to power or thermal management.
support.apple.com support.apple.com

Connor Linfoot said:
Been having kernel panic crashing for a while now on my 2019 iMac but it seems to have gotten worse and sometimes happens multiple times a day. I updated to Big Sur yesterday hoping it would fix it but it happened again just 10 minutes after. I've attached my crash log and report to see if anyone can help with it being something specific. I don't use an external GPU but I do have 2 external displays connected over USB-C to HDMI.
Click to expand...

Maybe you could try to remove one of those drivers at a time (if you don't need them) and see if it makes any difference:

com.Cycling74.driver.Soundflower 2
com.displaylink.DisplayLinkDriver 5.2.4 (82)
com.intel.driver.EnergyDriver 3.6.0

I would start with the DisplayLinkDriver.

Oh, I see now that you have an old version 5.2.4 of the DisplayLink driver. Maybe you could try to uninstall the one you have with the installer found in the 5.2.4 version under ”Legacy Releases” here:

DisplayLink macOS Software for Downloads Section | Synaptics

WindowsmacOSAndroidChrome OSUbuntuCorpo
www.displaylink.com www.displaylink.com

After that install the ”DisplayLink Manager Graphics Connectivity” there at the top which says it is for Big Sur. Or maybe skip installing it at all if you don't need it. :)

On my system I'm ready to conclude that the Kernel Panics I had in Catalina are gone since the Big Sur release. 👍
 
star-affinity said:
Have you tried the the SMC reset I suggested above?

Reset the SMC of your Mac - Apple Support

The SMC is responsible for managing power on your Mac. Resetting it can resolve certain uncommon issues related to power or thermal management.
support.apple.com support.apple.com



Maybe you could try to remove one of those drivers at a time (if you don't need them) and see if it makes any difference:

com.Cycling74.driver.Soundflower 2
com.displaylink.DisplayLinkDriver 5.2.4 (82)
com.intel.driver.EnergyDriver 3.6.0

I would start with the DisplayLinkDriver.

Oh, I see now that you have an old version 5.2.4 of the DisplayLink driver. Maybe you could try to uninstall the one you have with the installer found in the 5.2.4 version under ”Legacy Releases” here:

DisplayLink macOS Software for Downloads Section | Synaptics

WindowsmacOSAndroidChrome OSUbuntuCorpo
www.displaylink.com www.displaylink.com

After that install the ”DisplayLink Manager Graphics Connectivity” there at the top which says it is for Big Sur. Or maybe skip installing it at all if you don't need it. :)

On my system I'm ready to conclude that the Kernel Panics I had in Catalina are gone since the Big Sur release. 👍
Click to expand...
That Intel driver is out of date too. I was having periodic watchdog-related panics until I got rid of the Intel Power Gadget.
 
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star-affinity said:
Have you tried the the SMC reset I suggested above?

Reset the SMC of your Mac - Apple Support

The SMC is responsible for managing power on your Mac. Resetting it can resolve certain uncommon issues related to power or thermal management.
support.apple.com support.apple.com



Maybe you could try to remove one of those drivers at a time (if you don't need them) and see if it makes any difference:

com.Cycling74.driver.Soundflower 2
com.displaylink.DisplayLinkDriver 5.2.4 (82)
com.intel.driver.EnergyDriver 3.6.0

I would start with the DisplayLinkDriver.

Oh, I see now that you have an old version 5.2.4 of the DisplayLink driver. Maybe you could try to uninstall the one you have with the installer found in the 5.2.4 version under ”Legacy Releases” here:

DisplayLink macOS Software for Downloads Section | Synaptics

WindowsmacOSAndroidChrome OSUbuntuCorpo
www.displaylink.com www.displaylink.com

After that install the ”DisplayLink Manager Graphics Connectivity” there at the top which says it is for Big Sur. Or maybe skip installing it at all if you don't need it. :)

On my system I'm ready to conclude that the Kernel Panics I had in Catalina are gone since the Big Sur release. 👍
Click to expand...
I have done countless SMC and PRAM resets. The only thing that reliably prevents crashing is disconnecting one of my external monitors, or using Amphetamine App to keep the screens on 24/7.
 
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Reactions: star-affinity
star-affinity said:
Have you tried the the SMC reset I suggested above?

Reset the SMC of your Mac - Apple Support

The SMC is responsible for managing power on your Mac. Resetting it can resolve certain uncommon issues related to power or thermal management.
support.apple.com support.apple.com



Maybe you could try to remove one of those drivers at a time (if you don't need them) and see if it makes any difference:

com.Cycling74.driver.Soundflower 2
com.displaylink.DisplayLinkDriver 5.2.4 (82)
com.intel.driver.EnergyDriver 3.6.0

I would start with the DisplayLinkDriver.

