Big Sur Mac Crash 4 times in the last 6 hours - 2 no-report and 2 reports

Having exactly the same problem with iMac (Retina 5K, 27-inch, 2017), 3.8 GHz Quad-Core Intel Core i5

I don't have much to add on previous replies, crash log looks the same, so I won't clutter the message with them;
the only additional thing that I noticed is that it almost always happen when I am not actively working on my Mac (my iMac never sleeps, I have lots of processes running in the background, e.g. from the shell working with remote connected servers; but it is set to lock itself and put the display to sleep. I can actively work on the device, then put the screen to sleep, and an hour after the computer is shut down -- it's not even in the login page, it basically shut down as if someone pushed the power button, and I have to turn it on with the power button, login, etc. The only evidence that this is due to a kernel panic is the aforementioned crash report that I get when I am finally logged in.

Any comments and/or advice will be highly appreciated.

I have exactly the same issue.
For my iMac (Retina 5K, 27-inch, 2017) 3,5 GHz Intel Core i5 quadricore / On Big Sur : 11.2

My iMac crash especially during the night when I'm not using it.
Each day I come back to my office, I notice my iMac has reboot.

I hope to see soon a solution by Apple.

Same problem after Big Sur installation with iMac (Retina 5K, 27-inch, 2019), few BSODs in a last week...

userspace watchdog timeout: no successful checkins from com.apple.logd in 120 seconds
panic(cpu 2 caller 0xffffff8013f6ea25): userspace watchdog timeout: no successful checkins from com.apple.logd in 120 seconds
service returned not alive with context : unresponsive dispatch queue(s): com.apple.firehose.io-wl 
service: com.apple.logd, total successful checkins since wake (3900 seconds ago): 379, last successful checkin: 120 seconds ago
service: com.apple.WindowServer, total successful checkins since wake (3900 seconds ago): 380, last successful checkin: 110 seconds ago

... & so on

panic(cpu 6 caller 0xffffff800b964a25): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 120 seconds

Same here crashes when left alone. I have a monitor attached with thunderbolt 2. Very annoying and I see no fixes here yet.

yep, same where. iMac 27 late 2015

Very annoying. Restarts usually when I'm not using it. Same error

panic(cpu 1 caller 0xffffff800656ea25): userspace watchdog timeout: no successful checkins

Interestingly enough - I am having the same problem with Big Sur. But I also had it on High Sierra since December or so.

It only seems to happen when I have external monitors connected. On High Sierra, changing from HDMI connection to Display Port connection solved the problem. But I upgraded to Big Sur the other day and now it is happening with both.

Model Name: iMac
 Model Identifier: iMac19,1
 Processor Name: 8-Core Intel Core i9
 Processor Speed: 3.6 GHz
 Number of Processors: 1
 Total Number of Cores: 8
 L2 Cache (per Core): 256 KB
 L3 Cache: 16 MB
 Hyper-Threading Technology: Enabled
 Memory: 64 GB
 System Firmware Version: 1554.80.3.0.0
 SMC Version (system): 2.46f13

Same here as well. Has happened about 3 times in the last 24 hours - always when I'm away from and not using my computer

Big Sur 11.2.1
iMac (Retina 5K, 27-inch, 2017)
Processor: 3.4 GHz Quad-Core Intel Core i5
Memory: 8 GB 2400 MHz DDR4

panic(cpu 1 caller 0xffffff800dd64a25): userspace watchdog timeout: no successful checkins from com.apple.logd in 120 seconds
service returned not alive with context : unresponsive dispatch queue(s): com.apple.firehose.drain-mem
service: com.apple.logd, total successful checkins since load (50620 seconds ago): 5051, last successful checkin: 120 seconds ago
service: com.apple.WindowServer, total successful checkins since load (50560 seconds ago): 5056, last successful checkin: 0 seconds ago

I'm with the same problem. I've erased my SSD, reformat it and re-installed the Big Sur. Apparently it was solved, but no.
I downgraded my Mac OS to Sierra, and everything worked fine. Than, I've installed Big Sur again, and the problem remains. I don't think that it is related to the hardware. Considering the number of people facing the same, a fix should be released ASAP.

panic(cpu 2 caller 0xffffff800bfee1e6): Kernel trap at 0xffffff800eb7f03f, type 14=page fault, registers:

Just wanted to add that I am having the same issue. I have it over night and while I am working on it. I am working on a premier pro project. I have been trying to export it and just as it gets to 99%, it crashes. I have had the issue doing other things as well, so I do not think it is isolated to Adobe, but it's possible that I had acrobat open or creative cloud was doing something in the background. I do have a second monitor, so I am going to unplug it and see if that solves anything - at least long enough to get this video exported.

