AMD Graphics stalling on 3 Macs with latest El Capitan udpate

hello,

same problem here.

iMac 5k late 2015, i7, AMD R9 M395X 4GB, 32GB ram, 1TB SSD, El Capitan 10.11.6 (15G1212).

it appened 2 times since the last security update ( Security Update 2016-003 (10.11.6)), after 7 - 8 days of activity, OSX hangs for about 10 - 20 seconds (menu-bar clock stops updating).

the first time while I was working on a Win10 vm (Vmware Fusion 8.5.3), the second time while I was scrolling a page in Safari.

it has never happened before the security update.

message from console: stalling for detach from AMDTongaGraphicsAccelerator

There's another discussion in this thread:

Re: Latest ElCap upgrade hanging 10.11.6 - "Stalling for detach"

Someone there said that he sent detailed diagnostics to Apple and they're investigating. So maybe we don't need all the "me too" posts here.

I haven't found any threads about it happening in Sierra, so that may indeed be a way to fix it.

lotlorien wrote:

I have redownloaded 10.11.6, this build does not include the faulty security update.

Are there any tricks or caveats to know about before redownloading and reinstalling 10.11.6? For instance, does macOS gripe about downgrading to an “older” version of the OS or anything like that?

Keep an eye on this thread: Latest ElCap upgrade hanging 10.11.6 - "Stalling for detach" . There you will read that killing the UserEventAgent owned by the user "root" will stop the stalling when it occurs. Nobody knows what side effects this has, but it would at least let you save things and restart. I haven't had to try it yet.

iMac (Retina 5K, 27-inch, Late 2015), with AMD Radeon R9 M395 2048 MB, running 10.11.6. Ran Security Update 2016-003 on 12/31/16. Now when I run a batch action in Photoshop CS6, after around 320 files, computer freezes up like everyone else. When I look at Console log, all messages, when the problem occured, I see:

1/2/17 3:48:40.000 PM kernel[0]: stalling for detach from AMDTongaGraphicsAccelerator

1/2/17 3:48:46.145 PM watchdogd[311]: [watchdog_daemon] @(_wd_daemon_service_thread) - service (com.apple.WindowServer) reported as unresponsive

1/2/17 3:48:46.743 PM com.apple.CDScheduler[398]: Thermal pressure state: 0 Memory pressure state: 0

1/2/17 3:48:46.744 PM com.apple.CDScheduler[48]: Thermal pressure state: 0 Memory pressure state: 0

1/2/17 3:48:47.148 PM watchdogd[311]: [watchdog_daemon] @(__wd_service_report_unresponsive_block_invoke) - failed to gather a spindump for (com.apple.WindowServer)

1/2/17 3:48:55.597 PM WindowServer[237]: WSBindSurface : IOAccelCreateSurface returns -536870201

1/2/17 3:48:55.629 PM WindowServer[237]: disable_update_likely_unbalanced: UI updates still disabled by application "Photoshop" after 19.48 seconds (server forcibly re-enabled them after 1.00 seconds). Likely an unbalanced disableUpdate call.

1/2/17 3:48:55.000 PM kernel[0]: stalling for detach from AMDTongaGraphicsAccelerator

First line repeats about every 15 seconds until I am forced to power it off.

Just spent almost 2 hours with Applecare, which led to this thread, so this seems to be a real issue with that update.

Yes it is, and as to my experience so far, after a couple of days of uptime, any application can trigger it, and only a reboot will make the computer usable again. VMs and Safari with many windows open will trigger the issue much faster, though.

Does anyone know whether or not 10.12.2 is also affected? Thanks.

Same exact problem here. iMac 27" Mid 2010 i7 ATI Radeon HD 5750

Problem seemed to get worse as it went on. Found this thread. I just rebooted and all is working for the moment but had rebooted a few days ago because of same problem. Been avoiding updating to Sierra for a while but might try that if it happens again.

I'm seeing this as well with my 5K iMac (late 2014) as well. In my case just normal use (browsers, whatever is affected) If I ssh into the box, interestingly the shell process doesn't free at all, so it's completely desktop related.

I'm guessing something in the kernel must be spinning after using the GPU to accelerate some operation.....

10.11.6 Radeon R9 M295X.

This issue is ruining my workflow because I have to reboot every other day or so, I need a solution.

So, therefore the question: Am I right is assuming that if one reinstalls 10.11.6 from scratch, the latest security updates are not included, but are offered as an update from the AppStore after the install? These updates were published after the release of 10.11.6, so they should not be included in the 10.11.6 build of El Capitan. If so, a fresh install would eliminate the issue. Thanks.

Seeing the same thing here on two different iMacs. One is several years old and the other is only a few months old. The older one seems to show the problem much more frequently. As others have noted, I keep getting stalls and even the menu bar on top deadlocks. Reboot only solves the problem for a couple of days.

iMac (Retina 5K, 27-inch, Late 2014), El Capitan 10.11.6 with all latest patches.

I am having the same problem with the kernel stalling to detach "AMDTongaGraphicsAccelerator". I've disconnected network, ran diagnostic mode, tried to repair via disk utility and checked SMART status. (I've had these kinds of problems in the past related to the disk spinning down as well as network issues, but this one is distinctly different.)

Reboot will fix the issue and the wait time until the issue re-occurs is unpredictable. The only thing I notice is that it seem to happen when I am not using my computer, only when I have left it alone for a while. I only use my computer 8 hours a day during the week, so this could be by pure chance (75%+ probability it will happen when I am away by random chance).

I'm experiencing the same problem on a Mac mini (Mid 2011) with Core i7 and AMD Radeon HD 6630M graphics and a Cinema Display connected via Thunderbolt. I get the

kernel[0]: stalling for detach from AMDTurksGraphicsAccelerator

message in my Console. My computer is practically usable! Anyone know if upgrading to Sierra will help? I'm guessing the answer is no....