Oh, I see now that you have an old version 5.2.4 of the DisplayLink driver. Maybe you could try to uninstall the one you have with the installer found in the 5.2.4 version under ”Legacy Releases” here:

DisplayLink macOS Software for Downloads Section | Synaptics

WindowsmacOSAndroidChrome OSUbuntuCorpo
www.displaylink.com www.displaylink.com

After that install the ”DisplayLink Manager Graphics Connectivity” there at the top which says it is for Big Sur. Or maybe skip installing it at all if you don't need it. :)

On my system I'm ready to conclude that the Kernel Panics I had in Catalina are gone since the Big Sur release. 👍
Click to expand...

Uninstalled all 3 of those and unfortunately, it still happened :( I'm not sure if there is anything I can provide to give any further hints? The report a problem tool crashed on me when I selected report too. I could try reinstalling macOS but its something I was hoping to avoid.
 
cjmildenberg said:
I have done countless SMC and PRAM resets. The only thing that reliably prevents crashing is disconnecting one of my external monitors, or using Amphetamine App to keep the screens on 24/7.
Click to expand...
If it's reliably
Connor Linfoot said:
Uninstalled all 3 of those and unfortunately, it still happened :( I'm not sure if there is anything I can provide to give any further hints? The report a problem tool crashed on me when I selected report too. I could try reinstalling macOS but its something I was hoping to avoid.
Click to expand...
Sorry to hear that. :(

Maybe just try to re-apply the operating system on top the current install. Could help put things in place without anything on your current install being removed.
 
cjmildenberg said:
I have done countless SMC and PRAM resets. The only thing that reliably prevents crashing is disconnecting one of my external monitors, or using Amphetamine App to keep the screens on 24/7.
Click to expand...
I am doing exactly the same thing on an iMac Pro. I'm running 2 older 27" Dells from the correct thunderbolt ports and running Amphetamine. I had 3 crashes today though. All while using Video or screen share through Skype. It's so intermittent. I could go for a week, and then 3 crashes in a day. I just don't know whether to clean install again. I have a 4 month job coming up and always feel like I'm in square one. Training an Octopus is easier than fixing this thing.
 
Juzzion said:
I am doing exactly the same thing on an iMac Pro. I'm running 2 older 27" Dells from the correct thunderbolt ports and running Amphetamine. I had 3 crashes today though. All while using Video or screen share through Skype. It's so intermittent. I could go for a week, and then 3 crashes in a day. I just don't know whether to clean install again. I have a 4 month job coming up and always feel like I'm in square one. Training an Octopus is easier than fixing this thing.
Click to expand...
Were you stable with the last two releases of Catalina? I had 60+ days of uptime with 10.15.6 and 10.15.7.

I will say, that I got a KP doing a zoom screenshare last week (Big Sur) and that is one of the few times it has crashed while actively using the computer.

Again, if I unplug one monitor, this thing is flawlessly stable. I just refuse to accept that as a solution on a $6k business workstation.
 
cjmildenberg said:
Were you stable with the last two releases of Catalina? I had 60+ days of uptime with 10.15.6 and 10.15.7.

I will say, that I got a KP doing a zoom screenshare last week (Big Sur) and that is one of the few times it has crashed while actively using the computer.

Again, if I unplug one monitor, this thing is flawlessly stable. I just refuse to accept that as a solution on a $6k business workstation.
Click to expand...
Absolutely! I'm wondering how far off a class action is.

What video card are you using? I have the Radeon Pro Vega 64 with 16gb of ram. Also using 2 x single thunderbolt to DisplayPort cables.

Also find it interesting that Apple no longer supports this cable on their site...


1606169220231.png
 
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star-affinity said:
On my system I'm ready to conclude that the Kernel Panics I had in Catalina are gone since the Big Sur release. 👍
Click to expand...
Congrats!!! You've been on this thread since the beginning, so I wanted to come and celebrate. Thanks for helping everyone debug all these months.

I'm still kernel-panic-free since Apple replaced my Mac due to this issue in February. I'm still rocking 10.15.3 since I don't want to rock the boat, but since you've had good luck with Big Sur, I may give it a go.
 
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Completely not game to try Big Sur after losing a logic board due to Catalina upgrade on a 2017 MBP. I'm still sitting on what the replacement logic board had when repaired which is 10.15.1. It has external display resolution issues in inconsistency in setting the resolution but I have workarounds. Looking at all the Kernel Panic and external monitor issues associated with later Catalina versions I'm simply not game to tempt fate and try any Apple upgrade let alone Big Sur. My machine will see out its life on 10.15.1 I guess. I wish everyone who upgrades luck and hope the Kernel Panics are solved for you. When it comes to customers, Apple seems to only respond to the law. Some of the other threads are asking how long this will run before a class action takes place. Will be an interesting question I think.
 
monstermac77 said:
Congrats!!! You've been on this thread since the beginning, so I wanted to come and celebrate. Thanks for helping everyone debug all these months.

I'm still kernel-panic-free since Apple replaced my Mac due to this issue in February. I'm still rocking 10.15.3 since I don't want to rock the boat, but since you've had good luck with Big Sur, I may give it a go.
Click to expand...
Wow, thanks! 😃🥳🤗

I've been reporting to Apple continuously since Catalina 10.15.2 which is when I jumped to Catalina from High Sierra. Since I'm on a MacPro5,1 (with RX 5700 XT graphics) I don't have a computer that is supported by Apple to run Catalina nor Big Sur, but since other people with supported hardware had the same (or similar…) problem I've kept sending reports and updating my bug report.