Same problem:

• iMac Pro (2017)

• happens when I go away, screensaver kicks in or when I activate the screensaver (with password lock) by moving my mouse to a hot-edge

• 2 external monitors (left, right) via USB-C/Thunderbolt to HDMI connectors

• 1 NAS via Thunderbolt connected

Same problem here, iMac 27” 2020, 8GB of RAM.

I’ve added the RAM information because I’m starting to think that it could be an out of memory problem, it happens when I’m using Android Studio with either iOS or Android simulators.
It happens ONLY when I have an external monitor plugged via USB-C to HDMI, never happened with external monitors connected via AirPlay or iPad with sidecar or USB-C.
It happened both with Catalina and Big Sur.
It seems completely random and it’s becoming unusable. Those PCs cost almost 3000$, it’s absolutely unacceptable

I have the same issue and I noticed this issue happens when switching between GPU. if settings "Automatic Graphic switch" on when screen saver shows or HDMI plugged computer switches to the Radeon GPU and it freezes. Issue is fixed when I switched "Automatic Graphic switch" off and now computer always uses Radeon as GPU. This is not ideal and permanent solution if you are using the laptop on battery but seems like apple doesnt pay attention to this issue so trying to make ways around it


The details of my error

panic(cpu 2 caller 0xffffff800b764a25): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 120 seconds
service: com.apple.logd, total successful checkins since load (340 seconds ago): 35, last successful checkin: 0 seconds ago
service: com.apple.WindowServer, total successful checkins since load (310 seconds ago): 19, last successful checkin: 120 seconds ago

Backtrace (CPU 2), Frame : Return Address
0xffffffa078fcb670 : 0xffffff80084bab4d 
0xffffffa078fcb6c0 : 0xffffff80085fd7e3 
0xffffffa078fcb700 : 0xffffff80085ede1a 
0xffffffa078fcb750 : 0xffffff800845fa2f 
0xffffffa078fcb770 : 0xffffff80084ba3ed 
0xffffffa078fcb890 : 0xffffff80084ba6d8 
0xffffffa078fcb900 : 0xffffff8008cbf004 
0xffffffa078fcb970 : 0xffffff800b764a25 
0xffffffa078fcb980 : 0xffffff800b764678 
0xffffffa078fcb9a0 : 0xffffff8008c4628e 
0xffffffa078fcb9f0 : 0xffffff800b763ab4 
0xffffffa078fcbb20 : 0xffffff8008c5045b 
0xffffffa078fcbc80 : 0xffffff80085a8e51 
0xffffffa078fcbd90 : 0xffffff80084c0147 
0xffffffa078fcbe00 : 0xffffff8008496905 
0xffffffa078fcbe60 : 0xffffff80084ae062 
0xffffffa078fcbef0 : 0xffffff80085d1fc3 
0xffffffa078fcbfa0 : 0xffffff8008460216 
   Kernel Extensions in backtrace:
     com.apple.driver.watchdog(1.0)[2C1307C5-FD71-3802-8D68-A67DB24BCB4A]@0xffffff800b763000->0xffffff800b764fff

Process name corresponding to current thread: watchdogd

Mac OS version:
20D74

Kernel version:
Darwin Kernel Version 20.3.0: Thu Jan 21 00:07:06 PST 2021; root:xnu-7195.81.3~1/RELEASE_X86_64
Kernel UUID: C86236B2-4976-3542-80CA-74A6B8B4BA03
KernelCache slide: 0x0000000008200000
KernelCache base: 0xffffff8008400000
Kernel slide:   0x0000000008210000
Kernel text base: 0xffffff8008410000
__HIB text base: 0xffffff8008300000
System model name: MacBookPro14,3 (Mac-551B86E5744E2388)
System shutdown begun: NO
Panic diags file available: YES (0x0)
Hibernation exit count: 0

System uptime in nanoseconds: 344371549277
Last Sleep:      absolute      base_tsc     base_nano
 Uptime : 0x000000502e24dbde
 Sleep  : 0x0000000000000000 0x0000000000000000 0x0000000000000000
 Wake  : 0x0000000000000000 0x000000034f31f4e9 0x0000000000000000
last started kext at 80263704241: @filesystems.msdosfs 1.10 (addr 0xffffff7fa95dd000, size 57344)
last stopped kext at 280925303378: >usb.!UHostPacketFilter 1.0 (addr 0xffffff800b24f000, size 8192)
loaded kexts:
org.virtualbox.kext.VBoxNetAdp 6.1.18
org.virtualbox.kext.VBoxNetFlt 6.1.18
org.virtualbox.kext.VBoxUSB 6.1.18
org.virtualbox.kext.VBoxDrv 6.1.18

