Since installing Catalina yesterday, multiple crashes from userspace watchdog timeout

While the problem is occurring is best I believe.

So as mentioned I kept a terminal window open, and when the hang started ran the sysdiagnose command in terminal as the key sequence didn't seem to get a sysdiagnose.

I did this morning and crashed twice by 11 am. I. was actually actively using my computer when it froze and rebooted. Didn't get a chance to test if it happens when sleeps. But certainly that was happening before.

Peter Galvin wrote:

While the problem is occurring is best I believe.

So as mentioned I kept a terminal window open, and when the hang started ran the sysdiagnose command in terminal as the key sequence didn't seem to get a sysdiagnose.

So still seeing these even with the very latest updates. The key shortcut for sysdiagnose is either not being seen or not completing before the watchdog reboots the systems.

Interesting that you can still get to terminal, other than mouse everything is frozen on mine.

It took me several attempts to get a sysdiagnose through. I suggest you keep trying via terminal (having it already open) if you can get to it.

Everyone in general should get the Apple Feedback Assistant app and submit this problem. The more submitted the more they might pay attention.

Of course if you get a sysdiagnose attach it to the report in Feedback Assistant.

I think it's clear there are several causes for this, as in my case I'm no longer having this problem after updating to the latest OS. I do have a couple of apps crashing fairly frequently (Roon and Screenflow so far) but I'll take that over system crashes.

Well... I am still having issues :-( I started the party too early I guess and it also begins to be really annoying. I just send a bug report to Apple. Not even sure if it's not a hardware problem. Would be even worse, since my Mac is a few months old.

A few months old Mac puts you in the winners circle if apple stores are around you and open. Bring it into them and have them fix it. They run advanced diags and will likely find it if it's a HW problem. If a SW problem perhaps they can capture it and escalate it... It's hassle but... if HW you definitely want it fixed while under warrantee. Or you want to eliminate HW as the cause.

Same crash!

panic(cpu 2 caller 0xffffff7f86ba1ad5): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 120 seconds

service: com.apple.logd, total successful checkins since wake (1010 seconds ago): 102, last successful checkin: 0 seconds ago

service: com.apple.WindowServer, total successful checkins since wake (1010 seconds ago): 79, last successful checkin: 120 seconds ago

This happens to me today when i have an external monitor connected though though a docking station and system is idle.

Yeah, will do that. Already spoke to support. Last crash yesterday, trying to shut it down (no external devices connected) was the definitive motive to do so:

panic(cpu 0 caller 0xffffff8008cc3183): "PowerOff timed out in phase 'Notifying priority clients'. Total 30000 ms:
vfs_unmountall: 1195 ms
Blocked on priority client: 31394 ms @ 0x<ptr>, com.apple.iokit.IOStorageFamily(2.1)[E13E9C61-F1F5-3A81-B1EF-65669C3CBDBF]@0x<ptr>->0x<ptr>
"@/AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/xnu/xnu-6153.121.2/iokit/Kernel/IOPMrootDomain.cpp:5403

🤦🏼‍♂️

I tried everything! PRAM NVRAM ... No success. I just found out yesterday that in my case the sleep / wake up issue only exist when the power plug is connected. My Mac not connected to the power cable behaves normally. In Mac Rumors they told me not to worry and that it is not a hardware issue. Still doubting if bringing it in to service. Problem is the being without working tool for a week or so.....

This problem has still not been resolved. I installed Catalina last week (15.5) and whenever I leave my computer for more than 2 minutes it will restart. Also with same errors as mentioned in this chain. Working on an iMac Pro of 2019, with 4 4k LG displays on USB C.

panic(cpu 2 caller 0xffffff7f817a1ad5): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 120 seconds

service: com.apple.logd, total successful checkins since load (12200 seconds ago): 1221, last successful checkin: 0 seconds ago

service: com.apple.WindowServer, total successful checkins since load (12170 seconds ago): 1205, last successful checkin: 120 seconds ago