This problem seems to have many causes – like someone said ”watchdog timeout” is a symptom of the underlying cause – it sure seems the problem can be both software and/or hardware related.

Glad to hear it's stable for you too since that hardware replacement.
 
Last edited:
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Same for me. I do nothing in particular. I went to bathroom and when I went back I found my Mac restarted...

panic(cpu 2 caller 0xffffff8006b53a13): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 120 seconds
service: com.apple.logd, total successful checkins since wake (2590 seconds ago): 260, last successful checkin: 0 seconds ago
service: com.apple.WindowServer, total successful checkins since wake (2590 seconds ago): 248, last successful checkin: 120 seconds ago
service: com.apple.remoted, total successful checkins since wake (2590 seconds ago): 260, last successful checkin: 0 seconds ago

Backtrace (CPU 2), Frame : Return Address
0xffffffb0a5773670 : 0xffffff80038bc66d
0xffffffb0a57736c0 : 0xffffff80039ff073
0xffffffb0a5773700 : 0xffffff80039ef6aa
0xffffffb0a5773750 : 0xffffff8003861a2f
0xffffffb0a5773770 : 0xffffff80038bbf0d
0xffffffb0a5773890 : 0xffffff80038bc1f8
0xffffffb0a5773900 : 0xffffff80040bee84
0xffffffb0a5773970 : 0xffffff8006b53a13
0xffffffb0a5773980 : 0xffffff8006b536ba
0xffffffb0a57739a0 : 0xffffff80040460ee
0xffffffb0a57739f0 : 0xffffff8006b52b0a
0xffffffb0a5773b20 : 0xffffff80040502bb
0xffffffb0a5773c80 : 0xffffff80039aaa61
0xffffffb0a5773d90 : 0xffffff80038c1d77
0xffffffb0a5773e00 : 0xffffff80038985d5
0xffffffb0a5773e60 : 0xffffff80038afb82
0xffffffb0a5773ef0 : 0xffffff80039d3823
0xffffffb0a5773fa0 : 0xffffff8003862216
Kernel Extensions in backtrace:
com.apple.driver.watchdog(1.0)[7948A279-A8B8-3650-AFBF-B1E3EB68942A]@0xffffff8006b52000->0xffffff8006b53fff

Process name corresponding to current thread: watchdogd
Boot args: chunklist-security-epoch=0 -chunklist-no-rev2-dev

Mac OS version:
20B50

Kernel version:
Darwin Kernel Version 20.1.0: Sat Oct 31 00:07:11 PDT 2020; root:xnu-7195.50.7~2/RELEASE_X86_64
Kernel UUID: 84C6DC45-6B02-335F-9439-5D2A9BC385A4
KernelCache slide: 0x0000000003600000
KernelCache base: 0xffffff8003800000
Kernel slide: 0x0000000003610000
Kernel text base: 0xffffff8003810000
__HIB text base: 0xffffff8003700000
System model name: MacBookPro16,2 (Mac-5F9802EFE386AA28)
System shutdown begun: NO
Hibernation exit count: 0

System uptime in nanoseconds: 31481167029169
Last Sleep: absolute base_tsc base_nano
Uptime : 0x00001ca1c7c73411
Sleep : 0x00001a46780fb591 0x0000962504bbfebd 0x000018e1bae90d5f
Wake : 0x00001a467ce7f38e 0x00009a93e63b790f 0x00001a467b6da330
last started kext at 29796798380665: >!AXsanScheme 3 (addr 0xffffff8005061000, size 12288)
last stopped kext at 29955840430525: >usb.!UUserHCI 1 (addr 0xffffff7fa33ef000, size 98304)
loaded kexts:
@filesystems.smbfs 3.4.1
>!ATopCaseHIDEventDriver 4000.27
>!AHIDALSService 1
>AGPM 119
>!APlatformEnabler 2.7.0d0
>X86PlatformShim 1.0.0
@filesystems.autofs 3.0
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|IO!BSerialManager 8.0.1f5
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>!ABridgeAudio!C 100.2
>BridgeAudioCommunication 100.2
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>!AGFXHDA 100.1.431
>!A!IICLGraphics 16.0.0
>!A!ISlowAdaptiveClocking 4.0.0
>!A!IICLLPGraphicsFramebuffer 16.0.0
@filesystems.apfs 1677.50.1
>BCMWLANFirmware4378.Hashstore 1
>BCMWLANFirmware4377.Hashstore 1
>BCMWLANFirmware4364.Hashstore 1
>BCMWLANFirmware4355.Hashstore 1
@filesystems.tmpfs 1
@filesystems.hfs.kext 556.41.1
@BootCache 40
@!AFSCompression.!AFSCompressionTypeZlib 1.0.0
@!AFSCompression.!AFSCompressionTypeDataless 1.0.0d1
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@private.KextAudit 1.0
>!ASmartBatteryManager 161.0.0
>!AACPIButtons 6.1
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>!AACPIEC 6.1
>!AAPIC 1.7
@!ASystemPolicy 2.0.0
@nke.applicationfirewall 310
|IOKitRegistryCompatibility 1
|EndpointSecurity 1
>!AHIDKeyboard 222
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@kext.triggers 1.0
>!AGraphicsControl 6.1.27
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>!ASMBus!C 1.0.18d1
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|IO!BHost!CUARTTransport 8.0.1f5
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|IOGraphics!F 585
@plugin.IOgPTPPlugin 900.11
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>usb.cdc.ncm 5.0.0
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|IOSerial!F 11
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$!AImage4 3.0.0
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|IOReport!F 47
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$quarantine 4
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>!AMobileFileIntegrity 1.0.5
@kext.CoreTrust 1
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>KernelRelayHost 1
|IOUSBHost!F 1.2
>!UHostMergeProperties 1.2
>usb.!UCommon 1.0
>!ABusPower!C 1.0
>!ASEPManager 1.0.1
>IOSlaveProcessor 1
>!AACPIPlatform 6.1
>!ASMC 3.1.9
|IOPCI!F 2.9
|IOACPI!F 1.4
>watchdog 1
@kec.pthread 1
@kec.corecrypto 1.0
@kec.Libm 1
 