AudioAUUC 1.70
!APlatformEnabler 2.7.0d0
AGPM 119
X86PlatformShim 1.0.0
@fileutil 20.036.15
@filesystems.autofs 3.0
!AHIDALSService 1
@kext.AMDFramebuffer 4.0.2
@kext.AMDRadeonX4000 4.0.2
!AUpstreamUserClient 3.6.8
@kext.AMDRadeonServiceManager 4.0.2
AGDCBacklightControl 6.2.2
!A!IKBLGraphics 16.0.1
!AGraphicsDevicePolicy 6.2.2
@AGDCPluginDisplayMetrics 6.2.2
!AHDA 283.15
pmtelemetry 1
LuaHardwareAccess 1.0.16
|IOUserEthernet 1.0.1
|IO!BSerialManager 8.0.3d9
!A!IKBLGraphicsFramebuffer 16.0.1
eficheck 1
!AMuxControl 6.2.2
@Dont_Steal_Mac_OS_X 7.0.0
!AHV 1
!ADiskImages2 1
!AMCCSControl 1.14
!AThunderboltIP 4.0.3
!AEmbeddedOSSupportHost 1
!A!IPCHPMC 2.0.1
SMCMotionSensor 3.0.4d1
!A!ISlowAdaptiveClocking 4.0.0
!AGFXHDA 100.1.431
@kext.AMD9500!C 4.0.2
@filesystems.tmpfs 1
@filesystems.hfs.kext 556.60.1
@BootCache 40
@!AFSCompression.!AFSCompressionTypeZlib 1.0.0
@!AFSCompression.!AFSCompressionTypeDataless 1.0.0d1
!ATopCaseHIDEventDriver 4030.5
AirPort.BrcmNIC 1400.1.1
@filesystems.apfs 1677.81.1
@private.KextAudit 1.0
!ASmartBatteryManager 161.0.0
!AACPIButtons 6.1
!ARTC 2.0
!ASMBIOS 2.1
!AACPIEC 6.1
!AAPIC 1.7
@!ASystemPolicy 2.0.0
@nke.applicationfirewall 310
|IOKitRegistryCompatibility 1
|EndpointSecurity 1
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@kext.triggers 1.0
usb.cdc.ncm 5.0.0
usb.!UiBridge 1.0
usb.cdc 5.0.0
usb.networking 5.0.0
usb.!UHostCompositeDevice 1.2
@kext.AMDRadeonX4100HWLibs 1.0
@kext.AMDRadeonX4000HWServices 4.0.2
|IO!BHost!CUARTTransport 8.0.3d9
|IO!BHost!CTransport 8.0.3d9
!ABacklightExpert 1.1.0
DspFuncLib 283.15
@kext.OSvKernDSPLib 529
|IOAccelerator!F2 439.52
!AGraphicsControl 6.2.2
|IOAVB!F 930.1
!ASMBus!C 1.0.18d1
!A!ILpssUARTv1 3.0.60
!A!ILpssUARTCommon 3.0.60
!AOnboardSerial 1.0
|IOSerial!F 11
@!AGPUWrangler 6.2.2
|IOSlowAdaptiveClocking!F 1.0.0
|IONDRVSupport 585
!AHDA!C 283.15
|IOHDA!F 283.15
|IOAudio!F 300.6.1
@vecLib.kext 1.2.0
X86PlatformPlugin 1.0.0
IOPlatformPlugin!F 6.0.0d8
@kext.AMDSupport 4.0.2
@!AGraphicsDeviceControl 6.2.2
|IOGraphics!F 585
@plugin.IOgPTPPlugin 900.11
|IOEthernetAVB!C 1.1.0
!AThunderboltPCIDownAdapter 4.1.1
!AThunderboltDPInAdapter 8.1.4
!AThunderboltDPAdapter!F 8.1.4
!ABSDKextStarter 3
|IOSurface 289.3
@filesystems.hfs.encodings.kext 1
!AActuatorDriver 4400.28
!AHIDKeyboard 223
!AMultitouchDriver 4400.28
!AInputDeviceSupport 4400.35
!AHS!BDriver 4030.5
IO!BHIDDriver 8.0.3d9
!AHSSPIHIDDriver 61
!AHSSPISupport 61
|IO80211!F 1200.12.2b1
|IOSkywalk!F 1
mDNSOffloadUserClient 1.0.1b8
corecapture 1.0.4
!A!ILpssSpi!C 3.0.60
|IONVMe!F 2.1.0
!AThunderboltNHI 7.2.8
!AHPM 3.4.4
|IOThunderbolt!F 9.3.2
!A!ILpssI2C!C 3.0.60
!A!ILpssDmac 3.0.60
!A!ILpssI2C 3.0.60
usb.!UXHCIPCI 1.2
usb.!UXHCI 1.2
!A!ILpssGspi 3.0.60
|IOUSB!F 900.4.2
!AEFINVRAM 2.1
!AEFIRuntime 2.1
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|IOHID!F 2.0.0
$!AImage4 3.0.0
|IOTimeSync!F 900.11
|IONetworking!F 3.4
DiskImages 493.0.0
|IO!B!F 8.0.3d9
|IOReport!F 47
|IO!BPacketLogger 8.0.3d9
$quarantine 4
$sandbox 300.0
@kext.!AMatch 1.0.0d1
|CoreAnalytics!F 1
!ASSE 1.0
!AKeyStore 2
!UTDM 511.60.2
|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
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IOSlaveProcessor 1
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!ASMC 3.1.9
|IOPCI!F 2.9
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watchdog 1
@kec.pthread 1
@kec.corecrypto 11.1
@kec.Libm 1