Backtrace (CPU 2), Frame : Return Address

0xffffffa3cc4ab720 : 0xffffff8000d1f5cd

0xffffffa3cc4ab770 : 0xffffff8000e58b05

0xffffffa3cc4ab7b0 : 0xffffff8000e4a68e

0xffffffa3cc4ab800 : 0xffffff8000cc5a40

0xffffffa3cc4ab820 : 0xffffff8000d1ec97

0xffffffa3cc4ab920 : 0xffffff8000d1f087

0xffffffa3cc4ab970 : 0xffffff80014c2838

0xffffffa3cc4ab9e0 : 0xffffff7f817a1ad5

0xffffffa3cc4ab9f0 : 0xffffff7f817a17fa

0xffffffa3cc4aba10 : 0xffffff8001454a8e

0xffffffa3cc4aba60 : 0xffffff7f817a0cfe

0xffffffa3cc4abb60 : 0xffffff800145dcb3

0xffffffa3cc4abca0 : 0xffffff8000e082b2

0xffffffa3cc4abdb0 : 0xffffff8000d25328

0xffffffa3cc4abe10 : 0xffffff8000cfbcc5

0xffffffa3cc4abe70 : 0xffffff8000d12aa2

0xffffffa3cc4abf00 : 0xffffff8000e30d05

0xffffffa3cc4abfa0 : 0xffffff8000cc6226

Kernel Extensions in backtrace:

com.apple.driver.watchdog(1.0)[B435C72B-B311-3C67-8AA1-1D5CE0FAD429]@0xffffff7f817a0000->0xffffff7f817a8fff

BSD process name corresponding to current thread: watchdogd

Boot args: chunklist-security-epoch=0 -chunklist-no-rev2-dev

Mac OS version:

19F101

Kernel version:

Darwin Kernel Version 19.5.0: Tue May 26 20:41:44 PDT 2020; root:xnu-6153.121.2~2/RELEASE_X86_64

Kernel UUID: 54F1A78D-6F41-32BD-BFED-4381F9F6E2EF

Kernel slide: 0x0000000000a00000

Kernel text base: 0xffffff8000c00000

__HIB text base: 0xffffff8000b00000

System model name: iMacPro1,1 (Mac-7BA5B2D9E42DDD94)

From what I've read in this thread the current Catalina 15.6 Beta doesn't fix this. Does anyone know if they are at least prioritizing fixing this issue for the full release? My understanding is that the full release will happen around WWDC which happens on June 22. I'm just trying to figure out if it's worthwhile to do a clean Catalina install or not, although I have read that the issue persists with a clean install.

Monkeyman8 wrote:

From what I've read in this thread the current Catalina 15.6 Beta doesn't fix this. Does anyone know if they are at least prioritizing fixing this issue for the full release? .

Unfortunately you wont (shouldnt) see any comments from anyone on the Beta due to its privacy agreement. Anything mentioned here is also removed by the Moderators.

... and yes I have tried a clean install on my Mac Pro (iBin) some months ago. It didn't help me although some have reported improvements. You could potentially install on to a USB SSD and boot from that to test without disrupting existing install.

I can bypass the issue by disconnecting external monitor before computer goes to sleep mode. Computer will restart 100% of times when went to sleep with external monitor connected (type-c to DP cable)

Ok, I have been able to resolve the issue:

First of all, when I detach my 4 LG 4K screens, the system does not cause to "panic" and the restart does not occur.

That is obviously not a solution, as I have these screens for a reason.

Step 1:

I have reset the SMC & the Pram (or whatever these things are called).

Step 2:

I have opened the Terminal application and have typed: "Caffeinate -u -d" as per suggestion of somebody above.

As long I don't close the Terminal application, the system does not "Panic" and doesn't restart.

I think it is quite klunky that a solution like this is necessary, but it works for me...

I just setup two LG 4K (27UL850) monitors today and started experiencing this issue on my 16" MBP.

I crash when going to sleep or turning off my displays 100% of the time when the laptop is in clamshell mode and BOTH monitors connected.

I don't crash when only one monitor is connected or both are connected and the laptop is open.

Both are connected via USB-C. I tried using a USB-C to DP adaptor for one of the monitors but it didn't make a difference.

I tried disabling my spotlight index and it unfortunately didn't help :(

I'm receiving the same kernel panic error that most people are reporting:

panic(cpu 6 caller 0xffffff7f8879cad5): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 140 seconds

If I come across anything I'll post any results I find, and I'm happy to try out things to troubleshoot the problem.