You would think that after more than a year Apple would be capable of fixing this. Obviously not a big enough issue for them to do anything about. Look forward to the next release of emoticon.
 
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Reactions: Danny1982
Are you guys using ultrawide monitor type? After switch to normal type monitor, KP not appear for me from few days.
 
Danny1982 said:
Same for me. I do nothing in particular. I went to bathroom and when I went back I found my Mac restarted...

panic(cpu 2 caller 0xffffff8006b53a13): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 120 seconds
service: com.apple.logd, total successful checkins since wake (2590 seconds ago): 260, last successful checkin: 0 seconds ago
service: com.apple.WindowServer, total successful checkins since wake (2590 seconds ago): 248, last successful checkin: 120 seconds ago
service: com.apple.remoted, total successful checkins since wake (2590 seconds ago): 260, last successful checkin: 0 seconds ago

Backtrace (CPU 2), Frame : Return Address
0xffffffb0a5773670 : 0xffffff80038bc66d
0xffffffb0a57736c0 : 0xffffff80039ff073
0xffffffb0a5773700 : 0xffffff80039ef6aa
0xffffffb0a5773750 : 0xffffff8003861a2f
0xffffffb0a5773770 : 0xffffff80038bbf0d
0xffffffb0a5773890 : 0xffffff80038bc1f8
0xffffffb0a5773900 : 0xffffff80040bee84
0xffffffb0a5773970 : 0xffffff8006b53a13
0xffffffb0a5773980 : 0xffffff8006b536ba
0xffffffb0a57739a0 : 0xffffff80040460ee
0xffffffb0a57739f0 : 0xffffff8006b52b0a
0xffffffb0a5773b20 : 0xffffff80040502bb
0xffffffb0a5773c80 : 0xffffff80039aaa61
0xffffffb0a5773d90 : 0xffffff80038c1d77
0xffffffb0a5773e00 : 0xffffff80038985d5
0xffffffb0a5773e60 : 0xffffff80038afb82
0xffffffb0a5773ef0 : 0xffffff80039d3823
0xffffffb0a5773fa0 : 0xffffff8003862216
Kernel Extensions in backtrace:
com.apple.driver.watchdog(1.0)[7948A279-A8B8-3650-AFBF-B1E3EB68942A]@0xffffff8006b52000->0xffffff8006b53fff

Process name corresponding to current thread: watchdogd
Boot args: chunklist-security-epoch=0 -chunklist-no-rev2-dev

Mac OS version:
20B50

Kernel version:
Darwin Kernel Version 20.1.0: Sat Oct 31 00:07:11 PDT 2020; root:xnu-7195.50.7~2/RELEASE_X86_64
Kernel UUID: 84C6DC45-6B02-335F-9439-5D2A9BC385A4
KernelCache slide: 0x0000000003600000
KernelCache base: 0xffffff8003800000
Kernel slide: 0x0000000003610000
Kernel text base: 0xffffff8003810000
__HIB text base: 0xffffff8003700000
System model name: MacBookPro16,2 (Mac-5F9802EFE386AA28)
System shutdown begun: NO
Hibernation exit count: 0