Been crashing for months now.... Apple Please fix this Thanks!!!!

Panic(cpu 2 caller 0xffffff8021b6ea25): userspace watchdog timeout: no successful checkins from com.apple.logd in 120 seconds service returned not alive with context : unresponsive dispatch queue(s): com.apple.firehose.io-wl
service: com.apple.logd, total successful checkins since load (505108 seconds ago): 50499, last successful checkin: 120 seconds ago service: com.apple.WindowServer, total successful checkins since load (505018 seconds ago): 50501, last successful checkin: 0 seconds ago

Facing the same issue in Big Sur 11.2.3.

panic(cpu 6 caller 0xffffff8020964a25): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 120 seconds
service: com.apple.logd, total successful checkins since wake (4690 seconds ago): 470, last successful checkin: 0 seconds ago
service: com.apple.WindowServer, total successful checkins since wake (4690 seconds ago): 458, last successful checkin: 120 seconds ago
service: com.apple.remoted, total successful checkins since wake (4690 seconds ago): 470, last successful checkin: 0 seconds ago

I am having the same problem since upgrading to big sur. The same issues as outlined above. I have no external hard drives or monitors attached. Adobe creative cloud and software is unusable at the moment with constant crashing - the computer will often just turn off completely. When I use photoshop every time I take an action the image interface flickers which I have never seen before in all my years of using it. The computer is shutting down when Im not using, it doesn't wake up when I touch the mouse, it has a slow start - up and on the login page the keyboard is slower, the mouse freezes for a minute or so and the little icon on the log in page has become pixelated. All of this since the upgrade and all issues started at the same time. Ive had some crash reports and Ive sent the reports but like others I don't always get a report to send. Please help apple

Mac Spec is: iMac (Retina 5K, 27-inch, Late 2015) i5


this is the latest crash report I got a few minutes ago is


panic(cpu 3 caller 0xffffff801a164a25): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 120 seconds

service: com.apple.logd, total successful checkins since wake (1290 seconds ago): 130, last successful checkin: 0 seconds ago

service: com.apple.WindowServer, total successful checkins since wake (1290 seconds ago): 118, last successful checkin: 120 seconds ago



Backtrace (CPU 3), Frame : Return Address

0xffffffb099613670 : 0xffffff8016ebab4d 

0xffffffb0996136c0 : 0xffffff8016ffd7e3 

0xffffffb099613700 : 0xffffff8016fede1a 

0xffffffb099613750 : 0xffffff8016e5fa2f 

0xffffffb099613770 : 0xffffff8016eba3ed 

0xffffffb099613890 : 0xffffff8016eba6d8 

0xffffffb099613900 : 0xffffff80176bf004 

0xffffffb099613970 : 0xffffff801a164a25 

0xffffffb099613980 : 0xffffff801a164678 

0xffffffb0996139a0 : 0xffffff801764628e 

0xffffffb0996139f0 : 0xffffff801a163ab4 

0xffffffb099613b20 : 0xffffff801765045b 

0xffffffb099613c80 : 0xffffff8016fa8e51 

0xffffffb099613d90 : 0xffffff8016ec0147 

0xffffffb099613e00 : 0xffffff8016e96905 

0xffffffb099613e60 : 0xffffff8016eae062 

0xffffffb099613ef0 : 0xffffff8016fd1fc3 

0xffffffb099613fa0 : 0xffffff8016e60216 

      Kernel Extensions in backtrace:

         com.apple.driver.watchdog(1.0)[2C1307C5-FD71-3802-8D68-A67DB24BCB4A]@0xffffff801a163000->0xffffff801a164fff