System uptime in nanoseconds: 31481167029169
Last Sleep: absolute base_tsc base_nano
Uptime : 0x00001ca1c7c73411
Sleep : 0x00001a46780fb591 0x0000962504bbfebd 0x000018e1bae90d5f
Wake : 0x00001a467ce7f38e 0x00009a93e63b790f 0x00001a467b6da330
last started kext at 29796798380665: >!AXsanScheme 3 (addr 0xffffff8005061000, size 12288)
last stopped kext at 29955840430525: >usb.!UUserHCI 1 (addr 0xffffff7fa33ef000, size 98304)
loaded kexts:
@filesystems.smbfs 3.4.1
>!ATopCaseHIDEventDriver 4000.27
>!AHIDALSService 1
>AGPM 119
>!APlatformEnabler 2.7.0d0
>X86PlatformShim 1.0.0
@filesystems.autofs 3.0
@fileutil 20.036.15
>!AGraphicsDevicePolicy 6.1.27
@AGDCPluginDisplayMetrics 6.1.27
>!AUpstreamUserClient 3.6.8
>pmtelemetry 1
>LuaHardwareAccess 1.0.16
|IOUserEthernet 1.0.1
>!ABacklight 180.3
>!AMCCSControl 1.14
>!AThunderboltIP 4.0.3
|IO!BSerialManager 8.0.1f5
@Dont_Steal_Mac_OS_X 7.0.0
>!AHV 1
>!ADiskImages2 1
>!ABridgeAudio!C 100.2
>BridgeAudioCommunication 100.2
>!AAVEBridge 6.1
>!A!IPCHPMC 2.0.1
>!AGFXHDA 100.1.431
>!A!IICLGraphics 16.0.0
>!A!ISlowAdaptiveClocking 4.0.0
>!A!IICLLPGraphicsFramebuffer 16.0.0
@filesystems.apfs 1677.50.1
>BCMWLANFirmware4378.Hashstore 1
>BCMWLANFirmware4377.Hashstore 1
>BCMWLANFirmware4364.Hashstore 1
>BCMWLANFirmware4355.Hashstore 1
@filesystems.tmpfs 1
@filesystems.hfs.kext 556.41.1
@BootCache 40
@!AFSCompression.!AFSCompressionTypeZlib 1.0.0
@!AFSCompression.!AFSCompressionTypeDataless 1.0.0d1
>!ABCMWLANBusInterfacePCIeMac 1
@private.KextAudit 1.0
>!ASmartBatteryManager 161.0.0
>!AACPIButtons 6.1
>!ASMBIOS 2.1
>!AACPIEC 6.1
>!AAPIC 1.7
@!ASystemPolicy 2.0.0
@nke.applicationfirewall 310
|IOKitRegistryCompatibility 1
|EndpointSecurity 1
>!AHIDKeyboard 222
>!AHS!BDriver 4000.27
>IO!BHIDDriver 8.0.1f5
>!AActuatorDriver 4400.28
>!AMultitouchDriver 4400.28
>!AInputDeviceSupport 4400.35
@kext.triggers 1.0
>!AGraphicsControl 6.1.27
>!ABacklightExpert 1.1.0
>!ASMBus!C 1.0.18d1
|IOAVB!F 900.12
>X86PlatformPlugin 1.0.0
|IO!BHost!CUARTTransport 8.0.1f5
|IO!BHost!CTransport 8.0.1f5
>IOPlatformPlugin!F 6.0.0d8
>!A!ILpssUARTv1 3.0.60
>!A!ILpssUARTCommon 3.0.60
>!AOnboardSerial 1.0
|IOAudio!F 300.6.1
@vecLib.kext 1.2.0
@!AGPUWrangler 6.1.27
|IOSlowAdaptiveClocking!F 1.0.0
|IONDRVSupport 585
|IOAccelerator!F2 439.35.4
@!AGraphicsDeviceControl 6.1.27
|IOGraphics!F 585
@plugin.IOgPTPPlugin 900.11
|IOEthernetAVB!C 1.1.0
>usb.cdc.ncm 5.0.0
>usb.cdc 5.0.0
>usb.networking 5.0.0
>usb.!UHostCompositeDevice 1.2
>usb.!UVHCIBCE 1.2
>usb.!UVHCICommonBCE 1.0
>usb.!UVHCI 1.2
>usb.!UVHCICommon 1.0
>!AEffaceableNOR 1.0
|IOBufferCopy!C 1.1.0
|IOBufferCopyEngine!F 1
|IONVMe!F 2.1.0
>!ABSDKextStarter 3
|IOSurface 289.3
@filesystems.hfs.encodings.kext 1
>!AThunderboltPCIDownAdapter 4.1.1
>!AThunderboltDPInAdapter 8.1.4
>!AThunderboltDPAdapter!F 8.1.4
>!AHPM 3.4.4
>!A!ILpssI2C!C 3.0.60
>!A!ILpssI2C 3.0.60
>!A!ILpssDmac 3.0.60
>!ABCMWLANCoreMac 1.0.0
|IOSerial!F 11
|IO80211!FV2 1200.12.2b1
|IOSkywalk!F 1
>mDNSOffloadUserClient 1.0.1b8
>IOImageLoader 1.0.0
>corecapture 1.0.4
|IOUSB!F 900.4.2
>!AThunderboltNHI 7.2.8
|IOThunderbolt!F 9.3.2
>usb.!UXHCIPCI 1.2
>usb.!UXHCI 1.2
>!AEFINVRAM 2.1
>!AEFIRuntime 2.1
>!ASMCRTC 1.0
|IOSMBus!F 1.1
|IOHID!F 2.0.0
$!AImage4 3.0.0
|IOTimeSync!F 900.11
|IONetworking!F 3.4
>DiskImages 493.0.0
|IO!B!F 8.0.1f5
|IOReport!F 47
|IO!BPacketLogger 8.0.1f5
$quarantine 4
$sandbox 300.0
@Kext.!AMatch 1.0.0d1
|CoreAnalytics!F 1
>!ASSE 1.0
>!AKeyStore 2
>!UTDM 511.40.9
|IOUSBMass!SDriver 184.40.6
|IOSCSIBlockCommandsDevice 436.40.6
|IO!S!F 2.1
|IOSCSIArchitectureModel!F 436.40.6
>!AMobileFileIntegrity 1.0.5
@kext.CoreTrust 1
>!AFDEKeyStore 28.30
>!AEffaceable!S 1.0
>!ACredentialManager 1.0
>KernelRelayHost 1
|IOUSBHost!F 1.2
>!UHostMergeProperties 1.2
>usb.!UCommon 1.0
>!ABusPower!C 1.0
>!ASEPManager 1.0.1
>IOSlaveProcessor 1
>!AACPIPlatform 6.1
>!ASMC 3.1.9
|IOPCI!F 2.9
|IOACPI!F 1.4
>watchdog 1
@kec.pthread 1
@kec.corecrypto 1.0
@kec.Libm 1
Click to expand...
Is that on the Big Sur 11.1 beta?

Edit:
Aha, it's the newer 20B50 build of Big Sur 11.0.1. I passed on the log to Apple in my old, still open ”watchdog timoute” report. Not sure if it's of any value to them.
 
Last edited:
Danny1982 said:
Big Sur 11.0.1. I will try to reproduce....
Click to expand...
The best thing is if you can generate a ”sysdiagnose” in close proximity of the Kernel Panic. More info here (still valid for newer macOS releases):


It's great if you can estimate the time of the Kernal Panic occurrence too – will be easier for engineers to find a possible cause in the logs then.

I can then attach that to my bug report with Apple, if it's okay with you. If you can think of a good way to share the file – it tends to be a few hundred MB in size. :)

If you want to share the ”sysdiagnose” with Apple yourself there's more instructions here (requires login with Apple-ID):

 
star-affinity said:
The best thing is if you can generate a ”sysdiagnose” in close proximity of the Kernel Panic. More info here (still valid for newer macOS releases):


It's great if you can estimate the time of the Kernal Panic occurrence too – will be easier for engineers to find a possible cause in the logs then.

I can then attach that to my bug report with Apple, if it's okay with you. If you can think of a good way to share the file – it tends to be a few hundred MB in size. :)

If you want to share the ”sysdiagnose” with Apple yourself there's more instructions here (requires login with Apple-ID):

Click to expand...
It's necessary to reproduce the Panic first and the sysdiagnose in close proximity? correct?
 
  • Like
Reactions: star-affinity
I have given a report on feedbackassistant.apple.com

It says

Code: 
Recent Similar Reports:None

I cant believe that nobody else has reported similar problem.

My problem is not related to windowserver, I get crash only on shutdown/reboot.
 
Okay, damn. I got my first Kernel Panic since Big Sur now – sudden restart when opening a link in a new window in Firefox. But no mention of ”watchdog timeout” like I used to get.

Instead talks about ”panic(cpu 7 caller” and ”kernel trap” and ”Fault CR2”.

Strange – it has been super stable for almost two weeks of usage, and wake/sleep several times,

Oh, well… 😞
 
star-affinity said:
Okay, damn. I got my first Kernel Panic since Big Sur now – sudden restart when opening a link in a new window in Firefox. But no mention of ”watchdog timeout” like I used to get.

Instead talks about ”panic(cpu 7 caller” and ”kernel trap” and ”Fault CR2”.

Strange – it has been super stable for almost two weeks of usage, and wake/sleep several times,

Oh, well… 😞
Click to expand...
What architecture?
 
Another kernel panic....