Process name corresponding to current thread: watchdogd



Mac OS version:

20D80



Kernel version:

Darwin Kernel Version 20.3.0: Thu Jan 21 00:07:06 PST 2021; root:xnu-7195.81.3~1/RELEASE_X86_64

Kernel UUID: C86236B2-4976-3542-80CA-74A6B8B4BA03

KernelCache slide: 0x0000000016c00000

KernelCache base:  0xffffff8016e00000

Kernel slide:      0x0000000016c10000

Kernel text base:  0xffffff8016e10000

__HIB  text base: 0xffffff8016d00000

System model name: iMac17,1 (Mac-65CE76090165799A)

System shutdown begun: NO

Panic diags file available: YES (0x0)

Hibernation exit count: 0



System uptime in nanoseconds: 9499664877805

Last Sleep:           absolute           base_tsc          base_nano

  Uptime  : 0x000008a3d0268b6d

  Sleep   : 0x00000775dc74bf09 0x00000000769c41b8 0x00000764a77d9a28

  Wake    : 0x00000775e3fe843d 0x0000000076c4fba0 0x00000775e2f8265b

last started kext at 9117326347000: >!UAudio 401.4 (addr 0xffffff7fb7310000, size 307200)

last stopped kext at 9177338381181: >usb.cdc 5.0.0 (addr 0xffffff80185de000, size 8192)

loaded kexts:

!ATopCaseHIDEventDriver 4030.5

AudioAUUC 1.70

X86PlatformShim 1.0.0

AGPM 119

!APlatformEnabler 2.7.0d0

@fsplaceholder 1.14.0

@fileutil 20.036.15

!AUpstreamUserClient 3.6.8

@filesystems.autofs 3.0

@kext.AMDFramebuffer 4.0.2

!AMikeyHIDDriver 131

@kext.AMDRadeonX4000 4.0.2

!AMikeyDriver 283.15

@kext.AMDRadeonServiceManager 4.0.2

!AHDA 283.15

!AGraphicsDevicePolicy 6.2.2

!A!IPCHPMC 2.0.1

!AThunderboltIP 4.0.3

!A!ISKLGraphics 16.0.1

!ASMCLMU 212

@AGDCPluginDisplayMetrics 6.2.2

pmtelemetry 1

LuaHardwareAccess 1.0.16

|IOUserEthernet 1.0.1

|IO!BSerialManager 8.0.3d9

@Dont_Steal_Mac_OS_X 7.0.0

!AHV 1

!ADiskImages2 1

!A!ISlowAdaptiveClocking 4.0.0

!A!ISKLGraphicsFramebuffer 16.0.1

eficheck 1

@kext.AMD8000!C 4.0.2

|Broadcom!B20703USBTransport 8.0.3d9

!AMCCSControl 1.14

@filesystems.tmpfs 1

@filesystems.hfs.kext 556.60.1

@BootCache 40

@!AFSCompression.!AFSCompressionTypeZlib 1.0.0

@!AFSCompression.!AFSCompressionTypeDataless 1.0.0d1

@filesystems.apfs 1677.81.1

!ASDXC 1.9.0

|!ABCM5701Ethernet 11.0.0

AirPort.BrcmNIC 1400.1.1

!AAHCIPort 346

@private.KextAudit 1.0

!AACPIButtons 6.1

!ARTC 2.0

!ASMBIOS 2.1

!AACPIEC 6.1

!AAPIC 1.7

@!ASystemPolicy 2.0.0

@nke.applicationfirewall 310

|IOKitRegistryCompatibility 1

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!AHIDKeyboard 223

!AMultitouchDriver 4400.28

!AInputDeviceSupport 4400.35

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DspFuncLib 283.15

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!AHDA!C 283.15

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X86PlatformPlugin 1.0.0

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usb.networking 5.0.0

usb.!UHostCompositeDevice 1.2

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!AThunderboltDPInAdapter 8.1.4

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mDNSOffloadUserClient 1.0.1b8

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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

|CoreAnalytics!F 1

!ASSE 1.0

!AKeyStore 2

!UTDM 511.60.2

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|IO!S!F 2.1

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!AMobileFileIntegrity 1.0.5

@kext.CoreTrust 1

!AFDEKeyStore 28.30

!AEffaceable!S 1.0

!ACredentialManager 1.0

KernelRelayHost 1

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!UHostMergeProperties 1.2

usb.!UCommon 1.0

!ABusPower!C 1.0

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IOSlaveProcessor 1

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watchdog 1

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@kec.corecrypto 11.1

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