Machine-check capabilities: 0x0000000000000c0b
family: 6 model: 126 stepping: 5 microcode: 160
signature: 0x706e5
Intel(R) Core(TM) i5-1038NG7 CPU @ 2.00GHz
11 error-reporting banks
Processor 6: IA32_MCG_STATUS: 0x0000000000000005
IA32_MC0_STATUS(0x401): 0xb200000000030005
mp_kdp_enter() timed-out on cpu 1, NMI-ing
mp_kdp_enter() NMI pending on cpus: 0 2 3 4 5 6 7
mp_kdp_enter() timed-out during locked wait after NMI;expected 8 acks but received 1 after 2096655 loops in 998400000 ticks
panic(cpu 1 caller 0xffffff801c3f06a9): "Machine Check at 0xffffff801c4034b9, registers:\n" "CR0: 0x000000008001003b, CR2: 0x00007ff842c3d000, CR3: 0x0000000030362000, CR4: 0x00000000003626e0\n" "RAX: 0x0000000000000060, RBX: 0x000000000000000a, RCX: 0x0000000000000001, RDX: 0x0000000000000000\n" "RSP: 0xffffffa0b9ca3ef0, RBP: 0xffffffa0b9ca3f20, RSI: 0xffffff801d1dc800, RDI: 0xffffff801d0504b0\n" "R8: 0xffffff801d1d6c00, R9: 0x0000000000000008, R10: 0xffffff801d1dc480, R11: 0x00000a5bd6bb3a3f\n" "R12: 0x0000000000000060, R13: 0x07fffffffffffba6, R14: 0x00000a5bd6bb3e98, R15: 0x0000000000000001\n" "RFL: 0x0000000000000046, RIP: 0xffffff801c4034b9, CS: 0x0000000000000008, SS: 0x0000000000000010\n" "Error code: 0x0000000000000000\n"@/AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/xnu/xnu-7195.50.7/osfmk/i386/trap_native.c:168
Backtrace (CPU 1), Frame : Return Address
0xffffff801c156ad0 : 0xffffff801c2bc66d
0xffffff801c156b20 : 0xffffff801c3ff073
0xffffff801c156b60 : 0xffffff801c3ef6aa
0xffffff801c156bb0 : 0xffffff801c261a2f
0xffffff801c156bd0 : 0xffffff801c2bbf0d
0xffffff801c156cf0 : 0xffffff801c2bc1f8
0xffffff801c156d60 : 0xffffff801cabee1a
0xffffff801c156dd0 : 0xffffff801c3f06a9
0xffffff801c156ec0 : 0xffffff801cabf845
0xffffff801c156ed0 : 0xffffff801c26228f
0xffffffa0b9ca3f20 : 0xffffff801c3f1a32
0xffffffa0b9ca3f40 : 0xffffff801c2e3db9
0xffffffa0b9ca3f80 : 0xffffff801c2e3f88
0xffffffa0b9ca3fa0 : 0xffffff801c26113e

Process name corresponding to current thread: kernel_task
Boot args: chunklist-security-epoch=0 -chunklist-no-rev2-dev

Mac OS version:
20B50

Kernel version:
Darwin Kernel Version 20.1.0: Sat Oct 31 00:07:11 PDT 2020; root:xnu-7195.50.7~2/RELEASE_X86_64
Kernel UUID: 84C6DC45-6B02-335F-9439-5D2A9BC385A4
KernelCache slide: 0x000000001c000000
KernelCache base: 0xffffff801c200000
Kernel slide: 0x000000001c010000
Kernel text base: 0xffffff801c210000
__HIB text base: 0xffffff801c100000
System model name: MacBookPro16,2 (Mac-5F9802EFE386AA28)
System shutdown begun: NO
Hibernation exit count: 0

System uptime in nanoseconds: 11390568884532
Last Sleep: absolute base_tsc base_nano
Uptime : 0x00000a5c12d2b938
Sleep : 0x00000a5bbffa9aef 0x00001b4e02a83201 0x00000a4c6668bb3d
Wake : 0x00000a5bc3167e94 0x00001d21b912ad29 0x00000a5bc14bb406
last started kext at 11323844529570: >usb.IOUSBHostHIDDevice 1.2 (addr 0xffffff801f198000, size 40960)
last stopped kext at 10804203684449: >usb.!UUserHCI 1 (addr 0xffffff7fbbdef000, size 98304)
loaded kexts:
>usb.!UUserHCI 1
@filesystems.smbfs 3.4.1
@filesystems.exfat 1.4
>!ATopCaseHIDEventDriver 4000.27
>!AHIDALSService 1
>AGPM 119
>!APlatformEnabler 2.7.0d0
>X86PlatformShim 1.0.0
@fileutil 20.036.15
@filesystems.autofs 3.0
>!AGraphicsDevicePolicy 6.1.27
>!AUpstreamUserClient 3.6.8
@AGDCPluginDisplayMetrics 6.1.27
>pmtelemetry 1
>LuaHardwareAccess 1.0.16
|IOUserEthernet 1.0.1
|IO!BSerialManager 8.0.1f5
@Dont_Steal_Mac_OS_X 7.0.0
>!AHV 1
>!ADiskImages2 1
>BridgeAudioCommunication 100.2
>!AAVEBridge 6.1
>!A!ISlowAdaptiveClocking 4.0.0
>!ABacklight 180.3
>!AMCCSControl 1.14
>!A!IICLGraphics 16.0.0
>!AGFXHDA 100.1.431
>!A!IICLLPGraphicsFramebuffer 16.0.0
>!ABridgeAudio!C 100.2
>!AThunderboltIP 4.0.3
>!A!IPCHPMC 2.0.1
@filesystems.apfs 1677.50.1
>BCMWLANFirmware4378.Hashstore 1
>BCMWLANFirmware4377.Hashstore 1
>BCMWLANFirmware4364.Hashstore 1
>BCMWLANFirmware4355.Hashstore 1
@filesystems.tmpfs 1
@filesystems.hfs.kext 556.41.1
@BootCache 40
@!AFSCompression.!AFSCompressionTypeZlib 1.0.0
@!AFSCompression.!AFSCompressionTypeDataless 1.0.0d1
>!ABCMWLANBusInterfacePCIeMac 1
@private.KextAudit 1.0
>!ASmartBatteryManager 161.0.0
>!AACPIButtons 6.1
>!ASMBIOS 2.1
>!AACPIEC 6.1
>!AAPIC 1.7
@!ASystemPolicy 2.0.0
@nke.applicationfirewall 310
|IOKitRegistryCompatibility 1
|EndpointSecurity 1
>usb.IOUSBHostHIDDevice 1.2
>!UAudio 401.4
>!AHIDKeyboard 222
>!AHS!BDriver 4000.27
>IO!BHIDDriver 8.0.1f5
>!AActuatorDriver 4400.28
>!AMultitouchDriver 4400.28
>!AInputDeviceSupport 4400.35
@kext.triggers 1.0
>!AGraphicsControl 6.1.27
|IOAVB!F 900.12
@!AGPUWrangler 6.1.27
|IOSlowAdaptiveClocking!F 1.0.0
|IO!BHost!CUARTTransport 8.0.1f5
|IO!BHost!CTransport 8.0.1f5
>!ABacklightExpert 1.1.0
>!ASMBus!C 1.0.18d1
|IONDRVSupport 585
|IOAccelerator!F2 439.35.4
@!AGraphicsDeviceControl 6.1.27
|IOGraphics!F 585
|IOAudio!F 300.6.1
@vecLib.kext 1.2.0
>!A!ILpssUARTv1 3.0.60
>!A!ILpssUARTCommon 3.0.60
>!AOnboardSerial 1.0
>X86PlatformPlugin 1.0.0
>IOPlatformPlugin!F 6.0.0d8
@plugin.IOgPTPPlugin 900.11
|IOEthernetAVB!C 1.1.0
>usb.cdc.ncm 5.0.0
>usb.cdc 5.0.0
>usb.networking 5.0.0
>usb.!UHostCompositeDevice 1.2
>usb.!UVHCIBCE 1.2
>usb.!UVHCICommonBCE 1.0
>usb.!UVHCI 1.2
>usb.!UVHCICommon 1.0
>!AEffaceableNOR 1.0
|IOBufferCopy!C 1.1.0
|IOBufferCopyEngine!F 1
|IONVMe!F 2.1.0
>!ABSDKextStarter 3
|IOSurface 289.3
@filesystems.hfs.encodings.kext 1
>!AThunderboltPCIDownAdapter 4.1.1
>!AThunderboltDPInAdapter 8.1.4
>!AThunderboltDPAdapter!F 8.1.4
>!AHPM 3.4.4
>!A!ILpssI2C!C 3.0.60
>!A!ILpssI2C 3.0.60
>!A!ILpssDmac 3.0.60
>!ABCMWLANCoreMac 1.0.0
|IOSerial!F 11
|IO80211!FV2 1200.12.2b1
|IOSkywalk!F 1
>mDNSOffloadUserClient 1.0.1b8
>IOImageLoader 1.0.0
>corecapture 1.0.4
|IOUSB!F 900.4.2
>!AThunderboltNHI 7.2.8
|IOThunderbolt!F 9.3.2
>usb.!UXHCIPCI 1.2
>usb.!UXHCI 1.2
>!AEFINVRAM 2.1
>!AEFIRuntime 2.1
>!ASMCRTC 1.0
|IOSMBus!F 1.1
|IOHID!F 2.0.0
$!AImage4 3.0.0
|IOTimeSync!F 900.11
|IONetworking!F 3.4
>DiskImages 493.0.0
|IO!B!F 8.0.1f5
|IOReport!F 47
|IO!BPacketLogger 8.0.1f5
$quarantine 4
$sandbox 300.0
@Kext.!AMatch 1.0.0d1
|CoreAnalytics!F 1
>!ASSE 1.0
>!AKeyStore 2
>!UTDM 511.40.9
|IOUSBMass!SDriver 184.40.6
|IOSCSIBlockCommandsDevice 436.40.6
|IO!S!F 2.1
|IOSCSIArchitectureModel!F 436.40.6
>!AMobileFileIntegrity 1.0.5
@kext.CoreTrust 1
>!AFDEKeyStore 28.30
>!AEffaceable!S 1.0
>!ACredentialManager 1.0
>KernelRelayHost 1
|IOUSBHost!F 1.2
>!UHostMergeProperties 1.2
>usb.!UCommon 1.0
>!ABusPower!C 1.0
>!ASEPManager 1.0.1
>IOSlaveProcessor 1
>!AACPIPlatform 6.1
>!ASMC 3.1.9
|IOPCI!F 2.9
|IOACPI!F 1.4
>watchdog 1
@kec.pthread 1
@kec.corecrypto 1.0
@kec.Libm 1
 
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